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  • wpf how to get all TextBoxes in wpf application

    - by GC87
    Hi, I'm trying to learn how to do proper wpf application and now I have a big trouble. I know how I would do this if I had to do it with Windows Forms, but I don't know how to modify it to fit with wpf. Would someone know the answer? Here is my code for Windows Forms Form_loaded event: foreach (Control ctrl in this.Controls) { if (ctrl is TextBox) { ctrl.Text = ""; } }

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  • Sysadmin 101: How can I figure out why my server crashes and monitor performance?

    - by bflora
    I have a Drupal-powered site that seems to have neverending performance problems. It was butt-slow about 5 months ago. I brought in some guys who installed nginx for anonymous visitors, ajaxified a few queries so they wouldn't fire during page load, and helped me find a few bottlenecks in the code. For about a month, the site was significantly faster, though not "fast" by any stretch of the word. Meanwhile, I'm now shelling out $400/month to Slicehost to host a site that gets less than 5,000/uniques a day. Yes, you read that right. Go Drupal. Recently the site started crashing again and is slow again. I can't afford to hire people to come in, study my code from top to bottom, and make changes that may or may not help anymore. And I can't afford to throw more hardware at the problem. So I need to figure out what the problem is myself. Questions: When apache crashes, is it possible to find out what caused it to crash? There has to be a way, right? If so, how can I do this? Is there software I can use that will tell me which process caused my server to die? (e.g. "Apache crashed because someone visited page X." or "Apache crashed because you were importing too many RSS items from feed X.") There's got to be a way to learn this, right? What's a good, noob-friendly way to monitor my current apache performance? My developer friends tell me to "just use Top, dude," but Top shows me a bunch of numbers without any context. I have no clue what qualifies as a bad number or a good number in Top, or which processes are relevant and which aren't. Are there any noob-friendly server monitoring tools out there? Ideally, I could have a page that would give me a color-coded indicator about how apache is performing and then show me a list of processes or pages that are sucking right now. This way, I could know when performance is bad and then what's causing it to be so bad. Why does PHP memory matter? My apparently has a 30MB memory foot print. Will it run faster if I bring that number down? Thanks for any advice. I spent a year or so trying to boost my advertising income so I could hire a contractor to solve my performance woes. I didn't want to have to learn all this sysadmin voodoo. I'm now resigned to the fact that might not have a choice.

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  • Erlang programming exercises

    - by valya
    I'm learning Erlang. I've moved from Haskell so I don't want to and have to learn functional programming. But Erlang is quite specific because of the microprocesses. So, can you give me some examples which will be simple to test and measure and use all the power of Erlang?

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  • Resources for learning Monads, Functors, Monoids, Arrows etc

    - by Dony Borris
    Can you people please suggest some good books / weblinks from where I can get to learn about above mentioned concepts? (Please note that I am a Java programmer and have NO prior experience with functional programming. I have been studying Scala since last one month and would appreciate the resources that try to teach the above mentioned concepts with Scala. (or even Java, if posible))

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  • .Net Obfuscation

    - by Behrooz
    hi. as many of you know there is no copyright in some countries. I support copyrights myself, but in Iran: Windows Server 2008 =1$ king 2008 = 14$ MS SQL Server 2008 =50 Cents ... how can i prevent my code being Decompiled before 30 Seconds(I have lot's of videos witch Learn how to decompile in 30 Seconds). what is best obfuscator program(.Net) money can buy? does it have any Automated Anti obfuscation program?

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  • What is a good programming language for beginners? [closed]

    - by user122401
    Possible Duplicates: Best ways to teach a beginner to program? What is the easiest language to start with? What is a good programming language for beginners? I am 15 and had learned C++ before never got into it though? But is this like learning a new language? like having to do it over and over and every day having new stuff to learn ?

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  • why to use code generators

    - by Night Walker
    Hi all I have encountered this topic lately and couldn't understand why they are needed ... Can you explain me why i should use them in my projects and how they can ease my life . Examples will be great, and where from i can learn this topic little more . Thanks.

