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• Obtaining Android Public Map API Key

  - by TheHighLifeSon

  I have been trying to obtain a public map api key for my Android app. However the public key that I receive from Google does not work. I have been using the following steps: Obtaining Release Public Map API Key 1.Obtain Private Key: Use Export of Eclipse to sign release application and create new keystore 2.Obtain MD5 certificate: using alias and keystore set up use keytool in Java directory: keytool -list -alias poly_alias -keystore copy MD5 certificate 3.Obtain API Map Key: Visit http://code.google.com/android/maps-api-signup.html and enter MD5 certificate copy key 4.Use New Map API Key: insert new map key for string in strings.xml for string mapApiKey Does anyone have any suggestions on what I am doing wrong?

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• Does the facebook API allow you to tag pictures?

  - by devcity

  As the title states, does the facebook API allow developers to write an app that will automatically tag pictures? Or is that outside of the scope?

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• Website Content via remote mysql or API for clients

  - by Kannan

  I would like to know whether there will be problem for shared hosting/vps/dedicated users if they request content via remote mysql or via http API. ? What will be issues if they make every request to production server for delivery of the website articles along with image urls etc. Will it cause disk wait on shared/vps/dedicated hosting users ? Will both remotemysql or http api or curl cause high CPU usage, I/O wait or Memory usage ? What should be best for speed remote mysql or http web api ? or any alternatives ? Thanku Kannan

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• API server not function ["The connection has been reset"]

  - by Miguel Beltrán

  I'm having some troubles with one of my servers. I've done an application with two servers, one the frontend that grabs the data of server API (Ubuntu server). Well, yesterday had a lot of visits and the API server stop functioning but: -I can do stuff in MySQL by SSH. -The memory usage is ok. -The logs are ok. -The bandwitch usage is ok. -If i restart the server or Apache2, function by some time (3-4 minutes). And the most important i think if i tries to access to API (Is rest-style with http) it puts me the Firefox error "The connection has been reset". I'd tried: -Restart the server -Restart Apache2 -Restart MySQL -Viewed the logs of Apache2/MySQL I don't know too much about systems so i don't know what to do more.

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• Team City Backup from Rest API doesn't backup

  - by ChrisFletcher

  I'm using the REST API in Team City 6.5 to request a backup is created as follows: http://teamcity:8111/httpAuth/app/rest/server/backup?includeConfigs=true&includeDatabase=true&includeBuildLogs=true&fileName=filename as specified in the documentation here: http://confluence.jetbrains.net/display/TW/REST+API+Plugin#RESTAPIPlugin-DataBackup The problem is that it simply returns "idle", as does the backup status call and no backup appears. I can backup fine from the web interface and I can return a list of users from the REST API without issue also. I'm starting to suspect there is some sort of permission or config option but I can't find one.

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• iPad receiving memory warning with low memory use

  - by Fer

  I have an UIWebKit with a HTML, this HTML have several images and text, but just displaying it gives me the memory warning. So I did some tests: The same HTML with different images, fullsize, and after the same images but reduced 50% from it's original size, for the 50% reduced images, I went to preview and reduced all images in 50% The surprising part is the 50% test, you can see that even with 16 images, the memory peak is 4.90MB. That's really surprising. Notice that these values are not always the same, they change but there's not a huge difference between the tests. In the 50% issue, in the 8 and 16 images, although the memory is low, sometimes a memory warning appears, but the performance enhance is noticeable compared to the full size images standing still = memory after scrolling all article 1 Image = [standing still 5MB] [rotating 5.6MB] 2 Images = [standing still 6.99MB] [rotating 7.7MB] 3 Images = [standing still 9.04MB] [rotating 10.9MB] 4 Images = [standing still 10.89MB] [rotating 13.20MB] 8 Images = [standing still 23.14MB] [rotating 25.20MB] (sometimes crashes) 16 Images = [standing still 27.14MB and app crashes] 50% 1 Image = [standing still 3.2MB] [rotating 3.67MB] 2 Image = [standing still 3.2MB] [rotating 3.70MB] 3 Image = [standing still 3.3MB] [rotating 3.79MB] 4 Image = [standing still 3.3MB] [rotating 3.80MB] 8 Images = [standing still 4.29MB] [rotating 4,63MB] (sometimes crashes) 16 Images = [standing still 4.79MB] [rotating 4,90MB] (sometimes crashes) My question is: The app sometimes crashed with 16 small images. Why? The memory was much lower. What is the limit of memory use? These numbers are helpful if you also tell us the maximum. But, the maximum seemed different with the 50% size images. 13.2MB works for large images and 3.8 for small images. Anything higher sometimes crashes. That makes no sense.

