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• Clear a file without changing its timestamp

  - by Alex Farber

  Is it possible to clear a file preserving its timestamp, using standard Linux commands? For example: echo "" file-name converts the text file to empty, this is OK for me. But I need to keep the timestamp unchanged.

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• Real World Examples of read-write in concurrent software

  - by Richard Fabian

  I'm looking for real world examples of needing read and write access to the same value in concurrent systems. In my opinion, many semaphores or locks are present because there's no known alternative (to the implementer,) but do you know of any patterns where mutexes seem to be a requirement? In a way I'm asking for candidates for the standard set of HARD problems for concurrent software in the real world.

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• Swing: easiest way to align width of [dynamic][static][dynamic] components?

  - by java.is.for.desktop

  What is the easiest way in standard Java Swing to align three components in such a way that: the dynamic widths of Component1 and Component3 are adjusted to be equal, while Component2 (which is in between) has constant width? Imagine we have some resizable JPanel (such as inside a JFrame). Small width should look like this: [----------------whole JPanel----------------] [--Component1--] [Component2] [--Component3--] Big width should look like this: [------------------------whole JPanel------------------------] [------Component1------] [Component2] [------Component3------] Note: I just "trialed-and-errored" with GroupLayout for too long.

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• Multi selection on System.Windows.Forms.DataGrid (CF)

  - by Vaccano

  Is there a way to do multi-selction on with the standard datagrid? (I am using the compact framework.)

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• Java API Method Run Times

  - by Mike

  Is there a good resource to get run times for standard API functions? It's somewhat confusing when trying to optimize your program. I know Java isn't made to be particularly speedy but I can't seem to find much info on this at all. Example Problem: If I am looking for a certain token in a file is it faster to scan each line using string.contains(...) or to bring in say 100 or so lines putting them to a local string them performing contains on that chunk.

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• Child segmentation fault when doing SOAP request in php 5.1.6

  - by user350691

  I get a "[notice] child pid 26701 exit signal Segmentation fault (11)" in apache log when I try to do a simple soap request using standard php soap library. I'm running php 5.1.6 on Centos 5.4

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• Creating a Custom Ubuntu Daemon

  - by Chris S

  What's the "correct" way to create a custom daemon in Ubuntu, that will start at boot time and be controllable by Ubuntu's standard daemon start/stop commands? Can I just copy and paste one of the scripts in /etc/init.d or do I need to "register" the daemon somewhere else?

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• Remember Chromeless Windows?

  - by AGoodDisplayName

  We used to be able to use javascript in IE to produce a chromeless window...no buttons, scrollbars or even the standard edges of the browser window. My question: Is there any way to accomplish this type of window look from the web with today's browsers?

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• Setting the map as hybrid has no effect?

  - by TheLearner

  Does anyone know why setting the map as hybrid has no effect. Setting it as standard and satellite works fine though? [mapView setMapType: MKMapTypeHybrid];

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• Are PHP5 objects passed by reference?

  - by morpheous

  I cant seem to get any consistent info on this. Different sources appear to say different things and trhe venerable php.net iteslf (appears) not to explicitly state this - although I must admit, I only had a quick look. In cases where I am passing around 'heavy' objects, I need to pass by reference, but I dont want to keep typing: function foo(TypeName& $obj) if I can get away with simply, function foo(TypeName $obj) So what does the standard say?

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• Book with C programs that have real programming examples.

  - by Siamore

  This is my first question on Stack Overflow, I would like to know about any c programming books that have real programs to introduce real problems as opposed to standard books with examples aimed to teach the language it should be sort of like a challenge with solutions so that concepts like recursion can be used i know that i should find solutions to existing problems to learn the language but this is my first attempt and i find it hard to understand some simple problems so i was hoping for a book with solutions.

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• Will RIA Services SL Client Library and Tooling work agains ADO.NET Data Service / OData ?

  - by Rob

  At MIX it was announced that WCF RIA Services supports OData Endpoint on the server now. But is there a good way to use a real OData Server in the WCF RIA Services Tooling as an endpoint or is that just an option for the team to say that are supporting the standard, too?

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• Can someone explain what does <? super T> mean and when should it be used and how this construction

  - by Roman

  I'm using generics rather long time but I've never used construction like List<? super T>. What does it mean? How to use it? How does it look after erasure? I also wonder: is it something standard in generic programming (template programming?) or it's just a java 'invention'? Does c#, for example, allow similar constructions?

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• How can I fix a locale warning from perl?

  - by xain

  When I run perl, I get the warning: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). Any ideas on how to fix it?

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• WPF TextBox - don't hide the selection

  - by Justin R

  WPF's TextBox (System.Windows.Controls.TextBox) appears to highlight selected text only when it has the focus. I need to make a TextBox continue to show the selection when focus is lost. In a standard Win32 EDIT control I could achieve this with ES_NOHIDESEL. How can I get the equivalent in WPF?

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• How to get Color object in java from css-style string which describes color?

  - by Roman

  For example, I have strings #0f0, #00FF00, green and in all cases I want to transform them to Color.GREEN. Are there any standard ways or maybe some libraries have necessary functionality?

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• Detecting if two png images are different

  - by Benjol

  (Context: running autohotkey scripts to try and automate some tests. The plan is to take screenshots and then compare them to 'standard' screenshots to detect if output has changed). Is there a 'clever' way to check if two png images are different? By clever I mean other than comparing them byte by byte? (after having compared their size, obviously)

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• Rails - how to serialize a tree not in a form

  - by tiny_clanger

  I started with the standard scriptaculous drag and drop tree, and that all works fine. Then started implementing this: http://www.artweb-design.de/2008/5/30/scriptaculous-sortabletree which gives a good drag and drop tree Where I am stuck is how to get serialize the tree (unordered list)? It's not in a form, and I can't find a way to serialize it to move onto setting up the AJAX update.

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• How to create a unique web page address in ASP.NET

  - by Jim

  Is there a standard way to create unique web page address in ASP.NET? I'm sending surveys to customers and will be including a link to the web page. For example: http://www.mysurveypages.foo/survey/UniqueID I would then customize the survey based on who I sent it to. I know it can be done by passing in a unique parameter to a page but I curious about doing it this way.

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• Default value of function parameter

  - by httpinterpret

  1. int Add (int a, int b = 3); int Add (int a, int b) { } 2. int Add (int a, int b); int Add (int a, int b = 3) { } Both work,which is the standard way and why?

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• File count in a directory using C++

  - by harik

  How do I get the total number of files in a directory by using C++ standard library? Any help is appreciated.

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• What instance type should I choose?

  - by cute

  To run video chat service? High-Memory or High-CPU? And, guess Standard isn't suitable?

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• Implement "tail -f" in C++

  - by Hamming

  Hi! I want to create a small code in C++ with the same functionality as "tail-f": watch for new lines in a text file and show them in the standard output. The idea is to have a thread that monitors the file Is there an easy way to do it without opening and closing the file each time?

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• Painless way to trim leading/trailing whitespace in C?

  - by coledot

  Is there a clean, preferably standard method of trimming leading and trailing whitespace from a string in C? I'd roll my own, but I would think this is a common problem with an equally common solution.

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• Virtualmin domain name registration php

  - by David Maitland

  in a PHP web page i need to run this following command to create a new domain: virtualmin create-domain --domain DOMAIN --pass PASS --plan 'Standard Package' --limits-from-plan --features-from-plan This is usually executed in a shell but i don't know how to do it from a web page and also i need to take the domain string and pass string from a web form. Can anyone help with the PHP code as my skills are basic and i have already tried a few things that just don't work. Thanks.

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