op amp - Page 411 - Developer IT

Somehow Google considers a properly 301'd URL as 200 and is still indexing the new content in old page?

- by user2178914

We redirected all the old URL's to new ones properly using htaccess. The problem is Google, somehow is still finding content in the old page(which it shouldn't) and stores it in the cache rather than the new URL. For eg: Old Page- http://www.natures-energies.com/iching.htm New Page- http://www.natures-energies.com/index.php?option=com_content&view=article&id=760 If you type the old URL into the browser it redirects If you fetch the old URL as Googlebot in the webmaster tools the header says 301/permanently redirected. If I try to crawl as any other bot it still says 301 redirected. Even if you click the old link in Google it redirects to the new URL. Only in its cache it shows the old URL and moreover it shows the new content in it! I am stumped on how Google manages to grab the new content and puts in the old URL instead of the new one! One more interesting thing is that if I try a cache for the new page it shows the cache of the new content with old URL! Any help would be appreciated. I am at end of my wits. I think i have tried almost everything. Is there anything that I'm missing to see? You can use this search to find the old url's. Maybe you'll some patterns that i missed. site:www.natures-energies.com inurl:htm -inurl:https|index

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rigidbody2d.Addforce( ) behaves wieirdly unity 4.3 [on hold]

- by Lilz Votca Love

So guys ive edited the question and here is what my problem is i have a player which has a rigidbody2d attached to it.my player is able to doublejump in the air nicely and stick to walls when colliding with them and slowly slides to the ground.All movement is handle through physics and no transform manipulations.here i did something similar to this in the FixedUpdate of my player. void FixedUpdate() { if(wall && Input.GetButtonDown("Jump")) { if(facingright)//player is facing the left side of the wall { rigidbody2D.Addforce(new vector2(-1f,2f)*jumpforce); /*Now the player should jump backwards following this directional vector and should follow a smooth curve which in this part works well*/ } else { rigidbody2D.Addforce(new vector2(1f,2f)*jumpforce); /*Now this is where everything gets complicated as you should have noticed this is the same directional vector only the opposite x axis value and the same amount of force is used but it behaves like the red curve in the picture below*/ } } } bad behaviour and vector in red .I tested the same thing(both addforce methods) for a simple jump and they exactly behave like mentionned above in the picture.so here is my problem.Jumping diagonally forward with rigidbody2d.addforce() do not have the same impact,do not follow the same curve as jumping the opposite direction with the same exact amount of force.if i could fix this or get past this i could implement a walljump system like a ninja jumping in zigzag between two opposite wall to climb them.Any ideas or alternatives?

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Actionscript - Dropping Multiple Objects Using an Array? [closed]

- by Eratosthenes

Possible Duplicate: Actionscript - Dropping Multiple Objects Using an Array? I'm trying to get these fireBalls to drop more often, im not sure if im using Math.random correctly also, for some reason I'm getting a null reference because I think the fireBalls array waits for one to leave the stage before dropping another one? this is the relevant code: var sun:Sun=new Sun var fireBalls:Array=new Array() var left:Boolean; function onEnterFrame(event:Event){ if (left) { sun.x = sun.x - 15; }else{ sun.x = sun.x + 15; } if (fireBalls.length>0&&fireBalls[0].y>stage.stageHeight){ // Fireballs exit stage removeChild(fireBalls[0]); fireBalls.shift(); } for (var j:int=0; j<fireBalls.length; j++){ fireBalls[j].y=fireBalls[j].y+15; if (fireBalls[j].y>stage.stageHeight-fireBall.width/2){ } } if (Math.random()<.2){ // Fireballs shooting from Sun var fireBall:FireBall=new FireBall; fireBall.x=sun.x; addChild(fireBall); fireBalls.push(fireBall); } }

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How to create distinct set from other sets?

- by shyam_baidya

While solving the problems on Techgig.com, I got struck with one one of the problem. The problem is like this: A company organizes two trips for their employees in a year. They want to know whether all the employees can be sent on the trip or not. The condition is like, no employee can go on both the trips. Also to determine which employee can go together the constraint is that the employees who have worked together in past won't be in the same group. Examples of the problems: Suppose the work history is given as follows: {(1,2),(2,3),(3,4)}; then it is possible to accommodate all the four employees in two trips (one trip consisting of employees 1& 3 and other having employees 2 & 4). Neither of the two employees in the same trip have worked together in past. Suppose the work history is given as {(1,2),(1,3),(2,3)} then there is no way possible to have two trips satisfying the company rule and accommodating all the employees. Can anyone tell me how to proceed on this problem?

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How can I port msvc++ code with non-dependent names in templates to Linux?

- by user352382

I can deal with porting platform dependent functions. I have a problem that the compilers I tried on Linux (clang and g++) do not accept the following code, while the msvc++ compiler does: template <class T> class Base { protected: T Value; }; template <class T> class Derived : public Base<T> { public: void setValue(const T& inValue){ Value = inValue; } }; int main(int argc, char const *argv[]) { Derived<int> tmp; tmp.setValue(0); return 0; } g++ error: main.cpp: In member function ‘void Derived<T>::setValue(const T&)’: main.cpp:11:3: error: ‘Value’ was not declared in this scope I believe this due to the use of a non-dependent name (Value) in the second class. More information. The problem is that I have a very large code base, in which this type of code is used very often. I understand that it is wrong when looking at the standard. However it is very convenient not having to write this-> or Base<T>:: in front of every use of Value. Even writing using Base<T>::Value; at the start of the derived class is problematic when you use ~20 members of the base class. So my question is: are there compilers for Linux that allow this kind of code (with or without extra compiler switches)? Or are there small modifications that will allow this code to compile on Linux?

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How do you make a precise countdown timer using clock_gettime? [migrated]

- by Joshun

Could somebody please explain how to make a countdown timer using clock_gettime, under Linux. I know you can use the clock() function to get cpu time, and multiply it by CLOCKS_PER_SEC to get actual time, but I'm told the clock() function is not well suited for this. So far I have attempted this (a billion is to pause for one second) #include <stdio.h> #include <time.h> #define BILLION 1000000000 int main() { struct timespec rawtime; clock_gettime(CLOCK_MONOTONIC_RAW, &rawtime); unsigned long int current = ( rawtime.tv_sec + rawtime.tv_nsec ); unsigned long int end = (( rawtime.tv_sec + rawtime.tv_nsec ) + BILLION ); while ( current < end ) { clock_gettime(CLOCK_MONOTONIC_RAW, &rawtime); current = ( rawtime.tv_sec + rawtime.tv_nsec ); } return 0; } I know this wouldn't be very useful on its own, but once I've found out how to time correctly I can use this in my projects. I know that sleep() can be used for this purpose, but I want to code the timer myself so that I can better integrate it in my projects - such as the possibility of it returning the time left, as opposed to pausing the whole program.

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Game Development

- by Sundareswaran Senthilvel

I'm planning to write a game from scratch (a BIG Game, for commercial purpose). I'm aware that there are certain compute libraries like OpenCL, AMD APP SDK, C++ AMP as well as DirectCompute - both from MS (NOT interested in CUDA) are available in the market. I'm planning to write the game from the scratch, which includes the following engines... 1.Physics Engine 2.AI Engine 3.Main Game Engine (... and if anything is missed). I'm aware that, there are some free physics engine libraries in the market. Not sure about free AI engine libraries. I'm bit confused in choosing between the OpenCL, AMD APP SDK, and C++ AMP libraries (as already mentioned i'm NOT interested in CUDA). I want my game to be published in Windows/Android/Mac OSX. It means it should be a cross-platform game. I will be having "one source code" that i'll compile for various platforms like Windows/Android/Mac OSX, and any others if i missed. Note: Since I'm NOT a Java guy, kindly do NOT suggest me the Java Language. For Graphics language should i use OpenGL or DirectX 11? I have heard that OpenGL runs on a single core, and not sure of DirectX 11. Between OpenGL and DirectX which one should i follow? or else, are there any other graphics language that i need to start with? I want to make use of the parallelism in GPU as well as CPU.

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No wubildr, No spaceleft, Boot Error and A previous installation was detected in D:\ubuntu. Please uninstall that before continuing

- by tdc2bdc

At first I was downloading Ubuntu 12.10 using Windows Installer, but I cancelled it after just 2-3 minutes and dowloaded 32-Bit ISO (ubuntu-12.10-desktop-i386). Then I created bootable USB Stick (new HP 210 v210 w) using Pendrivelinux (Universal-USB-Installer-1.9.1.4). I Formatted D Drive. (Both by Windows & EaseUS) I've set boot priority correctly. But after getting message "Boot Error", I ran wubi.exe directly from USB drive. Now the message is "A previous installation was detected in D:\ubuntu. Please uninstall that before continuing." I formatted D: again and performed disk check, surface test using EaseUS. It shows no error or bad sectors. Formatted & checked my pendrive too. Directly ran .iso. But same error keeps coming. I found way around above problems, by copying extracted .iso on D:\ and installing Ubuntu using wubi.exe and though on boot it was shown with Windows 7, selecting it caused following error Try hd(0,0): NTFS5 : No wubildr Try hd(0,1): NTFS5 : So, I uninstalled it and Reeinstalled it Now installation fails at around 7mins saying " An error occurred. No space left on device. For more info please see log file " My D: is a 9 GB partition. (99% Free) Ubuntu Site 12.10 says it needs around 4.5 GB. Now Trying it by extendin D: to 10 GB... Got No wubildr. Please help. tdc2bdc

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Function not returning value at all - not a void [migrated]

- by user105439

I have this function that is not returning a function value. I've added some random testers to try and debug but no luck. Thanks! #include <stdio.h> #include <math.h> #include <time.h> #define N 100 float error(int a, int b); int main(){ printf("START\n"); srand(time(NULL)); int a, b, j, m; float plot[N+1]; printf("Lower bound for x: "); scanf("%d", &a); printf("Upper bound for x: "); scanf("%d", &b); printf("okay\n"); for(j = 0; j < N; j++) plot[j] = 0; printf("okay1\n"); m = error(a,b); printf("%f\n",m); return 0; } float error(int a, int b){ float product = a*b; printf("%f\n",product); return product; } so the m = error(a,b) always gives 0 no matter what! Please help. I apologise for not cleaning this up...

