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• What do you wish you could've learned sooner?

  - by Industrial

  What things, methods, workflows, etc. can you not live without today and wish you had learned of a long time ago? For example, learning some basic Ubuntu and using my debugger properly in the IDE have made a huge difference to me and are together probably the two things that I most wish I had done a long time ago. Using a debugger just seems like common sense now to many of us, but to those that are in a early stage of their career it might not. (I'm a good example of that.)

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• ValidateRect vs BeginPaint

  - by Armentage

  From the MSDN documentation: The BeginPaint function validates the entire client area. The ValidateRect function should not be called if a portion of the update region must be validated before the next WM_PAINT message is generated.1 I've been programming with Win32 API for years, and I've never thought to call the ValidateRect function. A co-worker of mine today pointed that we were missing a call to ValidateRect, which fixed a bug we were having doing some high-speed animation using GDI (I know, an oxymoron) Can someone tell me whether or not a call to ValidateRect is neccessary after a BeginPaint/EndPaint pair? I have seen no documentation at MSDN that sheds light on this, and what documentation and examples I do see that you do not need to.

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• is NATURAL JOIN any better than SELECT FROM WHERE in terms of performance ?

  - by ashy_32bit

  Today I got into a debate with my project manager about Cartesian products. He says a 'natural join' is somehow much better than using 'select from where' because the later cause the db engine to internally perform a Cartesian product but the former uses another approach that prevents this. As far as I know, the natural join syntax is not any different in anyway than 'select from where' in terms of performance or meaning, I mean you can use either based on your taste. SELECT * FROM table1,table2 WHERE table1.id=table2.id SELECT * FROM table1 NATURAL JOIN table2 please elaborate about the first query causing a Cartesian product but the second one being somehow more smart

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• Is PThread a good choice for multi-platorm C/C++ multi-threading program?

  - by RogerV

  Been doing mostly Java and smattering of .NET for last five years and haven't written any significant C or C++ during that time. So have been away from that scene for a while. If I want to write a C or C++ program today that does some multi-threading and is source code portable across Windows, Mac OS X, and Linux/Unix - is PThread a good choice? The C or C++ code won't be doing any GUI, so won't need to worry with any of that. For the Windows platform, I don't want to bring a lot of Unix baggage, though, in terms of unix emulation runtime libraries. Would prefer a PThread API for Windows that is a thin-as-possible wrapper over existing Windows threading APIs. ADDENDUM EDIT: Am leaning toward going with boost:thread - I also want to be able to use C++ try/catch exception handling too. And even though my program will be rather minimal and not particularly OOPish, I like to encapsulate using class and namespace - as opposed to C disembodied functions.

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• only return random number when it is unique

  - by phil

  My brain is melting today and i cannot think how to do this simple bit of code. numberList is a string of numbers seperated by commas like '2, 34, 10' etc.. when i request a random number i need to check if the string has the number, if it does i want to keep requesting a random number until the random number is definitely not in the string. i cant think what kind of loop i would do to get this to work: Random r = new Random(); public int RandomPos(int max) { int i; do { i = r.Next(max) + 1; } while (!numberList.Contains(i.ToString())); return i; }

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• JAVA Menu Dimension

  - by ikurtz

  greetings. im am trying to learn JAVA/Swing, today is my first day. i have been able to set up a menu n my test application. but the item occupy very little space ie they are narrow. how do i go about extendng the amount of space it uses? screenshot can be view at the following URL: http://www.freeimagehosting.net/image.php?087aa4c9dc.jpg i am studying Teach Yourself Java 6 in 21 Days 5th Ed, Java Swing, 2nd Edition, 2002 and Teach Yourself Programming With Java In 24 Hours, 4th Edition (2005) bu none of them shed any light on this issue. thank you for your time.

