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  • viewing the updated data in a file

    - by benjamin button
    If i have file for eg: a log file created by any background process on unix, how do i view the data that getting updated each and every time. i know that i can use tail command to see the file.but let's say i have used tail -10 file.txt it will give the last 10 lines.but if lets say at one time 10 lines got added and at the next instance it has been added 2 lines. now from the tail command i can see previous 8 lines also.i don't want this.i want only those two lines which were added. In short i want to view only those lines which were appended.how can i do this?

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  • ping to web server from iphone

    - by Sreelal
    Hi , I am developing an aplication which needs to download some data from webserver.So i need to first ping to the web server to check whether the service is available after checking the internet connectivity .I used the following code to check server availability ` BOOL success = NO; const char *host_name = [@"http://192.168.1.7:8080/TestWeb/webresources/" cStringUsingEncoding:NSASCIIStringEncoding]; SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(NULL, host_name); SCNetworkReachabilityFlags flags; success = SCNetworkReachabilityGetFlags(reachability, &flags); BOOL isAvailable = success && (flags & kSCNetworkFlagsReachable) && !(flags & kSCNetworkFlagsConnectionRequired); return isAvailable; ` where my server is uploaded locally.But this code always return an invalid result,but it works correctly if i gave some exixting sites like google.com.Please let me know whats i am doing wrong..

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  • Code Golf: Banknote calculator

    - by paxdiablo
    This question was posted by a C beginner and it was an exercise to calculate, given a dollar value input by the user, the minimum number of bills (or banknotes, depending on your locale) needed to reach that dollar value. So, if the user entered 93, the output would be: $20 bills = 4 $10 bills = 1 $5 bills = 0 $1 bills = 3 Finally succumbing to the phenomenon (it's a slow day here), I thought this would be ripe for a game of Code Golf. For fairness, the input prompt needs to be (note the "_" at the end is a space): Enter a dollar amount:_ I think I've covered all the bases: no identical question, community wiki. I won't be offended if it gets shut down though - of course, I'll never be able to complain about these types of questions again, for fear of being labelled a hypocrite :-) Okay, let's see what you can come up with. Here's a sample run: Enter a dollar amount: 127 $20 bills = 6 $10 bills = 0 $5 bills = 1 $1 bills = 2

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  • Dynamic case statement in bash

    - by infra.user
    Hi folks, I'm trying to figure out how to create a dynamic case statement in a bash script. For example, let's say I have the output of an awk statement with the following contents red green blue In this scenario, the output can change at any time. I'm trying to then execute different logic if a value is included in this awk output. So if the data above is in $list, then I'd conceptually like to do something like: case "${my_var}" in $list) ..... something_else) ..... esac I'm trying to use this to build a dynamic custom tab completion function (see http://www.debian-administration.org/article/An_introduction_to_bash_completion_part_2 for some background). Any ideas? Thanks.

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  • Distributed transactions

    - by javi
    Hello! I've a question regarding distributed transactions. Let's assume I have 3 transaction programs: Transaction A begin a=read(A) b=read(B) c=a+b write(C,c) commit Transaction B begin a=read(A) a=a+1 write(A,a) commit Transaction C begin c=read(C) c=c*2 write(A,c) commit So there are 5 pairs of critical operations: C2-A5, A2-B4, B4-C4, B2-C4, A2-C4. I should ensure integrity and confidentiality, do you have any idea of how to achieve it? Thank you in advance!

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  • Implementing a Stack using Test-Driven Development

    - by devoured elysium
    I am doing my first steps with TDD. The problem is (as probably with everyone starting with TDD), I never know very well what kind of unit tests to do when I start working in my projects. Let's assume I want to write a Stack class with the following methods(I choose it as it's an easy example): Stack<T> - Push(element : T) - Pop() : T - Seek() : T - Count : int - IsEmpty : boolean How would you approch this? I never understood if the idea is to test a few corner cases for each method of the Stack class or start by doing a few "use cases" with the class, like adding 10 elements and removing them. What is the idea? To make code that uses the Stack as close as possible to what I'll use in my real code? Or just make simple "add one element" unit tests where I test if IsEmpty and Count were changed by adding that element? How am I supposed to start with this?

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  • Simple VM That allows booting from folder or disk

    - by None
    I was wondering if there was a very simple and free virtual machine that would allow you to boot from a folder or disk image that couldn't damage my hard disk. I am using a MacBook and am looking into operating system programming. I found a tutorial on the internet that looked promising (http://www.viralpatel.net/taj/tutorial/hello_world_bootloader.php). I want to try this but using a VM instead of actually booting from a disk. If I made a folder or disk image containing the boot.bin file and wanted to try the OS I made (while booting from a folder or disk image, not a disk), is there a VM that would let me do it? I have no previous experience with virtual machines. I also want to be sure my hard disk would not be damaged.