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How to swap or move 2 string in Array? [on hold]

- by Wisnu Khazefa

I have a need to convert .csv file to .dat file. In my problem, there are value pairs, with a name attribute (called Fund) and corresponding numeric value. If the input file has a pair whose value is 0, then that pair (Fund and value) is dropped. The output file should have only those pairs (Fund and value) where the value is non-zero. Here is the prototype of my code. public static void Check_Fund(){ String header = "Text1,Text2,Text3,FUND_UALFND_1,FUND_UALPRC_1,FUND_UALFND_2," +"FUND_UALPRC_2,FUND_UALFND_3,FUND_UALPRC_3,FUND_UALFND_4,FUND_UALPRC_4,FUND_UALFND_5,FUND_UALPRC_5,Text4,Text5,Text6,Text7"; String text = "ABC;CDE;EFG;PRMF;0;PRFF;50;PREF;0;PRCF;0;PRMP;50;TAHU;;BAKWAN;SINGKONG"; String[] head; String[] value; String showText = ""; head = header.split(","); value = text.split(";"); String regex = "\\d+"; String[] fund = {"PREF","PRMF","PRFF","PRCF","PRMP","PDFF","PSEF","PSCB","PSMF","PRGC","PREP"}; for(int i = 0; i < value.length; i++){ for(int j=0;j < fund.length; j++){ if(value[i].equals(fund[j]) && value[i+1].matches(regex)){ if(value[i+1].equals("0")){ value[i] = ""; value[i+1] = ""; } } } showText = showText + head[i] +":" + value[i] + System.lineSeparator(); } System.out.println(showText ); } Expected Result Input: FUND_UALFND_1:PRMF FUND_UALPRC_1:0 FUND_UALFND_2:PRFF FUND_UALPRC_2:50 FUND_UALFND_3:PREF FUND_UALPRC_3:0 FUND_UALFND_4:PRCF FUND_UALPRC_4:0 FUND_UALFND_5:PRMP FUND_UALPRC_5:50 Output: FUND_UALFND_1:PRFF FUND_UALPRC_1:50 FUND_UALFND_2:PRMP FUND_UALPRC_2:50 FUND_UALFND_0: FUND_UALPRC_0: FUND_UALFND_0: FUND_UALPRC_0: FUND_UALFND_0: FUND_UALPRC_0:

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What does the Sys_PageIn() function do in Quake?

- by Philip

I've noticed in the initialization process of the original Quake the following function is called. volatile int sys_checksum; // **lots of code** void Sys_PageIn(void *ptr, int size) { byte *x; int j,m,n; //touch all memory to make sure its there. The 16-page skip is to //keep Win 95 from thinking we're trying to page ourselves in (we are //doing that, of course, but there's no reason we shouldn't) x = (byte *)ptr; for (n=0 ; n<4 ; n++) { for (m=0; m<(size - 16 * 0x1000) ; m += 4) { sys_checksum += *(int *)&x[m]; sys_checksum += *(int *)&x[m + 16 * 0x10000]; } } } I think I'm just not familiar enough with paging to understand this function. the void* ptr passed to the function is a recently malloc()'d piece of memory that is size bytes big. This is the whole function - j is an unreferenced variable. My best guess is that the volatile int sys_checksum is forcing the system to physically read all of the space that was just malloc()'d, perhaps to ensure that these spaces exist in virtual memory? Is this right? And why would someone do this? Is it for some antiquated Win95 reason?

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I failed FizzBuzz, would you hire me? [closed]

- by ja_programmer

I'm a developer with a CS degree and have work experience doing development in a number of languages for almost 3 years. Today had an interview (2nd interview) with a panel of people. Overall it went quite well, I prepared for most of the questions and felt ready for anything. At the end of the interview, they gave me ONE programming question...a problem like FizzBuzz (without the print the number part). I believe I made too many mistakes and thus have "failed" it. Is all hope lost for me? Here is my code: void FizzBuzz() { for(int i = 0; i <= 100; i++) { bool isThree = i % 3; bool isFive = i % 5; if (isThree) { print "Fizz\n"; } else if(isFive) { print "Buzz\n"; } else { print "FizzBuzz\n"; } } } As you can see I messed up the bools which should have the syntax i % 3 == 0; If I'm remembering the question right I also put an else instead of an elseif with isThree && isFive. I was quite stressed, but that's no excuse for missing a simple problem. So the question is, if my work history and personality fit with the job and this is the only code you've seen, would you hire me?

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Evaluating this huge .... thing? [closed]

- by Shark

I'll just leave this here: superTiled = ((((gctUINT32) (hardware->chipMinorFeatures)) >> (0 ? 12:12) & ((gctUINT32) ((((1 ? 12:12) - (0 ? 12:12) + 1) == 32) ? ~0 : (~(~0 << ((1 ? 12:12) - (0 ? 12:12) + 1)))))) == (0x1 & ((gctUINT32) ((((1 ? 12:12) - (0 ? 12:12) + 1) == 32) ? ~0 : (~(~0 << ((1 ? 12:12) - (0 ? 12:12) + 1))))))); If you can break it down into 'steps' or a single numeric value - props to you :) I see that this is generated/ unwrapped macros code but .... can't really wrap around it atm. The first person that breaks this down / simplifies it a bit gets to know which driver i found it in. Cheers :)

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Attempt at Merge Sort: Is this correct? [migrated]

- by Beatrice

I am trying to write a merge sort algo. I can't tell if this is actually a canonical merge sort. If I knew how to calculate the runtime I would give that a go. Does anyone have any pointers? Thanks. public static void main(String[] argsv) { int[] A = {2, 4, 5, 7, 1, 2, 3, 6}; int[] L, R; L = new int[A.length/2]; R = new int[A.length/2]; int i = 0, j = 0, k; for (k = 0; k < A.length; k++) { if (k < A.length/2) { L[i] = A[k]; i++; } else { R[j] = A[k]; j++; } } i = 0; j = 0; for (k = 0; k < A.length; k++) { System.out.println(i + " " + j + " " + k); if (i < L.length && j < R.length) { if (L[i] < R[j]) { A[k] = L[i]; i++; } else { A[k] = R[j]; j++; } } } }

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Applying ServiceKnownTypeAttribute to WCF service with Spring

- by avidgoffer

I am trying to apply the ServiceKnownTypeAttribute to my WCF Service but keep getting the error below my config. Does anyone have any ideas? <object id="HHGEstimating" type="Spring.ServiceModel.ServiceExporter, Spring.Services"> <property name="TargetName" value="HHGEstimatingHelper"/> <property name="Name" value="HHGEstimating"/> <property name="Namespace" value="http://www.igcsoftware.com/HHGEstimating"/> <property name="TypeAttributes"> <list> <ref local="wcfErrorBehavior"/> <ref local="wcfSilverlightFaultBehavior"/> <object type="System.ServiceModel.ServiceKnownTypeAttribute, System.ServiceModel"> <constructor-arg name="type" value="IGCSoftware.HHG.Business.UserControl.AtlasUser, IGCSoftware.HHG.Business"/> </object> </list> </property> Error thrown by a dependency of object 'HHGEstimating' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' : '1' constructor arguments specified but no matching constructor found in object 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' (hint: specify argument indexes, names, or types to avoid ambiguities). while resolving 'TypeAttributes[2]' to 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: Spring.Objects.Factory.ObjectCreationException: Error thrown by a dependency of object 'HHGEstimating' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' : '1' constructor arguments specified but no matching constructor found in object 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' (hint: specify argument indexes, names, or types to avoid ambiguities). while resolving 'TypeAttributes[2]' to 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [ObjectCreationException: Error thrown by a dependency of object 'HHGEstimating' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' : '1' constructor arguments specified but no matching constructor found in object 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' (hint: specify argument indexes, names, or types to avoid ambiguities). while resolving 'TypeAttributes[2]' to 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46'] Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolveInnerObjectDefinition(String name, String innerObjectName, String argumentName, IObjectDefinition definition, Boolean singletonOwner) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\ObjectDefinitionValueResolver.cs:300 Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolvePropertyValue(String name, IObjectDefinition definition, String argumentName, Object argumentValue) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\ObjectDefinitionValueResolver.cs:150 Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolveValueIfNecessary(String name, IObjectDefinition definition, String argumentName, Object argumentValue) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\ObjectDefinitionValueResolver.cs:112 Spring.Objects.Factory.Config.ManagedList.Resolve(String objectName, IObjectDefinition definition, String propertyName, ManagedCollectionElementResolver resolver) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Config\ManagedList.cs:126 Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolvePropertyValue(String name, IObjectDefinition definition, String argumentName, Object argumentValue) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\ObjectDefinitionValueResolver.cs:201 Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolveValueIfNecessary(String name, IObjectDefinition definition, String argumentName, Object argumentValue) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\ObjectDefinitionValueResolver.cs:112 Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.ApplyPropertyValues(String name, RootObjectDefinition definition, IObjectWrapper wrapper, IPropertyValues properties) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:373 Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.PopulateObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:563 Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:1844 Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:918 Spring.Objects.Factory.Support.AbstractObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:2120 Spring.Objects.Factory.Support.AbstractObjectFactory.GetObjectInternal(String name, Type requiredType, Object[] arguments, Boolean suppressConfigure) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:2046 Spring.Objects.Factory.Support.DefaultListableObjectFactory.PreInstantiateSingletons() in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\DefaultListableObjectFactory.cs:505 Spring.Context.Support.AbstractApplicationContext.Refresh() in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\AbstractApplicationContext.cs:911 _dynamic_Spring.Context.Support.XmlApplicationContext..ctor(Object[] ) +197 Spring.Reflection.Dynamic.SafeConstructor.Invoke(Object[] arguments) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Reflection\Dynamic\DynamicConstructor.cs:116 Spring.Context.Support.RootContextInstantiator.InvokeContextConstructor(ConstructorInfo ctor) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:550 Spring.Context.Support.ContextInstantiator.InstantiateContext() in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:494 Spring.Context.Support.ContextHandler.InstantiateContext(IApplicationContext parentContext, Object configContext, String contextName, Type contextType, Boolean caseSensitive, String[] resources) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:330 Spring.Context.Support.ContextHandler.Create(Object parent, Object configContext, XmlNode section) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:280 [ConfigurationErrorsException: Error creating context 'spring.root': Error thrown by a dependency of object 'HHGEstimating' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' : '1' constructor arguments specified but no matching constructor found in object 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' (hint: specify argument indexes, names, or types to avoid ambiguities). while resolving 'TypeAttributes[2]' to 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46'] System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) +202 System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject) +1061 System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject) +1431 System.Configuration.BaseConfigurationRecord.GetSection(String configKey, Boolean getLkg, Boolean checkPermission) +56 System.Configuration.BaseConfigurationRecord.GetSection(String configKey) +8 System.Web.Configuration.HttpConfigurationSystem.GetApplicationSection(String sectionName) +45 System.Web.Configuration.HttpConfigurationSystem.GetSection(String sectionName) +49 System.Web.Configuration.HttpConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String configKey) +6 System.Configuration.ConfigurationManager.GetSection(String sectionName) +78 Spring.Util.ConfigurationUtils.GetSection(String sectionName) in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Util\ConfigurationUtils.cs:69 Spring.Context.Support.ContextRegistry.InitializeContextIfNeeded() in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextRegistry.cs:340 Spring.Context.Support.ContextRegistry.GetContext() in l:\projects\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextRegistry.cs:206 Spring.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String reference, Uri[] baseAddresses) in l:\projects\spring-net\trunk\src\Spring\Spring.Services\ServiceModel\Activation\ServiceHostFactory.cs:66 System.ServiceModel.HostingManager.CreateService(String normalizedVirtualPath) +11687036 System.ServiceModel.HostingManager.ActivateService(String normalizedVirtualPath) +42 System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) +479 [ServiceActivationException: The service '/HHGEstimating.svc' cannot be activated due to an exception during compilation. The exception message is: Error creating context 'spring.root': Error thrown by a dependency of object 'HHGEstimating' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46' : '1' constructor arguments specified but no matching constructor found in object 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' (hint: specify argument indexes, names, or types to avoid ambiguities). while resolving 'TypeAttributes[2]' to 'System.ServiceModel.ServiceKnownTypeAttribute#25A5628' defined in 'assembly [IGCSoftware.HHG.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null], resource [IGCSoftware.HHG.WebService.Resources.Spring.objects.xml] line 46'.] System.ServiceModel.AsyncResult.End(IAsyncResult result) +11592858 System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +194 System.ServiceModel.Activation.HostedHttpRequestAsyncResult.ExecuteSynchronous(HttpApplication context, Boolean flowContext) +176 System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e) +275 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