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• java distributed cache for low latency, high availability

  - by Shahbaz

  I've never used distributed caches/DHTs like memcached, jboss cache, ehcache, etc. I'm wondering which, if any, is appropriate for my use. First, I'm not doing web applications (as most of these project seem to be geared towards web apps). I write servers (Order Management Systems actually) for financial trading firms. The servers themselves are not too complicated. They need to receive information (market data, orders, executions, etc.) rout them to their destination while possibly transforming some of these messages. I am looking at these products to solve the following problems: * Safe repository of the state of the server. I'd rather build the logic of my application as a bunch of transformers (similar to Apache Camel) and store the state in a 'safe' place * This repository should be distributed: in case one of these data stores crashes, one or two more should be up and I should be able to switch to them seamlessly * This repository should be fast. Single digits milliseconds count here, in other words, systems which consume/process this data are automated systems, not humans clicking on links. This system needs to have high-throughput and low latency. By sending my data outside the process, I am necessarily slowing performance, but I am trying to balance absolute raw speed and absolute protection of data. * This repository should be safe. Similar to the point about several on-line backups, this system needs to write data to disk (potentially more than one disk). I'd really like to stop writing my own 'transaction servers.' Am I correct to be looking into projects such as jboss cache, ehcache, etc.? Thanks

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• Suppress task switch keys (winkey, alt-tab, alt-esc, ctrl-esc) using low-level keyboard hook

  - by matt

  I'm trying to suppress task switch keys (such as winkey, alt-tab, alt-esc, ctrl-esc, etc.) by using a low-level keyboard hook. I'm using the following LowLevelKeyboardProc callback: IntPtr HookCallback(int nCode, IntPtr wParam, ref KBDLLHOOKSTRUCT lParam) { if (nCode >= 0) { bool suppress = false; // Suppress left and right windows keys. if (lParam.Key == VK_LWIN || lParam.Key == VK_RWIN) suppress = true; // Suppress alt-tab. if (lParam.Key == VK_TAB && HasAltModifier(lParam.Flags)) suppress = true; // Suppress alt-escape. if (lParam.Key == VK_ESCAPE && HasAltModifier(lParam.Flags)) suppress = true; // Suppress ctrl-escape. /* How do I hook CTRL-ESCAPE ? */ // Suppress keys by returning 1. if (suppress) return new IntPtr(1); } return CallNextHookEx(HookID, nCode, wParam, ref lParam); } bool HasAltModifier(int flags) { return (flags & 0x20) == 0x20; } However, I'm at a loss as to how to suppress the CTRL-ESC combination. Any suggestions? Thanks.

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• Replace low level web-service reference call transport with custom one

  - by hoodoos

  I'm not sure if title sounds right actually, so I will give more explanation here. I will begin from very beginning :) I'm using c# and .net for my development. I have an application that makes requests to some soap web-service and for each user request it produces 3 to 10 requests for web-service, they should all run async to finish in one time, so I use Async method of the web-service generated reference and then wait for result on callback. But it seems like it starts a thread (or takes it from pool) for every async call I make, so if I have 10 clients I got to spawn 30 to 100 threads and it sounds terrible even for my 16 cores server :) So i wanted to replace low level transport implementation with my own which uses non-blocking sockets and can handle at least 50 sockets run parallel in one thread with not much overhead. But I actually dunno where to put my override best. I analyzed System.Web.Services.Protocols.SoapHttpClientProtocol class and see that it has some GetWebRequest method which I actually could use. If only I could somehow interupt the object it creates and get a http request with all headers and body from there and then send it with my own sockets.. Any ideas what approach to use? Or maybe there's something built in the framework I can use?

