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How to check if a file is empty in Bash?
I have a file called diff.txt. Want to check if it is empty. Did something like this but couldn't get it working.
10 Answe...
How do I save and restore multiple variables in python?
I need to save about a dozen objects to a file and then restore them later.
I've tried to use a for loop with pickle and shelve but it didn't work right.
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php is null or empty?
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What you're looking for is:
if($variable === NULL) {...}
Note the ===.
When use ==, as you did, PHP treats NULL, false, 0, the empty string, and empty arrays as equal.
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How to delete multiple files at once in Bash on Linux?
I have this list of files on a Linux server:
7 Answers
7
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How to find the most recent file in a directory using .NET, and without looping?
I need to find the most recently modified file in a directory.
11 Answers
11
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ls command: how can I get a recursive full-path listing, one line per file?
How can I get ls to spit out a flat list of recursive one-per-line paths?
24 Answers
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How do I clone a subdirectory only of a Git repository?
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EDIT: As of Git 2.19, this is finally possible, as can be seen in this answer.
Consider upvoting that answer.
Note: in Git 2.19, only client-side support is implemented, server-side support is still missing, so it only works when clo...
How do you specify a byte literal in Java?
If I have a method
6 Answers
6
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Is a GUID unique 100% of the time?
Is a GUID unique 100% of the time?
22 Answers
22
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Why are side-effects modeled as monads in Haskell?
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Suppose a function has side effects. If we take all the effects it produces as the input and output parameters, then the function is pure to the outside world.
So, for an impure function
f' :: Int -> Int
we add the RealWorld to the...