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Generating moderately interesting images

- by Williham Totland

Abstract: Can you propose a mathematical-ish algorithm over a plane of pixels that will generate a moderately interesting image, preferably one that on the whole resembles something? The story thus far: Once upon a time I decided in an effort to reduce cycle waste on my (admittedly too) numerous computers, and set out to generate images in a moderately interesting fashion; using a PRNG and some clever math to create images that would, on the whole, resemble something. Or at least, that was the plan. As it turns out, clever math requires being a clever mathematician; this I am not. At some length I arrived at a method that preferred straight lines (as these are generally the components of which our world is made), perhaps too strongly. The result is mildly interesting; resembling, perhaps, city grids as such: Now for the question proper: Given the source code of this little program; can you improve upon it and propose a method that gives somewhat more interesting results? (e.g. not city grids, but perhaps faces, animals, geography, what have you) This is also meant as a sort of challenge; I suppose and as such I've set down some completely arbitrary and equally optional rules: The comments in the code says it all really. Suggestions and "solutions" should edit the algorithm itself, not the surrounding framework, except as for to fix errors that prevents the sample from compiling. The code should compile cleanly with a standard issue C compiler. (If the example provided doesn't, oops! Tell me, and I'll fix. :) The method should, though again, this is optional, not need to elicit help from your friendly neighborhood math library. Solutions should probably be deliverable by simply yanking out whatever is between the snip lines (the ones that say you should not edit above and below, respectively), with a statement to the effect of what you need to add to the preamble in particular. The code requires a C compiler and libpng to build; I'm not entirely confident that the MinGW compiler provides the necessities, but I would be surprised if it didn't. For Debian you'll want the libpng-dev package, and for Mac OS X you'll want the XCode tools.. The source code can be downloaded here. Warning: Massive code splurge incoming! // compile with gcc -o imggen -lpng imggen.c // optionally with -DITERATIONS=x, where x is an appropriate integer // If you're on a Mac or using MinGW, you may have to fiddle with the linker flags to find the library and includes. #include <stdio.h> #include <stdlib.h> #include <png.h> #ifdef ITERATIONS #define REPEAT #endif // ITERATIONS // YOU MAY CHANGE THE FOLLOWING DEFINES #define WIDTH 320 #define HEIGHT 240 // YOU MAY REPLACE THE FOLLOWING DEFINES AS APPROPRIATE #define INK 16384 void writePNG (png_bytepp imageBuffer, png_uint_32 width, png_uint_32 height, int iteration) { char *fname; asprintf(&fname, "out.%d.png", iteration); FILE *fp = fopen(fname, "wb"); if (!fp) return; png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); png_infop info_ptr = png_create_info_struct(png_ptr); png_init_io(png_ptr, fp); png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, PNG_FILTER_NONE); png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); png_set_rows(png_ptr, info_ptr, imageBuffer); png_set_invert_mono(png_ptr); /// YOU MAY COMMENT OUT THIS LINE png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL); png_destroy_write_struct(&png_ptr, &info_ptr); fclose(fp); free(fname); } int main (int argc, const char * argv[]) { png_uint_32 height = HEIGHT, width = WIDTH; int iteration = 1; #ifdef REPEAT for (iteration = 1; iteration <= ITERATIONS; iteration++) { #endif // REPEAT png_bytepp imageBuffer = malloc(sizeof(png_bytep) * height); for (png_uint_32 i = 0; i < height; i++) { imageBuffer[i] = malloc(sizeof(png_byte) * width); for (png_uint_32 j = 0; j < width; j++) { imageBuffer[i][j] = 0; } } /// CUT ACROSS THE DASHED LINES /// ------------------------------------------- /// NO EDITING ABOVE THIS LINE; EXCEPT AS NOTED int ink = INK; int x = rand() % width, y = rand() % height; int xdir = (rand() % 2)?1:-1; int ydir = (rand() % 2)?1:-1; while (ink) { imageBuffer[y][x] = 255; --ink; xdir += (rand() % 2)?(1):(-1); ydir += (rand() % 2)?(1):(-1); if (ydir > 0) { ++y; } else if (ydir < 0) { --y; } if (xdir > 0) { ++x; } else if (xdir < 0) { --x; } if (x == -1 || y == -1 || x == width || y == height || x == y && x == 0) { x = rand() % width; y = rand() % height; xdir = (rand() % 2)?1:-1; ydir = (rand() % 2)?1:-1; } } /// NO EDITING BELOW THIS LINE /// ------------------------------------------- writePNG(imageBuffer, width, height, iteration); for (png_uint_32 i = 0; i < height; i++) { free(imageBuffer[i]); } free(imageBuffer); #ifdef REPEAT } #endif // REPEAT return 0; } Note: While this question doesn't strictly speaking seem "answerable" as such; I still believe that it can give rise to some manner of "right" answer. Maybe. Happy hunting.

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Records not being saved to core data sqlite file