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• Android Compass orientation on unreliable (Low pass filter)

  - by madsleejensen

  Hi all Im creating an application where i need to position a ImageView depending on the Orientation of the device. I use the values from a MagneticField and Accelerometer Sensors to calculate the device orientation with SensorManager.getRotationMatrix(rotationMatrix, null, accelerometerValues, magneticFieldValues) SensorManager.getOrientation(rotationMatrix, values); double degrees = Math.toDegrees(values[0]); My problem is that the positioning of the ImageView is very sensitive to changes in the orientation. Making the imageview constantly jumping around the screen. (because the degrees change) I read that this can be because my device is close to things that can affect the magneticfield readings. But this is not the only reason it seems. I tried downloading some applications and found that the "3D compass" application remains extremely steady in its readings, i would like the same behavior in my application. I read that i can tweak the "noise" of my readings by adding a "Low pass filter", but i have no idea how to implement this (because of my lack of Math). Im hoping someone can help me creating a more steady reading on my device, Where a little movement to the device wont affect the current orientation. Right now i do a small if (Math.abs(lastReadingDegrees - newReadingDegrees) > 1) { updatePosition() } To filter abit of the noise. But its not working very well :)

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• Low Level Console Input

  - by Soulseekah

  I'm trying to send commands to to the input of a cmd.exe application using the low level read/write console functions. I have no trouble reading the text (scraping) using the ReadConsole...() and WriteConsole() functions after having attached to the process console, but I've not figured out how to write for example "dir" and have the console interpret it as a sent command. Here's a bit of my code: CreateProcess(NULL, "cmd.exe", NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi); AttachConsole(pi.dwProcessId); strcpy(buffer, "dir"); WriteConsole(GetStdHandle(STD_INPUT_HANDLE), buffer, strlen(buffer), &charRead, NULL); STARTUPINFO attributes of the process are all set to zero, except, of course, the .cb attribute. Nothing changes on the screen, however I'm getting an Error 6: Invalid Handle returned from WriteConsole to STD_INPUT_HANDLE. If I write to (STD_OUTPUT_HANDLE) I do get my dir written on the screen, but nothing of course happens. I'm guessing SetConsoleMode() might be of help, but I've tried many mode combinations, nothing helped. I've also created a quick console application that waits for input (scanf()) and echoes back whatever goes in, didn't work. I've also tried typing into the scanf() promp and then peek into the input buffer using PeekConsoleInput(), returns 0, but the INPUT_RECORD array is empty. I'm aware that there is another way around this using WriteConsoleInput() to directly inject INPUT_RECORD structured events into the console, but this would be way too long, I'll have to send each keypress into it. I hope the question is clear. Please let me know if you need any further information. Thanks for your help.

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• iPhone: Low memory crash...

  - by MacTouch

  Once again I'm hunting memory leaks and other crazy mistakes in my code. :) I have a cache with frequently used files (images, data records etc. with a TTL of about one week and a size limited cache (100MB)). There are sometimes more then 15000 files in a directory. On application exit the cache writes an control file with the current cache size along with other useful information. If the applications crashes for some reason (sh.. happens sometimes) I have in such case to calculate the size of all files on application start to make sure I know the cache size. My app crashes at this point because of low memory and I have no clue why. Memory leak detector does not show any leaks at all. I do not see any too. What's wrong with the code below? Is there any other fast way to calculate the total size of all files within a directory on iPhone? Maybe without to enumerate the whole contents of the directory? The code is executed on the main thread. NSUInteger result = 0; NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSDirectoryEnumerator *dirEnum = [[[NSFileManager defaultManager] enumeratorAtPath:path] retain]; int i = 0; while ([dirEnum nextObject]) { NSDictionary *attributes = [dirEnum fileAttributes]; NSNumber* fileSize = [attributes objectForKey:NSFileSize]; result += [fileSize unsignedIntValue]; if (++i % 500 == 0) { // I tried lower values too [pool drain]; } } [dirEnum release]; dirEnum = nil; [pool release]; pool = nil; Thanks, MacTouch

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• Low Throughput on Windows Named Pipe Over WAN