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• Get websites title and description, save to utf8 table, php/mysql

  - by Geteburg

  Hi guys, I've been trying today all day to figure this out and I have no idea. What I want: Get the title and meta description of any kind of website. Save this info to utf table in mysql. What the problem is? Different sites have different charsets which results in that some have chinese, some contain umlauts (german), then we have russian and so on.. I've tried preg_match which works for some while not for others, i've tried DOMdocument which is the same as preg_match. Is there any class available that will do this? Hope someone can help, thanks.

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• Change Wallpaper in windows mobile

  - by niks86

  Hello Friends, Hey im devloping application in that i want to set images as the wallpaper for that i written below code.when i used remote registry in registry value get updated but the wallpaper of the windows mobile does not changed.Can u plz tel me what i need to do. Here is my code. [DllImport("coredll.dll")] private static extern int SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam); public const int HWND_BROADCAST = 0xffff; public const int WM_WININICHANGE = 0x001A; File.Copy(@"\My Documents\My Pictures\Album Sample_05.jpg", @"\My Documents\My Pictures\Album Sample_09.jpg", true); Registry.SetValue(@"HKEY_CURRENT_USER\Software\Microsoft\Today", "Wall", @"\My Documents\My Pictures\Album Sample_05.jpg"); SendMessage((IntPtr)HWND_BROADCAST, WM_WININICHANGE, 0xF2, 0); plz help me. Thanks.

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• Rails 2.3.5: How to handle this type of validation

  - by randombits

  The use case is simple. I allow users to enter in an expiration field which needs to be between 1 and 15 into a form. The model takes that number and converts it into a datetime (such as adding 15 days from today) and stores it in the database. What's the correct way to actually validate that though? Do I validate against the datetime format that gets persisted in the database or the select box (1..15) that the user gets to pick through the form? I want to be able to validate that the user is putting in 1..15.. How is this done with ActiveRecord validation in Rails 2.3.5?

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• how to use OR in jquery

  - by user1493339

  1st i would like to thanks all who view this and special thanks for those who answer this. today, i tested this out but it not working, so just want to know how should this code. multiple "OR" in one line $("input[name='ABC']or[name='DEF']or[name='GHI']or[name='JKL']").click(function (){ //do something }); or even put else for it like... $("input[name='ABC'][name='DEF'][name='GHI'][name='JKL']").click(function (){ //do something }else{ //do something else }); i know both code is invalid, so is that possible to code in that way? so far i code it all one by one, so my coding is very long.

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• Creating methods with infinite overloads ? (.NET)

  - by MarceloRamires

  In C# you can do this: foo = string.Format("{0} {1} {2} {3} ...", "aa", "bb", "cc" ...); This method Format() accepts infinite parameters, being the first one how the string should be formatted and the rest are values to be put in the string. Today I've come to a situation where I had to get a set of strings and test them, then I remembered this language functionality, but I had no clue. After a few unsuccessful web searches, I've realised it would be more prudent to just get an array, which didn't make me quite satisfied. Q: How do I make a function that accepts infinite parameters? And how do I use it ?

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• How can i access my custom webpart in sharepoint foundation 2010?

  - by oklahoma_overlord

  Hi, So i just started trying to develop a simple webpart today for a sharepoint foundation i put on a virtual machine. I have no previous experience with sharepoint whatsoever. As i cant run a sharepoint 2010 on my local machine for dev purposes i followed advices in this thread http://social.technet.microsoft.com/Forums/en/sharepoint2010programming/thread/cda807f6-4edf-4efc-8e9b-4d446356c8ae to able to actually develop something (just the registry bit). I created the simple test web part (writes out "hi"), uploaded it to virtual machine, added it with add-spsolution and install-spsolution in powershell with success. When i do get-solution through powershell on my webpart it says deployed = true. What am i missing from here to get it to actually show up somewhere in the web interface so i can add it to a page? Cheers

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• @Path and regular expression (Jersey/REST)