- by esd100

I'm a complete newbie when it comes to iOS programming and much less Core Data. It's rather non-intuitive for me, as I really came into my own with programming with MATLAB, which I guess is more of a 'scripting' language. At any rate, my problem is that I had no idea what I had to do to create a database for my application. So I read a little bit and thought I had to create a SQL database of my stuff and then import it. Long story short, I created a SQLite db and I want to use the work I have already done to import stuff into my CoreData database. I tried exporting to comma-delimited files and xml files and reading those in, but I didn't like it and it seemed like an extra step that I shouldn't need to do. So, I imported the SQLite database into my resources and added the sqlite framework. I have my core data model setup and it is setting up the SQLite database for the model correctly in the background. When I run through my program to add objects to my entities, it seems to work and I can even fetch results afterward. However, when I inspect the Core Data Database SQLite file, no records have been saved. How is it possible for it to fetch results but not save them to the database? - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{ //load in the path for resources NSString *paths = [[NSBundle mainBundle] resourcePath]; NSString *databaseName = @"histology.sqlite"; NSString *databasePath = [paths stringByAppendingPathComponent:databaseName]; [self createDatabase:databasePath ]; NSError *error; if ([[self managedObjectContext] save:&error]) { NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]); } // Test listing all CELLS from the store NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entityMO = [NSEntityDescription entityForName:@"CELL" inManagedObjectContext:[self managedObjectContext]]; [fetchRequest setEntity:entityMO]; NSArray *fetchedObjects = [[self managedObjectContext] executeFetchRequest:fetchRequest error:&error]; for (CELL *cellName in fetchedObjects) { //NSLog(@"cellName: %@", cellName); } -(void) createDatabase:databasePath { NSLog(@"The createDatabase function was entered."); NSLog(@"The databasePath is %@ ",[databasePath description]); // Setup the database object sqlite3 *histoDatabase; // Open the database from filessytem if(sqlite3_open([databasePath UTF8String], &histoDatabase) == SQLITE_OK) { NSLog(@"The database was opened"); // Setup the SQL Statement and compile it for faster access const char *sqlStatement = "SELECT * FROM CELL"; sqlite3_stmt *compiledStatement; if(sqlite3_prepare_v2(histoDatabase, sqlStatement, -1, &compiledStatement, NULL) != SQLITE_OK) { NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(histoDatabase)); } if(sqlite3_prepare_v2(histoDatabase, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { // Loop through the results and add them to cell MO array while(sqlite3_step(compiledStatement) == SQLITE_ROW) { CELL *cellMO = [NSEntityDescription insertNewObjectForEntityForName:@"CELL" inManagedObjectContext:[self managedObjectContext]]; if (sqlite3_column_type(compiledStatement, 0) != SQLITE_NULL) { cellMO.cellName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; } else { cellMO.cellName = @"undefined"; } if (sqlite3_column_type(compiledStatement, 1) != SQLITE_NULL) { cellMO.cellDescription = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]; } else { cellMO.cellDescription = @"undefined"; } NSLog(@"The contents of NSString *cellName = %@",[cellMO.cellName description]); } } // Release the compiled statement from memory sqlite3_finalize(compiledStatement); } sqlite3_close(histoDatabase); } I have a feeling that it has something to do with the timing of opening/closing both of the databases? Attached I have some SQL debugging output to the terminal 2012-05-28 16:03:39.556 MedPix[34751:fb03] The createDatabase function was entered. 2012-05-28 16:03:39.557 MedPix[34751:fb03] The databasePath is /Users/jack/Library/Application Support/iPhone Simulator/5.1/Applications/A6B2A79D-BA93-4E24-9291-5B7948A3CDF4/MedPix.app/histology.sqlite 2012-05-28 16:03:39.559 MedPix[34751:fb03] The database was opened 2012-05-28 16:03:39.560 MedPix[34751:fb03] The database was prepared 2012-05-28 16:03:39.575 MedPix[34751:fb03] CoreData: annotation: Connecting to sqlite database file at "/Users/jack/Library/Application Support/iPhone Simulator/5.1/Applications/A6B2A79D-BA93-4E24-9291-5B7948A3CDF4/Documents/MedPix.sqlite" 2012-05-28 16:03:39.576 MedPix[34751:fb03] CoreData: annotation: creating schema. 2012-05-28 16:03:39.577 MedPix[34751:fb03] CoreData: sql: pragma page_size=4096 2012-05-28 16:03:39.578 MedPix[34751:fb03] CoreData: sql: pragma auto_vacuum=2 2012-05-28 16:03:39.630 MedPix[34751:fb03] CoreData: sql: BEGIN EXCLUSIVE 2012-05-28 16:03:39.631 MedPix[34751:fb03] CoreData: sql: SELECT TBL_NAME FROM SQLITE_MASTER WHERE TBL_NAME = 'Z_METADATA' 2012-05-28 16:03:39.632 MedPix[34751:fb03] CoreData: sql: CREATE TABLE ZCELL ( Z_PK INTEGER PRIMARY KEY, Z_ENT INTEGER, Z_OPT INTEGER, ZCELLDESCRIPTION VARCHAR, ZCELLNAME VARCHAR ) ... 2012-05-28 16:03:39.669 MedPix[34751:fb03] CoreData: annotation: Creating primary key table. 2012-05-28 16:03:39.671 MedPix[34751:fb03] CoreData: sql: CREATE TABLE Z_PRIMARYKEY (Z_ENT INTEGER PRIMARY KEY, Z_NAME VARCHAR, Z_SUPER INTEGER, Z_MAX INTEGER) 2012-05-28 16:03:39.672 MedPix[34751:fb03] CoreData: sql: INSERT INTO Z_PRIMARYKEY(Z_ENT, Z_NAME, Z_SUPER, Z_MAX) VALUES(1, 'CELL', 0, 0) ... 2012-05-28 16:03:39.701 MedPix[34751:fb03] CoreData: sql: CREATE TABLE Z_METADATA (Z_VERSION INTEGER PRIMARY KEY, Z_UUID VARCHAR(255), Z_PLIST BLOB) 2012-05-28 16:03:39.702 MedPix[34751:fb03] CoreData: sql: SELECT TBL_NAME FROM SQLITE_MASTER WHERE TBL_NAME = 'Z_METADATA' 2012-05-28 16:03:39.703 MedPix[34751:fb03] CoreData: sql: DELETE FROM Z_METADATA WHERE Z_VERSION = ? 2012-05-28 16:03:39.704 MedPix[34751:fb03] CoreData: sql: INSERT INTO Z_METADATA (Z_VERSION, Z_UUID, Z_PLIST) VALUES (?, ?, ?) 2012-05-28 16:03:39.705 MedPix[34751:fb03] CoreData: sql: COMMIT 2012-05-28 16:03:39.710 MedPix[34751:fb03] CoreData: sql: pragma cache_size=200 2012-05-28 16:03:39.711 MedPix[34751:fb03] CoreData: sql: SELECT Z_VERSION, Z_UUID, Z_PLIST FROM Z_METADATA 2012-05-28 16:03:39.712 MedPix[34751:fb03] The contents of NSString *cellName = Beta Cell 2012-05-28 16:03:39.712 MedPix[34751:fb03] The contents of NSString *cellName = Gastric Chief Cell ... 2012-05-28 16:03:39.714 MedPix[34751:fb03] The database was prepared 2012-05-28 16:03:39.764 MedPix[34751:fb03] The createDatabase function has finished. Now fetching. 2012-05-28 16:03:39.765 MedPix[34751:fb03] CoreData: sql: SELECT 0, t0.Z_PK, t0.Z_OPT, t0.ZCELLDESCRIPTION, t0.ZCELLNAME FROM ZCELL t0 2012-05-28 16:03:39.766 MedPix[34751:fb03] CoreData: annotation: sql connection fetch time: 0.0008s 2012-05-28 16:03:39.767 MedPix[34751:fb03] CoreData: annotation: total fetch execution time: 0.0016s for 0 rows. 2012-05-28 16:03:39.768 MedPix[34751:fb03] cellName: <CELL: 0x6bbc120> (entity: CELL; id: 0x6bbc160 <x-coredata:///CELL/t57D10DDD-74E2-474F-97EE-E3BD0FF684DA34> ; data: { cellDescription = "S cells are cells which release secretin, found in the jejunum and duodenum. They are stimulated by a drop in pH to 4 or below in the small intestine's lumen. The released secretin will increase the s"; cellName = "S Cell"; organs = ( ); specimens = ( ); systems = ( ); tissues = ( ); }) ... Sections were cut short to abbreviate. But note that the fetch results contain information, but it says that total fetch execution was for "0" rows? How can that be? Any help will be greatly appreciated, especially detailed explanations. :) Thanks.

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what does calling ´this´ outside of a jquery plugin refer to

- by Richard

Hi, I am using the liveTwitter plugin The problem is that I need to stop the plugin from hitting the Twitter api. According to the documentation I need to do this $("#tab1 .container_twitter_status").each(function(){ this.twitter.stop(); }); Already, the each does not make sense on an id and what does this refer to? Anyway, I get an undefined error. I will paste the plugin code and hope it makes sense to somebody MY only problem thusfar with this plugin is that I need to be able to stop it. thanks in advance, Richard /* * jQuery LiveTwitter 1.5.0 * - Live updating Twitter plugin for jQuery * * Copyright (c) 2009-2010 Inge Jørgensen (elektronaut.no) * Licensed under the MIT license (MIT-LICENSE.txt) * * $Date: 2010/05/30$ */ /* * Usage example: * $("#twitterSearch").liveTwitter('bacon', {limit: 10, rate: 15000}); */ (function($){ if(!$.fn.reverse){ $.fn.reverse = function() { return this.pushStack(this.get().reverse(), arguments); }; } $.fn.liveTwitter = function(query, options, callback){ var domNode = this; $(this).each(function(){ var settings = {}; // Handle changing of options if(this.twitter) { settings = jQuery.extend(this.twitter.settings, options); this.twitter.settings = settings; if(query) { this.twitter.query = query; } this.twitter.limit = settings.limit; this.twitter.mode = settings.mode; if(this.twitter.interval){ this.twitter.refresh(); } if(callback){ this.twitter.callback = callback; } // ..or create a new twitter object } else { // Extend settings with the defaults settings = jQuery.extend({ mode: 'search', // Mode, valid options are: 'search', 'user_timeline' rate: 15000, // Refresh rate in ms limit: 10, // Limit number of results refresh: true }, options); // Default setting for showAuthor if not provided if(typeof settings.showAuthor == "undefined"){ settings.showAuthor = (settings.mode == 'user_timeline') ? false : true; } // Set up a dummy function for the Twitter API callback if(!window.twitter_callback){ window.twitter_callback = function(){return true;}; } this.twitter = { settings: settings, query: query, limit: settings.limit, mode: settings.mode, interval: false, container: this, lastTimeStamp: 0, callback: callback, // Convert the time stamp to a more human readable format relativeTime: function(timeString){ var parsedDate = Date.parse(timeString); var delta = (Date.parse(Date()) - parsedDate) / 1000; var r = ''; if (delta < 60) { r = delta + ' seconds ago'; } else if(delta < 120) { r = 'a minute ago'; } else if(delta < (45*60)) { r = (parseInt(delta / 60, 10)).toString() + ' minutes ago'; } else if(delta < (90*60)) { r = 'an hour ago'; } else if(delta < (24*60*60)) { r = '' + (parseInt(delta / 3600, 10)).toString() + ' hours ago'; } else if(delta < (48*60*60)) { r = 'a day ago'; } else { r = (parseInt(delta / 86400, 10)).toString() + ' days ago'; } return r; }, // Update the timestamps in realtime refreshTime: function() { var twitter = this; $(twitter.container).find('span.time').each(function(){ $(this).html(twitter.relativeTime(this.timeStamp)); }); }, // Handle reloading refresh: function(initialize){ var twitter = this; if(this.settings.refresh || initialize) { var url = ''; var params = {}; if(twitter.mode == 'search'){ params.q = this.query; if(this.settings.geocode){ params.geocode = this.settings.geocode; } if(this.settings.lang){ params.lang = this.settings.lang; } if(this.settings.rpp){ params.rpp = this.settings.rpp; } else { params.rpp = this.settings.limit; } // Convert params to string var paramsString = []; for(var param in params){ if(params.hasOwnProperty(param)){ paramsString[paramsString.length] = param + '=' + encodeURIComponent(params[param]); } } paramsString = paramsString.join("&"); url = "http://search.twitter.com/search.json?"+paramsString+"&callback=?"; } else if(twitter.mode == 'user_timeline') { url = "http://api.twitter.com/1/statuses/user_timeline/"+encodeURIComponent(this.query)+".json?count="+twitter.limit+"&callback=?"; } else if(twitter.mode == 'list') { var username = encodeURIComponent(this.query.user); var listname = encodeURIComponent(this.query.list); url = "http://api.twitter.com/1/"+username+"/lists/"+listname+"/statuses.json?per_page="+twitter.limit+"&callback=?"; } $.getJSON(url, function(json) { var results = null; if(twitter.mode == 'search'){ results = json.results; } else { results = json; } var newTweets = 0; $(results).reverse().each(function(){ var screen_name = ''; var profile_image_url = ''; if(twitter.mode == 'search') { screen_name = this.from_user; profile_image_url = this.profile_image_url; created_at_date = this.created_at; } else { screen_name = this.user.screen_name; profile_image_url = this.user.profile_image_url; // Fix for IE created_at_date = this.created_at.replace(/^(\w+)\s(\w+)\s(\d+)(.*)(\s\d+)$/, "$1, $3 $2$5$4"); } var userInfo = this.user; var linkified_text = this.text.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function(m) { return m.link(m); }); linkified_text = linkified_text.replace(/@[A-Za-z0-9_]+/g, function(u){return u.link('http://twitter.com/'+u.replace(/^@/,''));}); linkified_text = linkified_text.replace(/#[A-Za-z0-9_\-]+/g, function(u){return u.link('http://search.twitter.com/search?q='+u.replace(/^#/,'%23'));}); if(!twitter.settings.filter || twitter.settings.filter(this)) { if(Date.parse(created_at_date) > twitter.lastTimeStamp) { newTweets += 1; var tweetHTML = '<div class="tweet tweet-'+this.id+'">'; if(twitter.settings.showAuthor) { tweetHTML += '<img width="24" height="24" src="'+profile_image_url+'" />' + '<p class="text"><span class="username"><a href="http://twitter.com/'+screen_name+'">'+screen_name+'</a>:</span> '; } else { tweetHTML += '<p class="text"> '; } tweetHTML += linkified_text + ' <span class="time">'+twitter.relativeTime(created_at_date)+'</span>' + '</p>' + '</div>'; $(twitter.container).prepend(tweetHTML); var timeStamp = created_at_date; $(twitter.container).find('span.time:first').each(function(){ this.timeStamp = timeStamp; }); if(!initialize) { $(twitter.container).find('.tweet-'+this.id).hide().fadeIn(); } twitter.lastTimeStamp = Date.parse(created_at_date); } } }); if(newTweets > 0) { // Limit number of entries $(twitter.container).find('div.tweet:gt('+(twitter.limit-1)+')').remove(); // Run callback if(twitter.callback){ twitter.callback(domNode, newTweets); } // Trigger event $(domNode).trigger('tweets'); } }); } }, start: function(){ var twitter = this; if(!this.interval){ this.interval = setInterval(function(){twitter.refresh();}, twitter.settings.rate); this.refresh(true); } }, stop: function(){ if(this.interval){ clearInterval(this.interval); this.interval = false; } } }; var twitter = this.twitter; this.timeInterval = setInterval(function(){twitter.refreshTime();}, 5000); this.twitter.start(); } }); return this; }; })(jQuery);