  - by MichaelB76

  I'm having problems with low performance using a Windows named pipe. The throughput drops off rapidly as the network latency increases. There is a roughly linear relationship between messages sent per second and round trip time. It seems that the client must ack each message before the server will send the next one. This leads to very poor performance, I can only send 5 (~100 byte) messages per second over a link with an RTT of 200 ms. The pipe is asynchronous, using multiple overlapped write operations (and multiple overlapped reads at the client end), but this is not improving throughput. Is it possible to send messages in parallel over a named pipe? The pipe is created using PIPE_TYPE_MESSAGE, would PIPE_READMODE_BYTE work better? Is there any other way I can improve performance? This is a deployed solution, so I can't simply replace the pipe with a socket connection (I've read that Windows named pipe aren't recommended for use over a WAN, and I'm wondering if this is why). I'd be grateful for any help with this matter.

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• Brick-level backup and restore with exchange 2007

  - by V. Romanov

  In the company I'm working for, we use exchange 2007 and backup it using netbackup. The backup is a daily complete backup of the information store and the direct corollary of this is that restores are hell. We need to restore the entire information store (over 80 gb), somehow merge it back with the original store, which causes problems. Alternatively, we tried using QUEST software to emulate exchange and restore mails from the emulation. However, this proved unreliable. The main problem with this entire situation is that we have to restore the whole information store and walk it through the restore process manually, and its quite absurd to be forced spend more than a day restoring even one erased email. (we have erased mail retention, but sometimes we need to restore older mail). in comparison, back in the day of XCH2003 and backupexec 12, we had complete brick level backup and restore at the push of a button. I've spoken to one of our chief sysadmins who claimed that the official response from microsoft to this issue was - "sorry guys, no brick level backup in XCH2007" which sounds ridiculous to me. Can someone shed some light on the situation? How do you backup your exchange2007 stores? Can you restore a single email quickly? A mailbox, perhaps?

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• IIS 8 URL Redirect on site level

  - by jackncoke

  I am trying to do a simple 301 perm redirect to another url in IIS 8. The end results would be if i navigated to domain2.com i would end up on domain1.com. We are moving from IIS 6 to a new server and have aprox 600+ sites that will be configured on this IIS 8 box. All of these sites run a property CMS and are looking at the same directory for source code. In IIS 6 i would just go to the Home directory tab of each site and check the box that says "Permanent Redirect" and provide a URL. With IIS 8 there is "HTTP Redirect" and this looks like it would do the trick but it is being applied to all the sites in IIS 8. Not on the site level like it use to be in IIS 6. I also looked into URL Rewriting module for IIS 8 but it seems to take rules in the style of a firewall and i am not sure if i could effectly create rules that would cater to 600+ sites. I am looking for the easiest way to have redirects on my site level so that that customers with multiple domains can have there sites redirect to there main domain for seo purposes. I feel like this was so easily achieved in IIS 6 that i must be overlooking something in the new version.

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• Numbered paragraphs in Word 2007

  - by Kit

  I have the following styles defined in Word 2007. They all have outline levels 1-6. They also correctly show up in the Table of Contents (not all, I only set the TOC up to Level 3). 1 Heading 1 1.1 Heading 2 1.1.1 Heading 3 1.1.1.1 Heading 4 1.1.1.1.1 Heading 5 1.1.1.1.1.1 Heading 6 This is what I want 1 Heading 1 1.1 Body text under Heading Level 1 1.2 Body text under Heading Level 1 2 Heading 1 2.1 Heading 2 2.1.1 Body text under Heading Level 2 2.1.2 Body text under Heading Level 2 2.1.3 Body text under Heading Level 2 2.2 Heading 2 2.2.1 Body text under Heading Level 2 2.2.2 Body text under Heading Level 2 How do I make two list sequences link to each other? Here's a {fill in the blanks} illustration: {section number} Heading 1 {section number}.{clause number} Body text under Heading Level 1 {section number}.{clause number} Body text under Heading Level 1 The example above should expand to: 1 Heading 1 1.1 Body text under Heading Level 1 1.2 Body text under Heading Level 1 Another example: {section number} Heading 1 {section number}.{subsection number} Heading 2 {section number}.{subsection number}.{clause number} Body text under Heading Level 2 {section number}.{subsection number}.{clause number} Body text under Heading Level 2 should expand to: 2 Heading 1 2.1 Heading 2 2.1.1 Body text under Heading Level 2 2.1.2 Body text under Heading Level 2 2.1.3 Body text under Heading Level 2 The numbered body text paragraphs shouldn't show up the Table of Contents. I couldn't find the right way to do that, whether in multilevel lists, fields, styles, etc. How do I do it right?