  - by Castanho

  Hi there! I'm using Jersey in a REST project and I'm needing to use regular expression. Digging about it is simple like: @Path("/resources) public class MyResource { @GET @Path("{subResources:.*}/bar") public String get() {...} } But, I'm only capable of using regex if in my @Path contains a variable or text value, example: @Path("{SubResource1}/{subResources:.*}/bar") Or @Path("hardCodeString/{subResources:.*}/bar") Today I could run with this solution of a variable, but is not oK for my perspective. Question Does anyone have worked with something related? I'm doing something wrong? I think that this could be a bug, when working with more then one @Path, one in the Class and other in the Method. Any tips is appreciated! Regards

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• Queues And Wait Handles in C#

  - by Michael Covelli

  I've had the following code in my application for some years and have never seen an issue from it. while ((PendingOrders.Count > 0) || (WaitHandle.WaitAny(CommandEventArr) != 1)) { lock (PendingOrders) { if (PendingOrders.Count > 0) { fbo = PendingOrders.Dequeue(); } else { fbo = null; } } // Do Some Work if fbo is != null } Where CommandEventArr is made up of the NewOrderEvent (an auto reset event) and the ExitEvent (a manual reset event). But I just realized today that its not thread safe at all. If this thread gets interrupted right after the first (PendingOrder.Count 0) check has returned false. And then the other thread both enqueues an order and sets the NewOrderEvent before I get a chance to wait on it, the body of the while loop will never run. What's the usual pattern used with a Queue and an AutoResetEvent to fix this and do what I'm trying to do with the code above?

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• Why is Harvest being purchased at all?

  - by Mike Caron

  Does your work environment use Harvest SCM? I've used this now at two different locations and find it appalling. In one situation I wrote a conversion script so I could use CVS locally and then daily import changes to the Harvest system while I was sleeping. The corp was fanatic about using Harvest, despite 80% of the programmers crying for something different. It was needlessly complicated, slow and heavy. It is now a job requirement for me that Harvest is not in use where I work. Has anyone else used Harvest before? What's your experience? As bad as mine? Did you employ other, different workarounds? Why is this product still purchased today?

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• How do you use the C language to produce a ruby gem?

  - by DJTripleThreat

  I would like to see some source code or maybe a link to some that gives at least a stub for writing ruby gems in the C languages (C++?? is that possible too?) Also, some of you may know that Facebook compiles some of their code natively as php extensions for better performance. Is anyone doing this in Rails? If so, what has been your experience with it? Have you found it to be useful? Thanks. Edit: I guess I'll answer my own question with some stuff I learned today but I'm going to leave the question open for another answer because I'd like to see what others have to say on this topic

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• Any reason NOT to slap the 'synchronized' keyword everywhere?

  - by unknown

  In my java project, almost every non-static method I've written is synchronized. I've decided to fix up some code today, by removing most of the synchronized keywords. Right there I created several threading issues that took quite a while to fix, with no increase in performance. In the end I reverted everything. I don't see anyone else writing code with "synchronized" everywhere. So is there any reason I shouldn't have "synchronized" everywhere? What if I don't care too much about performance (ie. the method isn't called more than once every few seconds)?

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• Threads in JAVA

  - by theband

  I was today asked in an interview over the Thread concepts in JAVA? The Questions were... What is a thread? Why do we go for threading? A real time example over the threads. Can we create threads in Spring framework service class. Can flex call a thread? I did not answer any questions apart from definition of Thread, that too i just learnt from internet. Can anyone explain me clearly over this.

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• 1030 Got error 28 from storage engine

  - by ScoRpion...

  I am working on a project where i need to create a database with 300 tables for each user who wants to see the demo application. it was working fine but today when i was testing with a new user to see a demo it showed me this error message 1030 Got error 28 from storage engine After spending some time googling i found it is an error that is related to space of database or temporary files. I tried to fix it but i failed. now i am not even able to start mysql. How can i fix this and i would also like to increase the size to maximum so that i won't face the same issue again and again.

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• JSON + PHP + JQuery + Autocomplete problem...