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Flash IO error while uploading photo with low uploading internet speed

- by Beck

Actionscript: System.security.allowDomain("http://" + _root.tdomain + "/"); import flash.net.FileReferenceList; import flash.net.FileReference; import flash.external.ExternalInterface; import flash.external.*; /* Main variables */ var session_photos = _root.ph; var how_much_you_can_upload = 0; var selected_photos; // container for selected photos var inside_photo_num = 0; // for photo in_array selection var created_elements = _root.ph; var for_js_num = _root.ph; /* Functions & settings for javascript<->flash conversation */ var methodName:String = "addtoflash"; var instance:Object = null; var method:Function = addnewphotonumber; var wasSuccessful:Boolean = ExternalInterface.addCallback(methodName, instance, method); function addnewphotonumber() { session_photos--; created_elements--; for_js_num--; } /* Javascript hide and show flash button functions */ function block(){getURL("Javascript: blocking();");} function unblock(){getURL("Javascript:unblocking();");} /* Creating HTML platform function */ var result = false; /* Uploading */ function uploadthis(photos:Array) { if(!photos[inside_photo_num].upload("http://" + _root.tdomain + "/upload.php?PHPSESSID=" + _root.phpsessionid)) { getURL("Javascript:error_uploading();"); } } /* Flash button(applet) options and bindings */ var fileTypes:Array = new Array(); var imageTypes:Object = new Object(); imageTypes.description = "Images (*.jpg)"; imageTypes.extension = "*.jpg;"; fileTypes.push(imageTypes); var fileListener:Object = new Object(); var btnListener:Object = new Object(); btnListener.click = function(eventObj:Object) { var fileRef:FileReferenceList = new FileReferenceList(); fileRef.addListener(fileListener); fileRef.browse(fileTypes); } uploadButton.addEventListener("click", btnListener); /* Listeners */ fileListener.onSelect = function(fileRefList:FileReferenceList):Void { // reseting values inside_photo_num = 0; var list:Array = fileRefList.fileList; var item:FileReference; // PHP photo counter how_much_you_can_upload = 3 - session_photos; if(list.length > how_much_you_can_upload) { getURL("Javascript:howmuch=" + how_much_you_can_upload + ";list_length=" + list.length + ";limit_reached();"); return; } // if session variable isn't yet refreshed, we check inner counter if(created_elements >= 3) { getURL("Javascript:limit_reached();"); return; } selected_photos = list; for(var i:Number = 0; i < list.length; i++) { how_much_you_can_upload--; item = list[i]; trace("name: " + item.name); trace(item.addListener(this)); if((item.size / 1024) > 5000) {getURL("Javascript:size_limit_reached();");return;} } result = false; setTimeout(block,500); /* Increment number for new HTML container and pass it to javascript, after javascript returns true and we start uploading */ for_js_num++; if(ExternalInterface.call("create_platform",for_js_num)) { uploadthis(selected_photos); } } fileListener.onProgress = function(file:FileReference, bytesLoaded:Number, bytesTotal:Number):Void { getURL("Javascript:files_process(" + bytesLoaded + "," + bytesTotal + "," + for_js_num + ");"); } fileListener.onComplete = function(file:FileReference, bytesLoaded:Number, bytesTotal:Number):Void { inside_photo_num++; var sendvar_lv:LoadVars = new LoadVars(); var loadvar_lv:LoadVars = new LoadVars(); loadvar_lv.onLoad = function(success:Boolean){ if(loadvar_lv.failed == 1) { getURL("Javascript:type_failed();"); return; } getURL("Javascript:filelinks='" + loadvar_lv.json + "';fullname='" + loadvar_lv.fullname + "';completed(" + for_js_num + ");"); created_elements++; if((inside_photo_num + 1) > selected_photos.length) {setTimeout(unblock,1000);return;} // don't create empty containers anymore if(created_elements >= 3) {return;} result = false; /* Increment number for new HTML container and pass it to javascript, after javascript returns true and we start uploading */ for_js_num++; if(ExternalInterface.call("create_platform",for_js_num)) { uploadthis(selected_photos); } } sendvar_lv.getnum = true; sendvar_lv.PHPSESSID = _root.phpsessionid; sendvar_lv.sendAndLoad("http://" + _root.tdomain + "/upload.php",loadvar_lv,"POST"); } fileListener.onCancel = function(file:FileReference):Void { } fileListener.onOpen = function(file:FileReference):Void { } fileListener.onHTTPError = function(file:FileReference, httpError:Number):Void { getURL("Javascript:http_error(" + httpError + ");"); } fileListener.onSecurityError = function(file:FileReference, errorString:String):Void { getURL("Javascript:security_error(" + errorString + ");"); } fileListener.onIOError = function(file:FileReference):Void { getURL("Javascript:io_error();"); selected_photos[inside_photo_num].cancel(); uploadthis(selected_photos); } <PARAM name="allowScriptAccess" value="always"> <PARAM name="swliveconnect" value="true"> <PARAM name="movie" value="http://www.localh.com/fileref.swf?ph=0&phpsessionid=8mirsjsd75v6vk583vkus50qbb2djsp6&tdomain=www.localh.com"> <PARAM name="wmode" value="opaque"> <PARAM name="quality" value="high"> <PARAM name="bgcolor" value="#ffffff"> <EMBED swliveconnect="true" wmode="opaque" src="http://www.localh.com/fileref.swf?ph=0&phpsessionid=8mirsjsd75v6vk583vkus50qbb2djsp6&tdomain=www.localh.com" quality="high" bgcolor="#ffffff" width="100" height="22" name="fileref" align="middle" allowScriptAccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></EMBED> My uploading speed is 40kb/sec Getting flash error while uploading photos bigger than 500kb and getting no error while uploading photos less than 100-500kb~. My friend has 8mbit uploading speed and has no errors even while uploading 3.2mb photos and more. How to fix this problem? I have tried to re-upload on IO error trigger, but it stops at the same place. Any solution regarding this error? By the way, i was watching process via debugging proxy and figured out, that responce headers doesn't come at all on this IO error. And sometimes shows socket error. If need, i will post serverside php script as well. But it stops at if(isset($_FILES['Filedata'])) { so it won't help :) as all processing comes after this check.