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  • How can I click a button behind a transparent UIView?

    - by Sean Clark Hess
    Let's say we have a view controller with one sub view. the subview takes up the center of the screen with 100 px margins on all sides. We then add a bunch of little stuff to click on inside that subview. We are only using the subview to take advantage of the new frame ( x=0, y=0 inside the subview is actually 100,100 in the parent view). Then, imagine that we have something behind the subview, like a menu. I want the user to be able to select any of the "little stuff" in the subview, but if there is nothing there, I want touches to pass through it (since the background is clear anyway) to the buttons behind it. How can I do this? It looks like touchesBegan goes through, but buttons don't work.

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  • Does a multithreaded crawler in Python really speed things up?

    - by beagleguy
    Was looking to write a little web crawler in python. I was starting to investigate writing it as a multithreaded script, one pool of threads downloading and one pool processing results. Due to the GIL would it actually do simultaneous downloading? How does the GIL affect a web crawler? Would each thread pick some data off the socket, then move on to the next thread, let it pick some data off the socket, etc..? Basically I'm asking is doing a multi-threaded crawler in python really going to buy me much performance vs single threaded? thanks!

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  • Changing the cursor in asp.net

    - by Bob Avallone
    I want to change the cursor to an hourglass in my asp.net application to let my users know that the process is running. I searched for an answer and was advised to use javascript as follows. 1) Add this javascript function hourglass() { document.body.style.cursor = "wait"; } 2) then in my code in the page load event: btnImport.Attributes.Add("onclick", "javascript: hourglass();"); When btnImport is the button they click on However this does not work. But if I add an alert to the hourglass function. it does work. Is there some way to get this to work without the alert. Thanks in advance. Bob Avallone

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  • Dyanmic crm onSave change the value

    - by jk
    Hi I got one assignment on Dynamic CRM 4. We have one custome entity and it has one attribute called 'Issue Number' this attributes value generated by Plug-in when it save. When form will created meaning onLoad it will display blank value(text box is empty). But now we want to check that number is existing then concate with some random number. For that I wrote following javascript. if((event.Mode == 1) || (event.Mode == 2) ) { var varIssueNumber = crmForm.all.new_issueNumber.DataValue; alert(varIssueNumber); } but it is giving 'null'. Can anybody please let me know how can I get the value of text field? thanks in advance

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  • django 'urlize' strings form tect just like twitter

    - by dana
    heyy there i want to parse a text,let's name it 'post', and 'urlize' some strings if they contain a particular character, in a particular position. my 'pseudocode' trial would look like that: def urlize(post) for string in post if string icontains ('#') url=(r'^searchn/$', searchn, name='news_searchn'), then apply url to the string return urlize(post) i want the function to return to me the post with the urlized strings, where necessary (just like twitter does). i don't understand: how can i parse a text, and search for certain strings? is there ok to make a function especially for 'urlizing' some strings? The function should return the entire post, no matter if it has such kind of strings. is there another way Django offers? Thank you

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  • PhysX Question about Raycasting - Setting the shape masks

    - by sweet tv
    I am trying to make the raycast give me the distance of the terrain and nothing else. But I'm not sure how to use the group Mask Filter. virtual NxShape* raycastClosestShape (const NxRay& worldRay, NxShapesType shapeType, NxRaycastHit& hit, NxU32 groups=0xffffffff, NxReal maxDist=NX_MAX_F32, NxU32 hintFlags=0xffffffff, const NxGroupsMask* groupsMask=NULL, NxShape** cache=NULL) const = 0; \param[in] groups Mask used to filter shape objects. Let's say my terrain is set in group 1. How would I use the function above?

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  • Job conditions conflicting with personal principles on software-development - how much is too much?

