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What does the leading semicolon in JavaScript libraries do?

... It allows you to safely concatenate several JavaScript files into one, to serve it quicker as one HTTP request. share | improv...
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C# vs C - Big performance difference

... Since you never use 'root', the compiler may have been removing the call to optimize your method. You could try to accumulate the square root values into an accumulator, print it out at the end of the method, and see what's going on. Edit : see Jalf's answer below ...
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Shell - How to find directory of some command?

...d that this was just an alias defined on my .bashrc located on my ~home. Really thank you. – Gabriel L. Oliveira May 20 '10 at 13:36 1 ...
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Change multiple files

...ot even just a builtin. For sed -i 's/old/new' *, the expansion of * must ALL be passed as an arglist to sed, and I'm fairly sure this has to happen before the sed process can even be started. Using the for loop, the full arglist (the expansion of *) never gets passed as a command, only stored in ...
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Getting a timestamp for today at midnight?

... I actually need to get start of today and midnight of today. How can I find start of today I mean for 00:00:00 – Happy Coder Nov 22 '13 at 9:23 ...
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Is it correct to use DIV inside FORM?

... It is totally fine . The form will submit only its input type controls ( *also Textarea , Select , etc...). You have nothing to worry about a div within a form. ...
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Round double in two decimal places in C#?

... This is actually what should be used. Most operations in banks etc are done using this method (MidpointRounding.AwayFromZero). – MadBoy Mar 1 '10 at 18:40 ...
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Subtract days from a date in JavaScript

...t saving time is only 23 hours long, and the last is 25 hours long. it usually doesn't matter, but it's something to consider. – Kip Aug 18 '09 at 20:55 12 ...
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How to install multiple python packages at once using pip

... it neither here nor on google. So i was curious if there is a way to install multiple packages using pip. Something like: ...
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Finding the direction of scrolling in a UIScrollView?

I have a UIScrollView with only horizontal scrolling allowed, and I would like to know which direction (left, right) the user scrolls. What I did was to subclass the UIScrollView and override the touchesMoved method: ...