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• When to raise domain functional level?

  - by Joel Coel

  We very recently completed a project to retire two old domain controllers running Server 2003 R2. They are now replaced with shiny new 2008 R2 boxes. However, the functional level of the domain has not yet been updated for the 2008 R2 servers, just in the long-shot case of the need for a rollback to the old controllers. I expect to have the all clear to update the domain by next weekend. I also want to note that our desktop clients are still 95% Windows XP. However, we're about to start a project to update our 200 or so clients to Windows 7 before the end of the calendar year. Is there any advantage to holding the domain at the 2003 functional level while we are still supporting more Windows XP than Windows 7, especially given that some of the management stations are still XP? Update: I forgot to mention earlier that we still have a pair of windows 2000 servers (not domain controllers) that support some legacy software. I'm working to replace those, but in the meantime I need to be sure that Windows 2000 can still participate in a 2008 R2 domain.

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• Windows OS level file open event trigger

  - by john

  Colleagues, I have need to run a script/program on certain basic OS level events. In particular when a file in Windows is opened. The open may be read-only or to edit, and may be initiated by a number of means, either from windows explorer (open or ), be selected from a viewing or editing application from the native file chooser, or drag-n-drop into an editing or viewing application. Further, i need the trigger to "hold" the event from completing the action until the runtime on the program has completed. The event handler program may return a pass state, or fail state. If fail state has been returned, then the event must disallow the initially requested action. Lastly, I need to add to the file in question a property or attribute that will contain metadata that will be used by the above event trigger handler program to make a determination as to the pass/fail condition that will ultimately determine if the user is permitted to open the file. Please note that this is NOT a windows event log situation, but one at the OS level file open event. thanks very much for your help. regards, j

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• I have tearing or extremely low fps on fullhd video playback on Ubuntu 12.10 beta 2 , plus 3d gaming is imposible !

  - by digitalcrow

  I have tearing or extremely low fps on fullhd video playback on Ubuntu 12.10 beta 2 , plus 3d gaming is imposible ! I don't know what are you trying to do but seems pretty FAILED to me ! It sucks way too much ! -Plus wifi internet connection stays for 5minutes then no internet ! but wifi connections stays. I've tested ubuntu 12.10 beta 2 64bit with 1) Nvidia geforce gts250 (EXCESSIVE TEARING, 3d games dont change res and have low fps plus bad support on plymouth etc) 2) Ati radeon hd 6450 (Low Fps on full hd video playback , can play hd flash videos)

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• Rally Rest .NET API throws KeyNotFoundException when posting a new defect without required field value

  - by Triet Pham

  I've tried to post a new defect to Rally via Rest .net api by the following code: var api = new RallyRestApi("<myusername>", "<mypassword>", "https://community.rallydev.com"); var defect = new DynamicJsonObject(); defect["Name"] = "Sample Defect"; defect["Description"] = "Test posting defect without required field value"; defect["Project"] = "https://trial.rallydev.com/slm/webservice/1.29/project/5808130051.js"; defect["SubmittedBy"] = "https://trial.rallydev.com/slm/webservice/1.29/user/5797741589.js"; defect["ScheduleState"] = "In-Progress"; defect["State"] = "Open"; CreateResult creationResult = api.Create("defect", defect); But the api throws a weird exception: System.Collections.Generic.KeyNotFoundException was unhandled Message=The given key was not present in the dictionary. Source=mscorlib StackTrace: at System.Collections.Generic.Dictionary`2.get_Item(TKey key) at Rally.RestApi.DynamicJsonObject.GetMember(String name) at Rally.RestApi.DynamicJsonObject.TryGetMember(GetMemberBinder binder, Object& result) at CallSite.Target(Closure , CallSite , Object ) at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0) at Rally.RestApi.RallyRestApi.Create(String type, DynamicJsonObject obj) at RallyIntegrationSample.Program.Main(String[] args) in D:\Projects\qTrace\References\Samples\RallyIntegrationSample\Program.cs:line 24 The problem is when i checked out the trace log file of Rally, it showed exactly what wrong in the posting request: Rally.RestApi Post Response: { "CreateResult": { "_rallyAPIMajor":"1", "_rallyAPIMinor":"29", "Errors":["Validation error: Defect.Severity should not be null"], "Warnings":[] } } Instead of given the proper CreateResult object with according errors information in its property, the Rally Rest .Net Api throws an unexpected exception. Is that a mistake in Rally rest .net api or should i do any extra steps to get the CreatResult seamlessly in case of any errors returned by Rally service? Many thanks for your helps.