    - by Baelnorn
    Sorry for the incoming wall'o'text (and for my probably bad English) but I just need to get this off somehow. I also accept that this question will be probably closed as subjective and argumentative, but I need to know one thing: "how much BS are programmers supposed to put up with before breaking?" My background I'm 27 years old and have a B.Sc. in Computer engineering with a graduation grade of 1.8 from a university of applied science. I went looking for a job right after graduation. I got three offers right away, with two offers paying vastly more than the last one, but that last one seemed more interesting so I went for that. My situation I've been working for the company now for 17 months now, but it feels like a drag more and more each day. Primarily because the company (which has only 5 other developers but me, and of these I work with 4) turned out to be pretty much the anti-thesis of what I expected (and was taught in university) from a modern software company. I agreed to accept less than half of the usual payment appropriate for my qualification for the first year because I was promised a trainee program. However, the trainee program turned out to be "here you got a computer, there's some links on the stuff we use, and now do what you colleagues tell you". Further, during my whole time there (trainee or not) I haven't been given the grace of even a single code-review - apparently nobody's interested in my work as long as it "just works". I was told in the job interview that "Microsoft technology played a central role in the company" yet I've been slowly eroding my congnitive functions with Flex/Actionscript/Cairngorm ever since I started (despite having applied as a C#/.NET developer). Actually, the company's primary projects are based on Java/XSLT and Flex/Actionscript (with some SAP/ABAP stuff here and there but I'm not involved in that) and they've been working on these before I even applied. Having had no experience either with that particular technology nor the framework nor the field (RIA) nor in developing business scale applications I obviously made several mistakes. However, my boss told me that he let me make those mistakes (which ate at least 2 months of development time on their own) on purpose to provide some "learning experience". Even when I was still a trainee I was already tasked with working on a business-critical application. On my own. Without supervision. Without code-reviews. My boss thinks agile methods are a waste of time/money and deems putting more than one developer on any project not efficient. Documentation is not necessary and each developer should only document what he himself needs for his work. Recently he wanted us to do bug tracking with Excel and Email instead of using an already existing Bugzilla, overriding an unanimous decision made by all developers and testers involved in the process - only after another senior developer had another hour-long private discussion with him he agreed to let us use the bugtracker. Project management is basically not present, there are only a few Excel sheets floating around where the senior developer lists some things (not all, mind you) with a time estimate ranging from days to months, trying to at least somehow organize the whole mess. A development process is also basically not present, each developer just works on his own however he wants. There are not even coding conventions in the company. Testing is done manually with a single tester (sometimes two testers) per project because automated testing wasn't given the least thought when the whole project was started. I guess it's not a big surprise when I say that each developer also has his own share of hundreds of overhours (which are, of course, unpaid). Each developer is tasked with working on his own project(s) which in turn leads to a very extensive knowledge monopolization - if one developer was to have an accident or become ill there would be absolutely no one who could even hope to do his work. Considering that each developer has his own business-critical application to work on, I guess that's a pretty bad situation. I've been trying to change things for the better. I tried to introduce a development process, but my first attempt was pretty much shot down by my boss with "I don't want to discuss agile methods". After that I put together a process that at least resembled how most of the developers were already working and then include stuff like automated (or at least organized) testing, coding conventions, etc. However, this was also shot down because it wasn't "simple" enought to be shown on a business slide (actually, I wasn't even given the 15 minutes I'd have needed to present the process in the meeting). My problem I can't stand working there any longer. Seriously, I consider to resign on monday, which still leaves me with 3 months to work there due to the cancelation period. My primary goal since I started studying computer science was being a good computer scientist, working with modern technologies and adhering to modern and proven principles and methods. However, the company I'm working for seems to make that impossible. Some days I feel as if was living in a perverted real-life version of the Dilbert comics. My question Am I overreacting? Is this the reality each graduate from university has to face? Should I betray my sound principles and just accept these working conditions? Or should I gtfo of there? What's the opinion of other developers on this matter. Would you put up with all that stuff?

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  • Actionscript 2.0, load images into array

    - by incrediman
    I need to load an external image into an array. Let's say the image is http://sstatic.net/so/img/logo.png I'm using AS2 - I do not have the option of using AS3. Any idea what to do? I'm able to load the image just fine into a movieclip in _root (below), but not into an array. var loader:MovieClipLoader = new MovieClipLoader(); loader.loadClip("http://sstatic.net/so/img/logo.png",_root.mcOnTheStage); Like is there some way to make an array ov MC's that I can load the images into?

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  • Does GIT have evil twin issues?

    - by Senthil A Kumar
    In ClearCase evil twin occurs when two files are found with the same name in two different versions of the directory, and If the element OIDs are different but the names are the same. In GIT the SHA1 id is always unique and file with same name always have different SHA1 id’s. We don’t have a concept of Evil twins, but there are likely cases where there is chance for 2 or more developers creating a file with different contents with same filename in the same directory. During merge, when both files are completely different, there are chances of the developers to keep his changes alone and leave other changes resulting in code loss. Can anyone let me know if there will be issues in GIT similar to ClearCase or sine each SHA1 id is unique there won't be any Evil twin issues in GIT.

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  • Gradle java.util.logging.Logger output in unit tests

    - by Misha Koshelev
    Dear All: Sorry this is probably a very simple question. I am using gradle http://www.gradle.org/ for my development environment. It works quite well! I have written a simple unit test that uses HtmlUnit and my own package. For my own package, I use java.util.Logger. HtmlUnit seems to use commons logging: http://htmlunit.sourceforge.net/logging.html I would like to see console output of my logging messages from java.util.Logger However, it seems that even messages at the info level are not displayed in my Unit Test Results GUI (System.err link), although the HtmlUnit messages are all displayed. Please let me know if you have suggestions. Thank you! Misha

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  • php mkdir windows relative path

    - by Vish
    Hi, Want to create a directory on windows from a PHP script. My script is in www/Test directory of Apache and want to create a folder(fold1) inside www/downloads directory. Inside the script, using, $dirName = "../downloads/fold1"; mkdir("{$dirName}"); If we use the full path of dirName like C:\Apache\www\downloads\fold1, it works fine. But want to use relative path since this code will be sent to the client. Please let me know. Thanks, Vish.

