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Check if a string matches a regex in Bash script

One of the arguments that my script receives is a date in the following format: yyyymmdd . 5 Answers ...
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PHP Function Comments

Just a quick question: I've seen that some PHP functions are commented at the top, using a format that is unknown to me: 4 ...
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How do I get user IP address in django?

How do I get user's IP in django? 11 Answers 11 ...
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Why in Java 8 split sometimes removes empty strings at start of result array?

Before Java 8 when we split on empty string like 3 Answers 3 ...
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What exactly does an #if 0 … #endif block do?

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How can I negate the return-value of a process?

I'm looking for a simple, but cross-platform negate -process that negates the value a process returns. It should map 0 to some value != 0 and any value != 0 to 0, i.e. the following command should return "yes, nonexistingpath doesn't exist": ...
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How to change UIPickerView height

Is it possible to change the height of UIPickerView? Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked in Interface Builder. ...
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Stream.Seek(0, SeekOrigin.Begin) or Position = 0

When you need to reset a stream to beginning (e.g. MemoryStream ) is it best practice to use 2 Answers ...
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Converting file size in bytes to human-readable string

I'm using this function to convert a file size in bytes to a human-readable file size: 19 Answers ...
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Most efficient way to make the first character of a String lower case?

What is the most efficient way to make the first character of a String lower case? 11 Answers ...