  - by RohanCS

  Hi Everyone, Only started today but I'm having massive problems trying to understand JSON/AJAX etc, I've gotten my code this far but am stumped on how to return the data being pulled by the AJAX request to the jQuery Auto complete function. var autocomplete = new function (){ this.init = function() { $('#insurance_destination').autocomplete({source: lookup}); } function lookup(){ $.ajax({ url: "scripts/php/autocomplete.php", data: {query:this.term}, dataType: "json", cache : false, success: function(data) { for(key in data){ return { label: key, value: data[key][0] } } } }); } } And example of the JSON string being returned by a PHP script {"Uganda":["UGA","UK4","Worldwide excluding USA, Canada and the Carribbean"]}

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• Language Prejudices

  - by paranoid_pedlar

  I've been researching programming languages, in hopes of learning to program. Since I've heard a lot of good things about Ruby, I went ahead and purchased The Pragmatic guide to Ruby. I understand that there is a lot of hype about Ruby on Rails. Because ruby lets you program scripts, applications, and internet helped me to decide on learning Ruby vs other languages. Today I watched a talk about google go, and it's really caught my attention. Coincidently I stumbled on a talk about jruby. I've been under the impression that java applications are bloated an slow. However the speaker made a point of what is wrong with Ruby, and how Jruby diagnosed Ruby's shortcomings. All that said. I would like to hear peoples opinions on Jruby vs Ruby, and if Ruby is working on fixing these "short comings". Also, how do you, the programming community feel about "go" and if I'm making a mistake learning Ruby instead of go, or Jruby. Appreciate your advice and opinions Thanks,

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• How can I identify an argument as a year in Perl?

  - by dexter

  I have created a file argument.pl which takes several arguments first of which should be in form of a year For example: 2010 23 type. Here 2010 is a year my code does something like: use strict; use warning use Date::Calc qw(:all); my ($startyear, $startmonth, $startday) = Today(); my $weekofyear = (Week_of_Year ($startyear,$startmonth,$startday))[0]; my $Year = $startyear; ... ... if ($ARGV[0]) { $Year = $ARGV[0]; } Here this code fills $Year with "current year" if $ARGV[0] is null or doesn't exist. now here instead of if ($ARGV[0]) Is it possible to check that the value in $ARGV[0] is a valid year (like 2010, 1976,1999 etc.)?

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• WordPress 2.9.2 htaccess curruption issue strikes again (in Patched site)

  - by Scott B

  The htaccess file below crashed the site with an internal server error (500). This site has the misc.php patch that's discussed here: Wordpress Bug #11903 Apparently something else is at play here or the patch is not fully addressing the issue. 3 sites went down yesterday. 2 today (so far). All sites have the patch file that's referenced in the bug track link above. AuthName mysite.net AuthUserFile /home/mysite/public_html/_vti_pvt/service.pwd AuthGroupFile /home/mysite/public_html/_vti_pvt/service.grp Options All -Indexes # BEGIN WordPress # BEGIN WordPress root <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress root dule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress root

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• How can I remove Ruby, Rails & mysql to start the installation process again?

  - by ben

  I've been trying to get setup with Ruby on Rails today, but I think I've followed some bad instructions along the way, and nothing seems to work. I've now borrowed the book "Agile Web Development with Rails, Third Edition" from a friend, and want to follow the setup instructions in that. Firstly, do I need to remove what I've setup previously? If yes, how do I do it? I can't seem to find instructions anywhere. I'm running OSX 10.6.1, so I know that it came with some stuff already setup, but I've been installing customized stuff over the top which I think I'll have to remove. Thanks for reading!

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• web application-file upload

  - by Dhanraj

  Hi, I am developing an web application. I am using file upload control to browse files. i have xls file in C:\Mailid.xls path. When i use FileUpload1.PostedFile.FileName command i was get the full path(C:\Mailid.xls). Today I installed IE 8 After the installation I unable to get the full path of the file what could be the problem Event I uninstalled IE 8. Currently I am using IE 7. how can i get the fullpath(C:\Mailid.xls) in my project. Regards Dhanraj.S

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