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• Using HttpClient with the RightScale API

  - by Ameer Deen

  I'm trying to use the WCF Rest Starter Kit with the RightScale's Login API which seems fairly simple to use. Edit - Here's a blog entry I wrote on using Powershell to consume the API. Edit - Created a generic .NET wrapper for the RightScale API - NRightAPI It's exactly as simple as it looks while using CURL. In order for me to obtain a login cookie all I need to do is: curl -v -c rightcookie -u username:password "https://my.rightscale.com/api/acct/accountid/login?api_version=1.0" And I receive the following cookie: HTTP/1.1 204 No Content Date: Fri, 25 Dec 2009 12:29:24 GMT Server: Mongrel 1.1.3 Status: 204 No Content X-Runtime: 0.06121 Content-Type: text/html; charset=utf-8 Content-Length: 0 Cache-Control: no-cache Added cookie _session_id="488a8d9493579b9473fbcfb94b3a7b8e5e3" for domain my.rightscale.com, path /, expire 0 Set-Cookie: _session_id=488a8d9493579b9473fbcfb94b3a7b8e5e3; path=/; secure Vary: Accept-Encoding However, when I use the following C# code: HttpClient http = new HttpClient("https://my.rightscale.com/api/accountid/login?api_version=1.0"); http.TransportSettings.UseDefaultCredentials = false; http.TransportSettings.MaximumAutomaticRedirections = 0; http.TransportSettings.Credentials = new NetworkCredential("username", "password"); Console.WriteLine(http.Get().Content.ReadAsString()); Instead of a HTTP 204, I get a redirect: You are being <a> href="https://my.rightscale.com/dashboard"redirected <a> How do I get the WCF REST starter kit working with the RighScale API ?

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• Are there Windows API binaries for Subversion or do I have to build SVN to call the API from Windows

  - by JeffH

  I want to call a Subversion API from a Visual Studio 2003 C++ project. I know there are threads here, here, here, and here that tell how to get started with C#.NET on Windows (the consensus seems to be SharpSvn, which I've used easily and successfully on another project) but that's not what I want. I've read the chapter on using APIs in the red-bean book which says: Subversion is primarily a set of C libraries, with header (.h) files that live in the subversion/include directory of the source tree. These headers are copied into your system locations (e.g., /usr/local/include) when you build and install Subversion itself from source. These headers represent the entirety of the functions and types meant to be accessible by users of the Subversion libraries. I'd like to use CollabNet Subversion but there doesn't seem to be API binary downloads, and I'd just as soon not build the whole thing if I can avoid it. Considering another approach, I found RapidSVN's C++ API, but it doesn't appear to offer Windows API binaries either and seems to require building SVN (which I would be willing to do as a last choice if RapidSVN's API is higher-level than the stock SVN offering.) Does calling the API from C++ in Windows have to be this much more work compared to using SharpSvn under .NET, or is there something I haven't found that would help me achieve my goal?

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• System Calls in windows & Native API?

