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• Writing code to be a better programmer

  - by wtfsven

  A while back I heard on a podcast about a site listing "10 applications to write that will make you a better programmer." I'm desperate to find where this is, or at the very least a decent list from someone here. The thing is, I've been writing code for about 8 years now, and it's my passion. Very few things make me happier than getting lost in some C# or Python. But I've spent the last 2 years in a job that doesn't allow me much time to do what I love. Now everyone knows that the best way to keep your coding sword sharp is to use it, and I've noticed recently that mine is getting dull. Does anyone have any suggestions on some simple programs to help flex my coding muscle? I'm one of those odd few who actually likes writing CRUD applications, so stuff like that would be nice, too.

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• Simple RIA backend

  - by Jeremy

  I'm creating a prototype for a java web application. Frontend is a Swing-based java applet. Backend should be a type of web-service, that is called by applet. Backend should run inside a servlet container and should have its own security (username/password) database. I know, that Tomcat has its own user database (realm), but the app should have own. Web-services, in turn, carrying out app logic and database access (via Hibernate). I'm a newbie for a web development and I'm getting lost in a huge amount of the java web frameworks. Even just reading 'introduction' and 'getting started' documents takes a lot of time. So I need an advice which framework(s) are suitable for the task and not very complex for a quick start. Thank you

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• Accessing FILESTREAM from an SQL CLR assembly

  - by superware

  I'm trying to stream FILESTREAM data from an unsafe SQL CLR assembly. The connection string is Data Source=LAPTOP2\SQLEXPRESS;Initial Catalog=test;Integrated Security=True;Enlist=False When creating a new SqlFileStream (inside a SqlTransaction, of course), I'm getting: The request is not supported at OpenSqlFilestream. So I decided to try native OpenSqlFilestream, but then I'm getting an invalid handle (-1) while GetLastWin32Error returns that same: The request is not supported (ERROR_NOT_SUPPORTED). I have also tried SqlContext.WindowsIdentity.Impersonate() with no apparent effect. I couldn't find any documentation referencing this restriction. Is it really unsupported? If it is unsupported, is there a good reason? Does anyone know of a workaround?

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• Extracting script tags from webpage using user script

  - by user1275375

  My userscript has the following code var scrpt=document.getElementsByTagName('script'); i included this to know the number of scripts of each page i access. This works fine with some websites but for some sites i am not getting all the scripts present. I installed the user script in both firefox and chrome the issue is the number of scripts for the same site is different in both browsers. For example when i access this link Help extracting text from html tag with Java and Regex i am getting the number of scripts in firefox as:17 and in chrome as:15 but when i view the page source there are 22 script tags Please help me to slove the problem. I even tried document.scripts but still i get the same result.

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• rails howto compare datetime ?

  - by fenec

  hello, i have games in my sqLite DB with the attribute starting_date( t.date :starting_date). i would like to know all the games that have alreday started so i am using this lines of code: Game.find :all,:conditions=>"starting_date <= #{Date.today}" Game.find_by_sql("SELECT * FROM "games" WHERE (created_at < 2010-05-13)") the result is nill,even though i know that i have games that have already started like this one : #<Game id: 1, team_1_id: 2, team_2_id: 1, status: 2, team_1_points: nil, team_2_points: nil, starting_date: "2010-05-05", winner: 1, sport: "football", country: nil, league: "calcio", created_at: "2010-04-07 00:09:21", updated_at: "2010-05-13 00:57:19"> what am i doing wrong here?

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• JPA atomic query/save for multithreaded app

  - by TofuBeer

  I am in the midst of changing my JPA code around to make use of threads. I have a separate entity manager and transaction for each thread. What I used to have (for the single threaded environment) was code like: // get object from the entity manager X x = getObjectX(jpaQuery); if(x == null) { x = new X(); x.setVariable(foo); entityManager.persist(x); } With that code in the multi threaded environment I am getting duplicate keys since, I assume, getObjectX returns null for a thread, then that thread is swapped out, the next thread calls getObjextX, also getting null, and then both threads will create and persist a new X(). Short of adding in synchronization, is there an atomic way to get/save-if-doesn't-exist a value with JPA or should I rethink my approach EDIT: I am using the latest Eclipselink and MySql 5.1

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• As a programmer what single discovery has given you the greatest boost in productivity?