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  • how to implement video and audio merger program ?

    - by egebilmuh
    Hi guys I want to make a program which takes video and audio and merges them. Video Type or audio type is not important for me. I just want to make so- called program. How can i make this ? does any library exist for this ? (I know there are many program about this topic but i want to learn how to implement such a program.) Help me please about this topic.

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  • Where to go after PHP?

    - by sub
    I'm starting to get sick of PHP and search for a web-development language with future. What to learn next? Can I rely on the availability of Ruby (on Rails) on my client's hosters? Could Django be a better choice?

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  • Trying to manually recreate a simple generate/scaffolding script

    - by montooner
    I'm trying to understand Rails from the ground up. I want to learn how to manually create basic show-all/show-single/CRUD functionality in the framework. I currently am working on the display-all functionality, but am stopped by an error when I try to request all items in the Products db Here are the steps I've taken so far: script/generate controller Products script/generate model Products rake db:migrate modified products_controller.rb to add: def index() { @products = Product.all} (error: uninitialized constant ProductsController::Product) ideally, dump all orders in the view What's the fix?

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  • ANN for decompiler?

    - by Rhythmic Algorithm
    Has there ever been any attempts at utilizing artificial neural networks in decompilation? It would be nice if it was possible to provide the trimmed semantics of source along with the code in to a neural network so it could learn the connection between the two. I assume this would likely lose it's effectiveness when there is optimizations and maybe work better for high level languages too but I'm interested in hearing any attempts anyone has had at this.

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  • Recommended OpenGL / GLUT Reference

    - by TJB
    What OpenGL / GLUT reference is the best around? Ideally I'm looking for something with C++ sample code to help me learn OpenGL as well as details about the APIs similar to what MSDN provides for .net programming. If there isn't a one stop shop, then please list the set of references I should use and what the strengths of each one is. Thanx!

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  • mean image filter

    - by turmoil
    Starting to learn image filtering and stumped on a question found on website: Applying a 3×3 mean filter twice does not produce quite the same result as applying a 5×5 mean filter once. However, a 5×5 convolution kernel can be constructed which is equivalent. What does this kernel look like? Would appreciate help so that I can understand the subject better. Thanks.

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  • Error in django url.py??

    - by qulzam
    I am new in django. I try to practice and run the wiki application (i found tutorial at Learn django), In url.py file i write the following urls... urlpatterns = patterns('', (r'^wikicamp/(?p[^/]+)/edit/$','wikiapp.wiki.views.edit_page'), (r'^wikicamp/(?p[^/]+)/save/$','wikiapp.wiki.views.save_page'), (r'^wikicamp/(?p[^/]+)/$','wikiapp.wiki.views.view_page'), ) But there is errror which i cant understand. sre_Constants.error:Unexpected end of pattern. (r'^wikicamp/(?p[^/]+)/$','wikiapp.wiki.views.view_page'),

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  • Why are Python exceptions named "Error"?

    - by Elena
    Why are Python exceptions named "Error" (e.g. ZeroDivisionError, NameError, TypeError etc) and not "Exception" (e.g. ZeroDivisionException, NameException, TypeException etc). I come from a Java background and started to learn Python recently, as such this is confusing because in java there is a distinction between error and exception. Is there a difference in Python also or not? Can someone explain or point me to some documentation explaining it? Thank you!

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  • How does the setup bootstrapper detect if prerequisites are installed?

    - by Marek
    Trying to solve this problem. I would like to learn how the bootstrapper detects if prerequisites (specifically .NET 3.5) are installed. According to this reference, a way to detect if .NET is installed is to check the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5 Using process monitor, I have inspected registry queries done by the bootstrapper (setup.exe) and it did not show any access to this registry key. Does anybody know how the bootstrapper determines whether the prerequisites are installed on the target system?

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