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Char error C langauge

- by Nadeem tabbaa

i have a project for a course, i did almost everything but i have this error i dont know who to solve it... the project about doing our own shell some of them we have to write our code, others we will use the fork method.. this is the code, #include <sys/wait.h> #include <dirent.h> #include <limits.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include<stdio.h> #include<fcntl.h> #include<unistd.h> #include<sys/stat.h> #include<sys/types.h> int main(int argc, char **argv) { pid_t pid; char str[21], *arg[10]; int x,status,number; system("clear"); while(1) { printf("Rshell>" ); fgets(str,21,stdin); x = 0; arg[x] = strtok(str, " \n\t"); while(arg[x]) arg[++x] = strtok(NULL, " \n\t"); if(NULL!=arg[0]) { if(strcasecmp(arg[0],"cat")==0) //done { int f=0,n; char l[1]; struct stat s; if(x!=2) { printf("Mismatch argument\n"); } /*if(access(arg[1],F_OK)) { printf("File Exist"); exit(1); } if(stat(arg[1],&s)<0) { printf("Stat ERROR"); exit(1); } if(S_ISREG(s.st_mode)<0) { printf("Not a Regular FILE"); exit(1); } if(geteuid()==s.st_uid) if(s.st_mode & S_IRUSR) f=1; else if(getegid()==s.st_gid) if(s.st_mode & S_IRGRP) f=1; else if(s.st_mode & S_IROTH) f=1; if(!f) { printf("Permission denied"); exit(1); }*/ f=open(arg[1],O_RDONLY); while((n=read(f,l,1))>0) write(1,l,n); } else if(strcasecmp(arg[0],"rm")==0) //done { if( unlink( arg[1] ) != 0 ) perror( "Error deleting file" ); else puts( "File successfully deleted" ); } else if(strcasecmp(arg[0],"rmdir")==0) //done { if( remove( arg[1] ) != 0 ) perror( "Error deleting Directory" ); else puts( "Directory successfully deleted" ); } else if(strcasecmp(arg[0],"ls")==0) //done { DIR *dir; struct dirent *dirent; char *where = NULL; //printf("x== %i\n",x); //printf("x== %s\n",arg[1]); //printf("x== %i\n",get_current_dir_name()); if (x == 1) where = get_current_dir_name(); else where = arg[1]; if (NULL == (dir = opendir(where))) { fprintf(stderr,"%d (%s) opendir %s failed\n", errno, strerror(errno), where); return 2; } while (NULL != (dirent = readdir(dir))) { printf("%s\n", dirent->d_name); } closedir(dir); } else if(strcasecmp(arg[0],"cp")==0) //not yet for Raed { FILE *from, *to; char ch; if(argc!=3) { printf("Usage: copy <source> <destination>\n"); exit(1); } /* open source file */ if((from = fopen(argv[1], "rb"))==NULL) { printf("Cannot open source file.\n"); exit(1); } /* open destination file */ if((to = fopen(argv[2], "wb"))==NULL) { printf("Cannot open destination file.\n"); exit(1); } /* copy the file */ while(!feof(from)) { ch = fgetc(from); if(ferror(from)) { printf("Error reading source file.\n"); exit(1); } if(!feof(from)) fputc(ch, to); if(ferror(to)) { printf("Error writing destination file.\n"); exit(1); } } if(fclose(from)==EOF) { printf("Error closing source file.\n"); exit(1); } if(fclose(to)==EOF) { printf("Error closing destination file.\n"); exit(1); } } else if(strcasecmp(arg[0],"mv")==0)//done { if( rename(arg[1],arg[2]) != 0 ) perror( "Error moving file" ); else puts( "File successfully moved" ); } else if(strcasecmp(arg[0],"hi")==0)//done { printf("hello\n"); } else if(strcasecmp(arg[0],"exit")==0) // done { return 0; } else if(strcasecmp(arg[0],"sleep")==0) // done { if(x==1) printf("plz enter the # seconds to sleep\n"); else sleep(atoi(arg[1])); } else if(strcmp(arg[0],"history")==0) // not done { FILE *infile; //char fname[40]; char line[100]; int lcount; ///* Read in the filename */ //printf("Enter the name of a ascii file: "); //fgets(History.txt, sizeof(fname), stdin); /* Open the file. If NULL is returned there was an error */ if((infile = fopen("History.txt", "r")) == NULL) { printf("Error Opening File.\n"); exit(1); } while( fgets(line, sizeof(line), infile) != NULL ) { /* Get each line from the infile */ lcount++; /* print the line number and data */ printf("Line %d: %s", lcount, line); } fclose(infile); /* Close the file */ writeHistory(arg); //write to txt file every new executed command //read from the file once the history command been called //if a command called not for the first time then just replace it to the end of the file } else if(strncmp(arg[0],"@",1)==0) // not done { //scripting files // read from the file command by command and executing them } else if(strcmp(arg[0],"type")==0) //not done { //if(x==1) //printf("plz enter the argument\n"); //else //type((arg[1])); } else { pid = fork( ); if (pid == 0) { execlp(arg[0], arg[0], arg[1], arg[2], NULL); printf ("EXEC Failed\n"); } else { wait(&status); if(strcmp(arg[0],"clear")!=0) { printf("status %04X\n",status); if(WIFEXITED(status)) printf("Normal termination, exit code %d\n", WEXITSTATUS(status)); else printf("Abnormal termination\n"); } } } } } } void writeHistory(char *arg[]) { FILE *file; file = fopen("History.txt","a+"); /* apend file (add text to a file or create a file if it does not exist.*/ int i =0; while(strcasecmp(arg[0],NULL)==0) { fprintf(file,"%s ",arg[i]); /*writes*/ } fprintf(file,"\n"); /*new line*/ fclose(file); /*done!*/ getchar(); /* pause and wait for key */ //return 0; } the thing is when i compile the code, this what it gives me /home/ugics/st255375/ICS431Labs/Project/Rshell.c: At top level: /home/ugics/st255375/ICS431Labs/Project/Rshell.c:264: warning: conflicting types for ‘writeHistory’ /home/ugics/st255375/ICS431Labs/Project/Rshell.c:217: note: previous implicit declaration of ‘writeHistory’ was here can any one help me??? thanks

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migrating Solaris to RH: network latency issue, tcp window size & other tcp parameters

- by Bastien

Hello I have a client/server app (Java) that I'm migrating from Solaris to RH Linux. since I started running it in RH, I noticed some issues related to latency. I managed to isolate the problem that looks like this: client sends 5 messages (32 bytes each) in a row (same application timestamp) to the server. server echos messages. client receives replies and prints round trip time for each msg. in Solaris, all is well: I get ALL 5 replies at the same time, roughly 80ms after having sent original messages (client & server are several thousands miles away from each other: my ping RTT is 80ms, all normal). in RH, first 3 messages are echoed normally (they arrive 80ms after they've been sent), however the following 2 arrive 80ms later (so total 160ms RTT). the pattern is always the same. clearly looked like a TCP problem. on my solaris box, I had previously configured the tcp stack with 2 specific options: disable nagle algorithm globally set tcp_deferred_acks_max to 0 on RH, it's not possible to disable nagle globally, but I disabled it on all of my apps' sockets (TCP_NODELAY). so I started playing with tcpdump (on the server machine), and compared both outputs: SOLARIS: 22 2.085645 client server TCP 56150 > 6006 [PSH, ACK] Seq=111 Ack=106 Win=66672 Len=22 "MSG_1 RCV" 23 2.085680 server client TCP 6006 > 56150 [ACK] Seq=106 Ack=133 Win=50400 Len=0 24 2.085908 client server TCP 56150 > 6006 [PSH, ACK] Seq=133 Ack=106 Win=66672 Len=22 "MSG_2 RCV" 25 2.085925 server client TCP 6006 > 56150 [ACK] Seq=106 Ack=155 Win=50400 Len=0 26 2.086175 client server TCP 56150 > 6006 [PSH, ACK] Seq=155 Ack=106 Win=66672 Len=22 "MSG_3 RCV" 27 2.086192 server client TCP 6006 > 56150 [ACK] Seq=106 Ack=177 Win=50400 Len=0 28 2.086243 server client TCP 6006 > 56150 [PSH, ACK] Seq=106 Ack=177 Win=50400 Len=21 "MSG_1 ECHO" 29 2.086440 client server TCP 56150 > 6006 [PSH, ACK] Seq=177 Ack=106 Win=66672 Len=22 "MSG_4 RCV" 30 2.086454 server client TCP 6006 > 56150 [ACK] Seq=127 Ack=199 Win=50400 Len=0 31 2.086659 server client TCP 6006 > 56150 [PSH, ACK] Seq=127 Ack=199 Win=50400 Len=21 "MSG_2 ECHO" 32 2.086708 client server TCP 56150 > 6006 [PSH, ACK] Seq=199 Ack=106 Win=66672 Len=22 "MSG_5 RCV" 33 2.086721 server client TCP 6006 > 56150 [ACK] Seq=148 Ack=221 Win=50400 Len=0 34 2.086947 server client TCP 6006 > 56150 [PSH, ACK] Seq=148 Ack=221 Win=50400 Len=21 "MSG_3 ECHO" 35 2.087196 server client TCP 6006 > 56150 [PSH, ACK] Seq=169 Ack=221 Win=50400 Len=21 "MSG_4 ECHO" 36 2.087500 server client TCP 6006 > 56150 [PSH, ACK] Seq=190 Ack=221 Win=50400 Len=21 "MSG_5 ECHO" 37 2.165390 client server TCP 56150 > 6006 [ACK] Seq=221 Ack=148 Win=66632 Len=0 38 2.166314 client server TCP 56150 > 6006 [ACK] Seq=221 Ack=190 Win=66588 Len=0 39 2.364135 client server TCP 56150 > 6006 [ACK] Seq=221 Ack=211 Win=66568 Len=0 REDHAT: 17 2.081163 client server TCP 55879 > 6006 [PSH, ACK] Seq=111 Ack=106 Win=66672 Len=22 "MSG_1 RCV" 18 2.081178 server client TCP 6006 > 55879 [ACK] Seq=106 Ack=133 Win=5888 Len=0 19 2.081297 server client TCP 6006 > 55879 [PSH, ACK] Seq=106 Ack=133 Win=5888 Len=21 "MSG_1 ECHO" 20 2.081711 client server TCP 55879 > 6006 [PSH, ACK] Seq=133 Ack=106 Win=66672 Len=22 "MSG_2 RCV" 21 2.081761 client server TCP 55879 > 6006 [PSH, ACK] Seq=155 Ack=106 Win=66672 Len=22 "MSG_3 RCV" 22 2.081846 server client TCP 6006 > 55879 [PSH, ACK] Seq=127 Ack=177 Win=5888 Len=21 "MSG_2 ECHO" 23 2.081995 server client TCP 6006 > 55879 [PSH, ACK] Seq=148 Ack=177 Win=5888 Len=21 "MSG_3 ECHO" 24 2.082011 client server TCP 55879 > 6006 [PSH, ACK] Seq=177 Ack=106 Win=66672 Len=22 "MSG_4 RCV" 25 2.082362 client server TCP 55879 > 6006 [PSH, ACK] Seq=199 Ack=106 Win=66672 Len=22 "MSG_5 RCV" 26 2.082377 server client TCP 6006 > 55879 [ACK] Seq=169 Ack=221 Win=5888 Len=0 27 2.171003 client server TCP 55879 > 6006 [ACK] Seq=221 Ack=148 Win=66632 Len=0 28 2.171019 server client TCP 6006 > 55879 [PSH, ACK] Seq=169 Ack=221 Win=5888 Len=42 "MSG_4 ECHO + MSG_5 ECHO" 29 2.257498 client server TCP 55879 > 6006 [ACK] Seq=221 Ack=211 Win=66568 Len=0 so, I got confirmation things are not working correctly for RH: packet 28 is sent TOO LATE, it looks like the server is waiting for packet 27's ACK before doing anything. seems to me it's the most likely reason... then I realized that the "Win" parameters are different on Solaris & RH dumps: 50400 on Solaris, only 5888 on RH. that's another hint... I read the doc about the slide window & buffer window, and played around with the rcvBuffer & sendBuffer in java on my sockets, but never managed to change this 5888 value to anything else (I checked each time directly with tcpdump). does anybody know how to do this ? I'm having a hard time getting definitive information, as in some cases there's "auto-negotiation" that I might need to bypass, etc... I eventually managed to get only partially rid of my initial problem by setting the "tcp_slow_start_after_idle" parameter to 0 on RH, but it did not change the "win" parameter at all. the same problem was there for the first 4 groups of 5 messages, with TCP retransmission & TCP Dup ACK in tcpdump, then the problem disappeared altogether for all following groups of 5 messages. It doesn't seem like a very clean and/or generic solution to me. I'd really like to reproduce the exact same conditions under both OSes. I'll keep researching, but any help from TCP gurus would be greatly appreciated ! thanks !

