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Format date and time in a Windows batch script

In a Windows (Windows XP) batch script I need to format the current date and time for later use in files names, etc. 33 An...
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Merge Images Side by Side(Horizontally)

I have five images of sizes: 600x30, 600x30, 600x30, 600x30, 810x30. Their names are: 0.png, 1.png, 2.png, 3.png, 4.png, respectively. ...
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Rails detect if request was AJAX

In my action I wish to only respond with processing if it was called from an AJAX request. How do I check? 5 Answers ...
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How do you read CSS rule values with JavaScript?

I would like to return a string with all of the contents of a CSS rule, like the format you'd see in an inline style. I'd like to be able to do this without knowing what is contained in a particular rule, so I can't just pull them out by style name (like .style.width etc.) ...
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Set operations (union, intersection) on Swift array?

Are there any standard library calls I can use to either perform set operations on two arrays, or implement such logic myself (ideally as functionally and also efficiently as possible)? ...
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Checking if a string can be converted to float in Python

I've got some Python code that runs through a list of strings and converts them to integers or floating point numbers if possible. Doing this for integers is pretty easy ...
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C# Double - ToString() formatting with two decimal places but no rounding

How do I format a Double to a String in C# so as to have only two decimal places? 15 Answers ...
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Redirect STDERR / STDOUT of a process AFTER it's been started, using command line?

In the shell you can do redirection, > < , etc., but how about AFTER a program is started? 8 Answers ...
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Maintaining the final state at end of a CSS3 animation

I'm running an animation on some elements that are set to opacity: 0; in the CSS. The animation class is applied onClick, and, using keyframes, it changes the opacity from 0 to 1 (among other things). ...
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How do I close an open port from the terminal on the Mac?

I opened port #5955 from a java class to comunicate from a client. How do i close this port after I am done? and also which command can show me if port open or closed? ...