  - by ChrisInCambo

  This question has been inspired by my recent discovery/adoption of distributed version control. I started using it (mercurial) just because I liked the idea of still being able to make commits at times when I couldn't connect to the central server. I never expected it would give me a large boost in general productivity, but a pleasant side effect I discovered was that making a new clone every time I started a new task and giving that clone a descriptive folder name is extremely effective at keeping me on task resulting is a noticeable productivity increase. So as a programmer what single discovery has given you the greatest boost in productivity? Extra respect for answers which involve tools or practices that aren't so obvious from the outside!

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• Issue in accessing JSON object?

  - by Esh

  Am facing issue in accessing the JSON object : JSON Object am receiving is : {"71":"Heart XXX","76":"No Heart YYYY"} I tried to get the value of 71 and 72 separately and use it ... but am getting some compile time issue as : Syntax error on token ".71", delete this token Code: var map=$("#jsonText").val(); alert(map); var obj=jQuery.parseJSON(map); alert("JSON ::"+obj.71); If am printing obj , am able to view [Object Object] Can any one out there please help me to find the mistake i did ..I know the question above is asked in many threads in SO . Below are the few threads i found , but failed when i attempted to implement it .. jquery json parsing Also tried using the Jquery tutorial given in Jquery JSON Its working fine if the key is a String but getting the above error if its a number ...

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• Problem with url_for in ActionMailer template

  - by macek

  I'm attempting to provide a confirmation link in my user welcome email and I'm getting the following Rails error: Need controller and action! It makes a fuss about this line: <p>Please take a moment to activate your account by going to: <%= link_to confirm_user_url(:id => @user.confirmation_code) %>.</p> In my development.rb environment, I have the following line: config.action_mailer.default_url_options = { :host => "localhost", :port => 3000 } There's no problem with the @user variable. I've tested the email with things like @user.username and @user.confirmation_code. I'm only getting trouble with url_for and named routes like confirm_user_url. When I check my routes with rake routes, confirm_user shows up, so it's not an issue with the named route not existing. I can't seem to figure it out. What gives?

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• Accepted date format changed overnight

  - by Eugene Niemand

  Since yesterday I started encountering errors related to date formats in SQL Server 2008. Up until yesterday the following used to work. EXEC MyStoredProc '2010-03-15 00:00:00.000' Since yesterday I started getting out of range errors. After investigating I discovered the date as above is now being interpreted as "the 3rd of the 15th month" which will cause a out of range error. I have been able to fix this using the following format with the "T". EXEC MyStoredProc '2010-03-15T00:00:00.000' By using this format its working fine. Basically all I'm trying to find out is if there is some Hotfix or patch that could have caused this, as all my queries using the first mentioned formats have been working for months. Also this is not a setting that was changed by someone in the company as this is occurring on all SQL 2005/2008 servers

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• iOS get file size on disk

  - by F2_CMD

  I'm trying to get the size on disk of a file in iOS using Objective C. As of now I've been able to get the actual size of the file and other file information using NSFileManager and then getting the attributes attributesOfItemAtPath:error but not the size on disk. I also tried getting the file size from struct stat but again it doesn't give me size on disk.I tried using NSTask to make a call to du -h but iOS didn't allow me to fork other processes. Any ideas are welcome :) I know this questions is similar to many others but the difference is that I'm trying to do this in iOS and most of the methods used in other systems don't work here. Thanks

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• Unwanted automated creation of new instances of an activity class

  - by Marko

  I have an activity (called Sender) with the most basic UI, only a button that sends a message when clicked. In the onClickListener I only call this method: private void sendSMS(String msg) { PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(this, Sender.class), 0); PendingIntent pi = PendingIntent.getActivity(this, 0, myIntent, 0); SmsManager sms = SmsManager.getDefault(); sms.sendTextMessage("1477", null, msg, pi, null); } This works ok, the message is sent but every time a message is sent a new instance of Sender is started on top of the other. If I call sendSMS method three times, three new instances are started. I'm quite new to android so I need some help with this, I only want the same Sender to be on all the time

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• onPageLoad is not working properly in Firefox Extension Development

  - by Tharaka Deshan

  I am new to Firefox Extension Development and doing my 1st program. Simply I needed to pop up a alert once it loaded the page. My code was like this: var myExtension = { init: function() { if(gBrowser) gBrowser.addEventListener("DOMContentLoaded", this.onPageLoad, false); }, onPageLoad: function(aEvent) { alert("Loaded"); } } window.addEventListener("load", function load(event){ window.removeEventListener("load", load, false); myExtension.init(); },false); But I am getting the alert box for couple of times. Then I found about "#document" and then I added a IF condition: onPageLoad: function(aEvent) { if (aEvent.originalTarget.nodeName == '#document') { alert("Loaded"); } } Unfortunately still I am getting the same. Please advise me on this.

