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PHP Regex to check date is in YYYY-MM-DD format

I'm trying to check that dates entered by end users are in the YYYY-MM-DD. Regex has never been my strong point, I keep getting a false return value for the preg_match() I have setup. ...
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Mercurial: Can I rename a branch?

We now have a "stiging" branch, where "staging" seems to be a far better semantic fit. What's a good strategy for handling this? ...
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Using Git with an existing Xcode project

I am trying to figure out how to use git in my project workflow, and I have an existing Xcode project that I want to put into the repository. I think I have the repository set up correctly under organizer, but the Source Control menu is grayed out. Apparently, it's easy to do if you start a new pr...
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Android studio using > 100% CPU at all times - no background processes appear to be running

... noticed Android Studio (when running) uses greater than 100% CPU at all times, even when it appears there are no background processes that the IDE is running (indexing, etc). I might suspect this were something specific to my box, but some fellow developers are encountering this as well. ...
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How to make the tab character 4 spaces instead of 8 spaces in nano?

When I press TAB in nano editor, the cursor will jump with 8 spaces like this: 6 Answers ...
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log4j: Log output of a specific class to a specific appender

... An example: log4j.rootLogger=ERROR, logfile log4j.appender.logfile=org.apache.log4j.DailyRollingFileAppender log4j.appender.logfile.datePattern='-'dd'.log' log4j.appender.logfile.File=log/radius-prod.log log4j.appender.logfile.la...
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How do you list the active minor modes in emacs?

How do you list the active minor modes in emacs? 5 Answers 5 ...
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How to create an infinite loop in Windows batch file?

...sing good(?) old goto? :loop echo Ooops goto loop See also this for a more useful example. share | improve this answer | follow | ...
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Naming convention - underscore in C++ and C# variables

It's common to see a _var variable name in a class field. What does the underscore mean? Is there a reference for all these special naming conventions? ...
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Stashing only staged changes in git - is it possible?

Is there a way I can stash just my staged changes? The scenario I'm having issues with is when I've worked on several bugs at a given time, and have several unstaged changes. I'd like to be able to stage these files individually, create my .patch files, and stash them away until the code is approved...