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PHP Form: After getting results adding a new table row when entering new information.

- by Chris

Hello, Although probarly quite simple, i cannot seem to find the following. The form takes certain data, and then represents the data in a table. Next step i click the hyperlink that takes me back to the form. Now my question is how exactly do i make it possible when filling in the same form again so both results are displayed in the same table? Then filling in a other form with data adds another row and so on. Regards. The code below (pardon me that it is not english). <?php session_start(); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-Strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>ExpoFormulier</title> <body> <?php if (!empty($_POST)) { $standnaam = $_POST["standnaam"]; $oppervlakte = $_POST["oppervlakte"]; //value in the form van checkboxes op 1 zetten! $verdieping = isset($_POST["verdieping"]) ? $_POST["verdieping"] : 0; //if checkbox checked value 1 anders 0 $telefoon = isset($_POST["telefoon"]) ? $_POST["telefoon"] : 0; $netwerk = isset($_POST["netwerk"]) ? $_POST["netwerk"] : 0; if (is_numeric($oppervlakte)) { $_SESSION["standnaam"]=$standnaam; $_SESSION["oppervlakte"]=$oppervlakte; $_SESSION["verdieping"]=$verdieping; $_SESSION["telefoon"]=$telefoon; $_SESSION["netwerk"]=$netwerk; header("Location:ExpoOverzicht.php"); //verzenden naar ExpoOverzicht.php dmv header } else { echo "<h1>Foute gegevens, Opnieuw invullen a.u.b</h1>"; } } ?> <form action="<?php echo $_SERVER["PHP_SELF"]; ?>" method="post" id="form1"> <h1>Vul de gegevens in</h1> <table> <tr> <td>Standnaam:</td> <td><input type="text" name="standnaam" size="18"/></td> </tr> <tr> <td>Oppervlakte (in m^2):</td> <td><input type="text" name="oppervlakte" size="6"/></td> </tr> <tr> <td>Verdieping:</td> <td><input type="checkbox" name="verdieping" value="1"/></td>  </tr> <tr> <td>Telefoon:</td> <td><input type="checkbox" name="telefoon" value="1"/></td> </tr> <tr> <td>Netwerk:</td> <td><input type="checkbox" name="netwerk" value="1"/></td> </tr> <tr> <td><input type="submit" name="verzenden" value="Verzenden"/></td> </tr> </table> </form> Second File: <?php session_start(); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-Strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>ExpoOverzicht</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link href="StyleSheetExpo.css" rel="stylesheet" type="text/css" /> </head> <body> <h1>Overzicht van de ingegeven standen in deze sessie</h1> <?php $standnaam = $_SESSION["standnaam"]; $oppervlakte = $_SESSION["oppervlakte"]; $verdieping = $_SESSION["verdieping"]; $telefoon = $_SESSION["telefoon"]; $netwerk = $_SESSION["netwerk"]; $result1 = 0; //telkens declaren anders fout "undefined variable" $result2 = 0; $result3 = 0; $prijsCom = 0; $prijsVerdieping = 0; for ($i=1; $i <= $oppervlakte; $i++) { if($i <= 10) { $tarief1 = 1 * 100; $result1 += $tarief1; } if($i > 10 && $i <= 30) { $tarief2 = 1 * 90; $result2 += $tarief2; } if($i > 30) { $tarief3 = 1 * 80; $result3 += $tarief3; } } $prijsOpp = $result1 + $result2 + $result3; if($verdieping == 1) { $prijsVerdieping = $oppervlakte * 120; } if(($telefoon == 1) || ($netwerk == 1)) // eerst deze OR conditie of anders gebruikt de code alleen nog maar 20 { $prijsCom = 20; } if(($telefoon == 1) && ($netwerk == 1)) { $prijsCom = 30; } $totalePrijs = $prijsOpp + $prijsVerdieping + $prijsCom; echo "<table class=\"tableExpo\">"; echo "<th>Standnaam</th>"; echo "<th>Oppervlakte</th>"; echo "<th>Verdieping</th>"; echo "<th>Telefoon</th>"; echo "<th>Netwerk</th>"; echo "<th>Totale prijs</th>"; echo "<tr>"; echo "<td>".$standnaam."</td>"; echo "<td>".$oppervlakte."</td>"; echo "<td>".$verdieping."</td>"; echo "<td>".$telefoon."</td>"; echo "<td>".$netwerk."</td>"; echo "<td>".$totalePrijs."</td>"; echo "</tr>"; echo "</table>"; ?> <a href="ExpoFormulier.php">Terug naar het formulier</a> </body> </html> </body> </html>

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I need some help with either my SQL or my PHP I do not know which...

- by sico87

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Failure with LogonUser in MC++

- by Alikar

After fighting with this for a week I have not really gotten anywhere in why it constantly fails in my code, but not in other examples. My code, which while it compiles, will not log into a user that I know has the correct login information. Where it fails is the following line: wi = gcnew WindowsIdentity(token); It fails here because the token is zero, meaning that it was never set to a user token. Here is my full code: #ifndef UNCAPI_H #define UNCAPI_H #include <windows.h> #pragma once using namespace System; using namespace System::Runtime::InteropServices; using namespace System::Security::Principal; using namespace System::Security::Permissions; namespace UNCAPI { public ref class UNCAccess { public: //bool Logon(String ^_srUsername, String ^_srDomain, String ^_srPassword); [PermissionSetAttribute(SecurityAction::Demand, Name = "FullTrust")] bool Logon(String ^_srUsername, String ^_srDomain, String ^_srPassword) { bool bSuccess = false; token = IntPtr(0); bSuccess = LogonUser(_srUsername, _srDomain, _srPassword, 8, 0, &tokenHandle); if(bSuccess) { wi = gcnew WindowsIdentity(token); wic = wi->Impersonate(); } return bSuccess; } void UNCAccess::Logoff() { if (wic != nullptr ) { wic->Undo(); } CloseHandle((int*)token.ToPointer()); } private: [DllImport("advapi32.dll", SetLastError=true)]//[DllImport("advapi32.DLL", EntryPoint="LogonUserW", SetLastError=true, CharSet=CharSet::Unicode, ExactSpelling=true, CallingConvention=CallingConvention::StdCall)] bool static LogonUser(String ^lpszUsername, String ^lpszDomain, String ^lpszPassword, int dwLogonType, int dwLogonProvider, IntPtr *phToken); [DllImport("KERNEL32.DLL", EntryPoint="CloseHandle", SetLastError=true, CharSet=CharSet::Unicode, ExactSpelling=true, CallingConvention=CallingConvention::StdCall)] bool static CloseHandle(int *handle); IntPtr token; WindowsIdentity ^wi; WindowsImpersonationContext ^wic; };// End of Class UNCAccess }// End of Name Space #endif UNCAPI_H Now using this slightly modified example from Microsoft I was able to get a login and a token: #using <mscorlib.dll> #using <System.dll> using namespace System; using namespace System::Runtime::InteropServices; using namespace System::Security::Principal; using namespace System::Security::Permissions; [assembly:SecurityPermissionAttribute(SecurityAction::RequestMinimum, UnmanagedCode=true)] [assembly:PermissionSetAttribute(SecurityAction::RequestMinimum, Name = "FullTrust")]; [DllImport("advapi32.dll", SetLastError=true)] bool LogonUser(String^ lpszUsername, String^ lpszDomain, String^ lpszPassword, int dwLogonType, int dwLogonProvider, IntPtr* phToken); [DllImport("kernel32.dll", CharSet=System::Runtime::InteropServices::CharSet::Auto)] int FormatMessage(int dwFlags, IntPtr* lpSource, int dwMessageId, int dwLanguageId, String^ lpBuffer, int nSize, IntPtr *Arguments); [DllImport("kernel32.dll", CharSet=CharSet::Auto)] bool CloseHandle(IntPtr handle); [DllImport("advapi32.dll", CharSet=CharSet::Auto, SetLastError=true)] bool DuplicateToken(IntPtr ExistingTokenHandle, int SECURITY_IMPERSONATION_LEVEL, IntPtr* DuplicateTokenHandle); // GetErrorMessage formats and returns an error message // corresponding to the input errorCode. String^ GetErrorMessage(int errorCode) { int FORMAT_MESSAGE_ALLOCATE_BUFFER = 0x00000100; int FORMAT_MESSAGE_IGNORE_INSERTS = 0x00000200; int FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000; //int errorCode = 0x5; //ERROR_ACCESS_DENIED //throw new System.ComponentModel.Win32Exception(errorCode); int messageSize = 255; String^ lpMsgBuf = ""; int dwFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS; IntPtr ptrlpSource = IntPtr::Zero; IntPtr prtArguments = IntPtr::Zero; int retVal = FormatMessage(dwFlags, &ptrlpSource, errorCode, 0, lpMsgBuf, messageSize, &prtArguments); if (0 == retVal) { throw gcnew Exception(String::Format( "Failed to format message for error code {0}. ", errorCode)); } return lpMsgBuf; } // Test harness. // If you incorporate this code into a DLL, be sure to demand FullTrust. [PermissionSetAttribute(SecurityAction::Demand, Name = "FullTrust")] int main() { IntPtr tokenHandle = IntPtr(0); IntPtr dupeTokenHandle = IntPtr(0); try { String^ userName; String^ domainName; // Get the user token for the specified user, domain, and password using the // unmanaged LogonUser method. // The local machine name can be used for the domain name to impersonate a user on this machine. Console::Write("Enter the name of the domain on which to log on: "); domainName = Console::ReadLine(); Console::Write("Enter the login of a user on {0} that you wish to impersonate: ", domainName); userName = Console::ReadLine(); Console::Write("Enter the password for {0}: ", userName); const int LOGON32_PROVIDER_DEFAULT = 0; //This parameter causes LogonUser to create a primary token. const int LOGON32_LOGON_INTERACTIVE = 2; const int SecurityImpersonation = 2; tokenHandle = IntPtr::Zero; dupeTokenHandle = IntPtr::Zero; // Call LogonUser to obtain a handle to an access token. bool returnValue = LogonUser(userName, domainName, Console::ReadLine(), LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, &tokenHandle); Console::WriteLine("LogonUser called."); if (false == returnValue) { int ret = Marshal::GetLastWin32Error(); Console::WriteLine("LogonUser failed with error code : {0}", ret); Console::WriteLine("\nError: [{0}] {1}\n", ret, GetErrorMessage(ret)); int errorCode = 0x5; //ERROR_ACCESS_DENIED throw gcnew System::ComponentModel::Win32Exception(errorCode); } Console::WriteLine("Did LogonUser Succeed? {0}", (returnValue?"Yes":"No")); Console::WriteLine("Value of Windows NT token: {0}", tokenHandle); // Check the identity. Console::WriteLine("Before impersonation: {0}", WindowsIdentity::GetCurrent()->Name); bool retVal = DuplicateToken(tokenHandle, SecurityImpersonation, &dupeTokenHandle); if (false == retVal) { CloseHandle(tokenHandle); Console::WriteLine("Exception thrown in trying to duplicate token."); return -1; } // The token that is passed to the following constructor must // be a primary token in order to use it for impersonation. WindowsIdentity^ newId = gcnew WindowsIdentity(dupeTokenHandle); WindowsImpersonationContext^ impersonatedUser = newId->Impersonate(); // Check the identity. Console::WriteLine("After impersonation: {0}", WindowsIdentity::GetCurrent()->Name); // Stop impersonating the user. impersonatedUser->Undo(); // Check the identity. Console::WriteLine("After Undo: {0}", WindowsIdentity::GetCurrent()->Name); // Free the tokens. if (tokenHandle != IntPtr::Zero) CloseHandle(tokenHandle); if (dupeTokenHandle != IntPtr::Zero) CloseHandle(dupeTokenHandle); } catch(Exception^ ex) { Console::WriteLine("Exception occurred. {0}", ex->Message); } Console::ReadLine(); }// end of function Why should Microsoft's code succeed, where mine fails?