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• Taking out a subpart from Enumerable

  - by sawa

  I often want to take out a subpart from an Enumerable. The subpart is sometimes at the beginning and sometimes the end of the original Enumerable instance, and the length used to specify the subpart is sometimes that of the subpart and sometimes its complement. That gives four possibilities, but I only know how to do three of them. Is there a way to do the fourth one? Getting the first n elements: [1, 2, 3, 4, 5].first(3) #= [1, 2, 3] or [1, 2, 3, 4, 5].take(3) #= [1, 2, 3] Dropping the first n elements: [1, 2, 3, 4, 5].drop(3) #= [4, 5] Getting the last n elements: [1, 2, 3, 4, 5].last(3) #= [3, 4, 5] Dropping the last n elements: [1, 2, 3, 4, 5].some_method(3) #= [1, 2]

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• Logging out of Facebook invalidates offline_access token

  - by Mike Pateras

  I'm getting an offline access token like this: https://graph.facebook.com/oauth/access_token?scope=offline_access&client_id=MYCLIENTID&redirect_uri=MYREDIRECTURI&client_secret=MYSECRET&code=MYCODE obviously the MYCLIENTID and stuff have been changed for the sake of this post. Anyway, as soon as the user logs out of facebook, the key seems to no longer be valid. Am I not requesting offline_access properly (there's still an "expires" value on it, should there be if it is actually getting offline access), or is that just how it works? If it's the latter, how can I get a key that will persist, regardless of if the user logs out of facebook? I'm sure this is possible, because Tweetdeck can still write to Facebook, even though I'm currently logged out.

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• Installing Djnajo/Python on IIS6

  - by Sohrab Hejazi

  We are currently installing the latest version of Django and Python on IIS6. We have followed the instructions on the following site: http://code.djangoproject.com/wiki/DjangoOnWindowsWithIISAndSQLServer We are receiving a 403 error when trying to access our Django application via the IIS server. We have verified the python installation on IIS6 and it is working property. We have also verified the Django installation. Our application runs fine under the built-in Django server, but we are having difficulties getting it to run under IIS. We presume we could be getting errors from "Linking Django to PyISAPIe" section of the instructions provided on the link above. Thank.

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• Hudson - Maven is failing (cannot create /dev/null/.m2) on Tomcat-6 - Gentoo

  - by John

  Hi there. I'm having major issues with getting Hudson up and running on a gentoo server with Tomcat 6. I'm able to deploy Hudson just fine, and I can browse the web-application, configure it and set up builds etc. However, when I try to run a build (in example "clean test" on a Maven2 project) I get this error ERROR: Failed to create /dev/null/.m2 I've google'd and for some it seems to be helping to put -DHUDSON_HOME=/home/hudson and -DMAVEN_HOME=/home/hudson in /etc/init.d/tomcat-6's JAVA_OPTS. However, I've tried that and by doing the same in /etc/conf.d/tomcat-6 , but I'm still getting this error. Has any of you had to deal with this before?

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• Visual Studio 2010 compilation general error c1010070

  - by user1747455

  I wrote a little "hello world" program to test my computer, but when i sompile the program there's an error: ------ Build started: Project: hi, Configuration: Debug Win32 ------ Build started 15/10/2012 22:36:48. InitializeBuildStatus: Touching "Debug\hi.unsuccessfulbuild". Link: hi.vcxproj - D:\MSVS\hi\Debug\hi.exe Manifest: Debug\hi.exe.intermediate.manifest : general error c1010070: Failed to load and parse the manifest. {q~ 0H Build FAILED. Time Elapsed 00:00:02.34 ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== the creepiest thing i think would be that line of "OH"... i wonder if there's any way to solve this...please help. Many thanks. edit: i tried changing the character set into "multi-byte" and turning "embed manifest"(from "manifest tools") off, but it still cant solve the error

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• How to add Ads for my android app using eclipse?

  - by user3896367

  I am trying to add ads to my app but I don't know how I followed the instructions from this site: https://developer.android.com/google/play-services/ads.html I did step 1 and 2 in the getting started column, I imported the google-play-services_libs to my workspace then I referenced it in my app and I added this code in my mainfest: <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> I opened the sample ad and copied this code to my xml: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:ads="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/black" android:gravity="center" android:orientation="vertical" > <com.google.android.gms.ads.AdView android:id="@+id/adView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" ads:adUnitId="@string/ad_unit_id"/> but I am getting this error: The following classes could not be instantiated: - com.google.android.gms.ads.AdView so do you know how to fix this problem and can you tell me what should i write in the java to make in work thanks