  - by claws

  Recently I've been using lot of Assembly language in *NIX operating systems. I was wondering about the windows domain. Calling convention in linux: mov $SYS_Call_NUM, %eax mov $param1 , %ebx mov $param2 , %ecx int $0x80 Thats it. That is how we should make a system call in linux. Reference of all system calls in linux: Regarding which $SYS_Call_NUM & which parameters we can use this reference : http://docs.cs.up.ac.za/programming/asm/derick_tut/syscalls.html OFFICIAL Reference : http://kernel.org/doc/man-pages/online/dir_section_2.html Calling convention in Windows: ??? Reference of all system calls in Windows: ??? Unofficial : http://www.metasploit.com/users/opcode/syscalls.html , but how do I use these in assembly unless I know the calling convention. OFFICIAL : ??? If you say, they didn't documented it. Then how is one going to write libc for windows without knowing system calls? How is one gonna do Windows Assembly programming? Atleast in the driver programming one needs to know these. right? Now, whats up with the so called Native API? Is Native API & System calls for windows both are different terms referring to same thing? In order to confirm I compared these from two UNOFFICIAL Sources System Calls: http://www.metasploit.com/users/opcode/syscalls.html Native API: http://undocumented.ntinternals.net/aindex.html My observations: All system calls are beginning with letters Nt where as Native API is consisting of lot of functions which are not beginning with letters Nt. System Call of windows are subset of Native API. System calls are just part of Native API. Can any one confirm this and explain.

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• Player & Level class structure in 2D python console game?

  - by Markus Meskanen

  I'm trying to create a 2D console game, where I have a player who can freely move around in a level (~map, but map is a reserved keyword) and interfere with other objects. Levels construct out of multiple Blocks, such as player(s), rocks, etc. Here's the Block class: class Block(object): def __init__(self, x=0, y=0, char=' ', solid=False): self.x = x self.y = y self.char = char self.solid = solid As you see, each block has a position (x, y) and a character to represent the block when it's printed. Each block also has a solid attribute, defining whether it can overlap with other solids or not. (Two solid blocks cannot overlap) I've now created few subclasses from Block (Rock might be useless for now) class Rock(Block): def __init__(self, x=0, y=0): super(Rock, self).__init__(x, y, 'x', True) class Player(Block): def __init__(self, x=0, y=0): super(Player, self).__init__(x, y, 'i', True) def move_left(self, x=1): ... # How do I make sure Player wont overlap with rocks? self.x -= x And here's the Level class: class Level(object): def __init__(self, name='', blocks=None): self.name = name self.blocks = blocks or [] Only way I can think of is to store a Player instance into Level's attributes (self.player=Player(), or so) and then give Level a method: def player_move_left(self): for block in self.blocks: if block.x == self.player.x - 1 and block.solid: return False But this doesn't really make any sense, why have a Player class if it can't even be moved without Level? Imo. player should be moved by a method inside Player. Am I wrong at something here, if not, how could I implement such behavior?

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• Learning AngularJS by Example – The Customer Manager Application