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Suggestions for duplicate file finder algorithm (using C)

- by Andrei Ciobanu

Hello, I wanted to write a program that test if two files are duplicates (have exactly the same content). First I test if the files have the same sizes, and if they have i start to compare their contents. My first idea, was to "split" the files into fixed size blocks, then start a thread for every block, fseek to startup character of every block and continue the comparisons in parallel. When a comparison from a thread fails, the other working threads are canceled, and the program exits out of the thread spawning loop. The code looks like this: dupf.h #ifndef __NM__DUPF__H__ #define __NM__DUPF__H__ #define NUM_THREADS 15 #define BLOCK_SIZE 8192 /* Thread argument structure */ struct thread_arg_s { const char *name_f1; /* First file name */ const char *name_f2; /* Second file name */ int cursor; /* Where to seek in the file */ }; typedef struct thread_arg_s thread_arg; /** * 'arg' is of type thread_arg. * Checks if the specified file blocks are * duplicates. */ void *check_block_dup(void *arg); /** * Checks if two files are duplicates */ int check_dup(const char *name_f1, const char *name_f2); /** * Returns a valid pointer to a file. * If the file (given by the path/name 'fname') cannot be opened * in 'mode', the program is interrupted an error message is shown. **/ FILE *safe_fopen(const char *name, const char *mode); #endif dupf.c #include <errno.h> #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include "dupf.h" FILE *safe_fopen(const char *fname, const char *mode) { FILE *f = NULL; f = fopen(fname, mode); if (f == NULL) { char emsg[255]; sprintf(emsg, "FOPEN() %s\t", fname); perror(emsg); exit(-1); } return (f); } void *check_block_dup(void *arg) { const char *name_f1 = NULL, *name_f2 = NULL; /* File names */ FILE *f1 = NULL, *f2 = NULL; /* Streams */ int cursor = 0; /* Reading cursor */ char buff_f1[BLOCK_SIZE], buff_f2[BLOCK_SIZE]; /* Character buffers */ int rchars_1, rchars_2; /* Readed characters */ /* Initializing variables from 'arg' */ name_f1 = ((thread_arg*)arg)->name_f1; name_f2 = ((thread_arg*)arg)->name_f2; cursor = ((thread_arg*)arg)->cursor; /* Opening files */ f1 = safe_fopen(name_f1, "r"); f2 = safe_fopen(name_f2, "r"); /* Setup cursor in files */ fseek(f1, cursor, SEEK_SET); fseek(f2, cursor, SEEK_SET); /* Initialize buffers */ rchars_1 = fread(buff_f1, 1, BLOCK_SIZE, f1); rchars_2 = fread(buff_f2, 1, BLOCK_SIZE, f2); if (rchars_1 != rchars_2) { /* fread failed to read the same portion. * program cannot continue */ perror("ERROR WHEN READING BLOCK"); exit(-1); } while (rchars_1-->0) { if (buff_f1[rchars_1] != buff_f2[rchars_1]) { /* Different characters */ fclose(f1); fclose(f2); pthread_exit("notdup"); } } /* Close streams */ fclose(f1); fclose(f2); pthread_exit("dup"); } int check_dup(const char *name_f1, const char *name_f2) { int num_blocks = 0; /* Number of 'blocks' to check */ int num_tsp = 0; /* Number of threads spawns */ int tsp_iter = 0; /* Iterator for threads spawns */ pthread_t *tsp_threads = NULL; thread_arg *tsp_threads_args = NULL; int tsp_threads_iter = 0; int thread_c_res = 0; /* Thread creation result */ int thread_j_res = 0; /* Thread join res */ int loop_res = 0; /* Function result */ int cursor; struct stat buf_f1; struct stat buf_f2; if (name_f1 == NULL || name_f2 == NULL) { /* Invalid input parameters */ perror("INVALID FNAMES\t"); return (-1); } if (stat(name_f1, &buf_f1) != 0 || stat(name_f2, &buf_f2) != 0) { /* Stat fails */ char emsg[255]; sprintf(emsg, "STAT() ERROR: %s %s\t", name_f1, name_f2); perror(emsg); return (-1); } if (buf_f1.st_size != buf_f2.st_size) { /* File have different sizes */ return (1); } /* Files have the same size, function exec. is continued */ num_blocks = (buf_f1.st_size / BLOCK_SIZE) + 1; num_tsp = (num_blocks / NUM_THREADS) + 1; cursor = 0; for (tsp_iter = 0; tsp_iter < num_tsp; tsp_iter++) { loop_res = 0; /* Create threads array for this spawn */ tsp_threads = malloc(NUM_THREADS * sizeof(*tsp_threads)); if (tsp_threads == NULL) { perror("TSP_THREADS ALLOC FAILURE\t"); return (-1); } /* Create arguments for every thread in the current spawn */ tsp_threads_args = malloc(NUM_THREADS * sizeof(*tsp_threads_args)); if (tsp_threads_args == NULL) { perror("TSP THREADS ARGS ALLOCA FAILURE\t"); return (-1); } /* Initialize arguments and create threads */ for (tsp_threads_iter = 0; tsp_threads_iter < NUM_THREADS; tsp_threads_iter++) { if (cursor >= buf_f1.st_size) { break; } tsp_threads_args[tsp_threads_iter].name_f1 = name_f1; tsp_threads_args[tsp_threads_iter].name_f2 = name_f2; tsp_threads_args[tsp_threads_iter].cursor = cursor; thread_c_res = pthread_create( &tsp_threads[tsp_threads_iter], NULL, check_block_dup, (void*)&tsp_threads_args[tsp_threads_iter]); if (thread_c_res != 0) { perror("THREAD CREATION FAILURE"); return (-1); } cursor+=BLOCK_SIZE; } /* Join last threads and get their status */ while (tsp_threads_iter-->0) { void *thread_res = NULL; thread_j_res = pthread_join(tsp_threads[tsp_threads_iter], &thread_res); if (thread_j_res != 0) { perror("THREAD JOIN FAILURE"); return (-1); } if (strcmp((char*)thread_res, "notdup")==0) { loop_res++; /* Closing other threads and exiting by condition * from loop. */ while (tsp_threads_iter-->0) { pthread_cancel(tsp_threads[tsp_threads_iter]); } } } free(tsp_threads); free(tsp_threads_args); if (loop_res > 0) { break; } } return (loop_res > 0) ? 1 : 0; } The function works fine (at least for what I've tested). Still, some guys from #C (freenode) suggested that the solution is overly complicated, and it may perform poorly because of parallel reading on hddisk. What I want to know: Is the threaded approach flawed by default ? Is fseek() so slow ? Is there a way to somehow map the files to memory and then compare them ?

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