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• hg unshelve not working

  - by shanebonham

  Our team is just getting started with Mercurial. One of the first things we've started to play with is hg shelve. Locally, I have no problem shelving changes. It all works perfectly from what I can tell. However, when I try to unshelve, I get the restoring backup files message, but when I run hg diff, there are no changes, and my changes are missing from the code. If i do hg unshelve -i I can see the diff, but again, trying to unshelve seems to have no effect. I've been trying to test it with some very simple changes that shouldn't be a problem in terms of conflicts, e.g. adding a test comment. I should note that I've tried hg unshelve -f after which it says unshelve completed but again, my changes are not restored. Any ideas what I am doing wrong? If it matters: Mercurial Distributed SCM (version 1.5.1+20100405)

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• Checksum fail on visual studio 2010 Trial RTM

  - by Medo

  I'm getting 7790db7d2aac9e1ee8baa34d42988577689c9e7a should be SHA-1: 0x8371f6a8d090063fcc320617e94854374633df3c Am I the only one?

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• Execution plan issue requires reset on SQL Server 2005, how to determine cause?

  - by Tony Brandner

  We have a web application that delivers training to thousands of corporate students running on top of SQL Server 2005. Recently, we started seeing that a single specific query in the application went from 1 second to about 30 seconds in terms of execution time. The application started throwing timeouts in that area. Our first thought was that we may have incorrect indexes, so we reviewed the tables and indexes. However, similar queries elsewhere in the application also run quickly. Reviewing the indexes showed us that they were configured as expected. We were able to narrow it down to a single query, not a stored procedure. Running this query in SQL Studio also runs quickly. We tried running the application in a different server environment. So a different web server with the same query, parameters and database. The query still ran slow. The query is a fairly large one related to determining a student's current list of training. It includes joins and left joins on a dozen tables and subqueries. A few of the tables are fairly large (hundreds of thousands of rows) and some of the other tables are small lookup tables. The query uses a grouping clause and a few where conditions. A few of the tables are quite active and the contents change often but the volume of added rows doesn't seem extreme. These symptoms led us to consider the execution plan. First off, as soon as we reset the execution plan cache with the SQL command 'DBCC FREEPROCCACHE', the problem went away. Unfortunately, the problem started to reoccur within a few days. The problem has continued to plague us for awhile now. It's usually the same query, but we did appear to see the problem occur in another single query recently. It happens enough to be a nuisance. We're having a heck of a time trying to fix it since we can't reproduce it in any other environment other than production. I have downloaded the High Availability guide from Red Gate and I read up more on execution plans. I hope to run the profiler on the live server, but I'm a bit concerned about impact. I would like to ask - what is the best way to figure out what is triggering this problem? Has anyone else seen this same issue?

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• Python Terminated Thread Cannot Restart

  - by Mel Kaye

  Hello, I have a thread that gets executed when some action occurs. Given the logic of the program, the thread cannot possibly be started while another instance of it is still running. Yet when I call it a second time, I get a "RuntimeError: thread already started" error. I added a check to see if it is actually alive using the Thread.is_alive() function, and it is actually dead. What am I doing wrong? I can provide more details as are needed.

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• How to programaticly access min and Max values defined in a core-data model designed with XCode ?

  - by Xav

  I was expecting to find that in the NSAttributeDescription class, but only the default value is there. Behind the scene I tought a validationPredicate was created but trying to reach it using NSDictionary* dico= [[myManagedObject entity] propertiesByName]; NSAttributeDescription* attributeDescription=[dico objectForKey:attributeKey]; for (NSString* string in [attributeDescription validationWarnings]) just get me nowhere, no validationWarnings, no validationPredicates... any thoughts on this ? Edit1: It seems that getting the entity straight from the managedObject doesn't give you the full picture. Getting the Entity from the NSManagedObjectModel permits to reach the validationWarnings & validationPredicates...

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• Interface issue

  - by peter

  i added a property 'WrmVersion' in interface IResourcePolicy but i am not getting those thing in the implementation side means here it should come in the List view data. means SubItems.Add(((IResourcePolicy)Data).WrmVersion is not getting This is the interface public interface IResourcePolicy { DataVersion WrmVersion { get; set; } bool ResourcePolicyEnabled { get; set; } } i am implementing it in public new IResourcePolicy Data { get { return (IResourcePolicy)base.Data; } } protected override void OnUpdate() { if(Data != null) { Text = base.Data.Name; if(SubItems.Count == 1) { SubItems.Add(((IResourcePolicy)Data).ResourcePolicyEnabled.ToString()); }

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