  - by dwahlin

  I’m always tinkering around with different ideas and toward the beginning of 2013 decided to build a sample application using AngularJS that I call Customer Manager. It’s not exactly the most creative name or concept, but I wanted to build something that highlighted a lot of the different features offered by AngularJS and how they could be used together to build a full-featured app. One of the goals of the application was to ensure that it was approachable by people new to Angular since I’ve never found overly complex applications great for learning new concepts. The application initially started out small and was used in my AngularJS in 60-ish Minutes video on YouTube but has gradually had more and more features added to it and will continue to be enhanced over time. It’ll be used in a new “end-to-end” training course my company is working on for AngularjS as well as in some video courses that will be coming out. Here’s a quick look at what the application home page looks like: In this post I’m going to provide an overview about how the application is organized, back-end options that are available, and some of the features it demonstrates. I’ve already written about some of the features so if you’re interested check out the following posts: Building an AngularJS Modal Service Building a Custom AngularJS Unique Value Directive Using an AngularJS Factory to Interact with a RESTful Service Application Structure The structure of the application is shown to the right. The  homepage is index.html and is located at the root of the application folder. It defines where application views will be loaded using the ng-view directive and includes script references to AngularJS, AngularJS routing and animation scripts, plus a few others located in the Scripts folder and to custom application scripts located in the app folder. The app folder contains all of the key scripts used in the application. There are several techniques that can be used for organizing script files but after experimenting with several of them I decided that I prefer things in folders such as controllers, views, services, etc. Doing that helps me find things a lot faster and allows me to categorize files (such as controllers) by functionality. My recommendation is to go with whatever works best for you. Anyone who says, “You’re doing it wrong!” should be ignored. Contrary to what some people think, there is no “one right way” to organize scripts and other files. As long as the scripts make it down to the client properly (you’ll likely minify and concatenate them anyway to reduce bandwidth and minimize HTTP calls), the way you organize them is completely up to you. Here’s what I ended up doing for this application: Animation code for some custom animations is located in the animations folder. In addition to AngularJS animations (which are defined using CSS in Content/animations.css), it also animates the initial customer data load using a 3rd party script called GreenSock. Controllers are located in the controllers folder. Some of the controllers are placed in subfolders based upon the their functionality while others are placed at the root of the controllers folder since they’re more generic:   The directives folder contains the custom directives created for the application. The filters folder contains the custom filters created for the application that filter city/state and product information. The partials folder contains partial views. This includes things like modal dialogs used in the application. The services folder contains AngularJS factories and services used for various purposes in the application. Most of the scripts in this folder provide data functionality. The views folder contains the different views used in the application. Like the controllers folder, the views are organized into subfolders based on their functionality:   Back-End Services The Customer Manager application (grab it from Github) provides two different options on the back-end including ASP.NET Web API and Node.js. The ASP.NET Web API back-end uses Entity Framework for data access and stores data in SQL Server (LocalDb). The other option on the back-end is Node.js, Express, and MongoDB.   Using the ASP.NET Web API Back-End To run the application using ASP.NET Web API/SQL Server back-end open the .sln file at the root of the project in Visual Studio 2012 or higher (the free Express 2013 for Web version is fine). Press F5 and a browser will automatically launch and display the application. Using the Node.js Back-End To run the application using the Node.js/MongoDB back-end follow these steps: In the CustomerManager directory execute 'npm install' to install Express, MongoDB and Mongoose (package.json). Load sample data into MongoDB by performing the following steps: Execute 'mongod' to start the MongoDB daemon Navigate to the CustomerManager directory (the one that has initMongoCustData.js in it) then execute 'mongo' to start the MongoDB shell Enter the following in the mongo shell to load the seed files that handle seeding the database with initial data: use custmgr load("initMongoCustData.js") load("initMongoSettingsData.js") load("initMongoStateData.js") Start the Node/Express server by navigating to the CustomerManager/server directory and executing 'node app.js' View the application at http://localhost:3000 in your browser. Key Features The Customer Manager application certainly doesn’t cover every feature provided by AngularJS (as mentioned the intent was to keep it as simple as possible) but does provide insight into several key areas: Using factories and services as re-useable data services (see the app/services folder) Creating custom directives (see the app/directives folder) Custom paging (see app/views/customers/customers.html and app/controllers/customers/customersController.js) Custom filters (see app/filters) Showing custom modal dialogs with a re-useable service (see app/services/modalService.js) Making Ajax calls using a factory (see app/services/customersService.js) Using Breeze to retrieve and work with data (see app/services/customersBreezeService.js). Switch the application to use the Breeze factory by opening app/services.config.js and changing the useBreeze property to true. Intercepting HTTP requests to display a custom overlay during Ajax calls (see app/directives/wcOverlay.js) Custom animations using the GreenSock library (see app/animations/listAnimations.js) Creating custom AngularJS animations using CSS (see Content/animations.css) JavaScript patterns for defining controllers, services/factories, directives, filters, and more (see any JavaScript file in the app folder) Card View and List View display of data (see app/views/customers/customers.html and app/controllers/customers/customersController.js) Using AngularJS validation functionality (see app/views/customerEdit.html, app/controllers/customerEditController.js, and app/directives/wcUnique.js) More… Conclusion I’ll be enhancing the application even more over time and welcome contributions as well. Tony Quinn contributed the initial Node.js/MongoDB code which is very cool to have as a back-end option. Access the standard application here and a version that has custom routing in it here. Additional information about the custom routing can be found in this post.

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