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  • Android back button does not restart activity?

    - by Chris
    My app intiates an activity. On the click of a button, the app opens up the browser with a webpage. When I hit the back button, it comes back to my initial activity screen, but does not resume or restart the activity. When I put all the layout code and activity code in onResume instead of onCreate, the activity gets restarted. My question is whether this is the right way to go about it? Can I use onResume to draw my layout and initiate the activity, or is this poor design? When the browser fires up, does the initial activity forget its layout? Please let me know what you suggest. Thanks Chris

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  • Password Protected Wordpress MU

    - by HollerTrain
    I have a MU site related to Doctors and they will be publishing information that I cannot let outside sources and robots view. Is there a way that when you go to the main domain url, it shows a user/pass login for WP. I would set up the user/pass in the backend. Then they would login, then be able to view the website? I can't have it load up for anyone, I need the website to be password protected to even view the website in general. I know I can use .htaccess to have a user/pass, but it would be ideal to use the user/pass generated by WP so I don't have to mess with code when I create a user. Any help would be greatly appreciated.

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  • Java NIO SocketChannel writing problem

    - by Nilesh
    I am using Java NIO's SocketChannel to write : int n = socketChannel.write(byteBuffer); Most of the times the data is sent in one or two parts; i.e. if the data could not be sent in one attemmpt, remaining data is retried. The issue here is, sometimes, the data is not being sent completely in one attempt, rest of the data when tried to send multiple times, it occurs that even after trying several times, not a single character is being written to channel, finally after some time the remaning data is sent. What could be the cause of such behaviour? Could external factors such as RAM, etc cause the hindarance? Please help me solve this issue. If any other information is required please let me know. Thanks

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  • Install TurboGears on windows xp

    - by coder
    I've been trying to get TurboGears installed on Windows by following this site. I've installed virtualenv but when I execute the command "virtualenv --no-site-packages testproj", I get the following message: New python executable in testproj\Scripts\python.exe Traceback (most recent call last): File "C:\Python26\Scripts\virtualenv-script.py", line 8, in load_entry_point('virtualenv==1.4.5', 'console_scripts', 'virtualenv')() File "C:\Python26\lib\site-packages\virtualenv-1.4.5-py2.6.egg\virtualenv.py", line 529, in main use_distribute=options.use_distribute) File "C:\Python26\lib\site-packages\virtualenv-1.4.5-py2.6.egg\virtualenv.py", line 612, in create_environment site_packages=site_packages, clear=clear)) File "C:\Python26\lib\site-packages\virtualenv-1.4.5-py2.6.egg\virtualenv.py", line 837, in install_python stdout=subprocess.PIPE) File "C:\Python26\lib\subprocess.py", line 621, in __init__ errread, errwrite) File "C:\Python26\lib\subprocess.py", line 830, in _execute_child startupinfo) WindowsError: [Error 14001] This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem Can someone help me debug this ? If any one knows a better tutorial to install turbogears, please let me know.

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  • How to protect compiled Java classes?

    - by Registered User
    I know, many similar questions has been asked here. I am not asking if I can protect my compiled Java class - because obviously you will say 'no you can't'. I am asking what is the best known method of protecting Java classes against de-compiling? If you aware of any research or academic paper in this field please do let me know. Also if you have used some methods or software please share you experience? Any kind of information will be very useful. Thank you.

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  • PHP Line Indentation

    - by Tower
    Hi, I'm curious to know, how many spaces of indentation do you prefer in PHP code? function one() { $one; function space() { $space; } } function two() { $two; function spaces() { $spaces; } } function three() { $three; function spaces() { $spaces; } } function four() { $four; function spaces() { $spaces; } } Let's not make multiple answers for same identation, but use the +1 for answers that fit your preferences.

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  • Should I worry about reigning in namespace number/length/scope?

    - by Jay
    I've recently reorganized a solution-in-progress from 24 projects to 4. To keep the copious files organized in the "main" project, things are in folders in folders in folders. I think I've preserved a logical, discoverable arrangement of the solution content. As a result, of course, I end up with namespaces like AppName.DataAccess.NHibernate.Fluent.Mappings. Is there any compelling reason that I should care about flattening out the namespace hierarchy when my project has a somewhat deeply nested folder structure? (I am not concerned about resolving or managing using directives; I let ReSharper do all the heavy lifting here.)

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