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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
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$? is used to find the return value of the last executed command.
Try the following in the shell...
Can gcc output C code after preprocessing?
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edited Mar 27 '18 at 21:40
Gray
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Jeff
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answered Jul 5 '11 at 16:48
heymanheyman
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How does the keyword “use” work in PHP and can I import classes with it?
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zerkmszerkms
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How to fix HTTP 404 on Github Pages?
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edited Jan 11 at 12:41
answered Aug 27 '17 at 17:51
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Batch file to delete files older than N days
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edited Aug 1 '19 at 19:04
FZs
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Is it bad practice to have a constructor function return a Promise?
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4 Answers
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Continuously read from STDOUT of external process in Ruby
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174
I've had some success in solving this problem of mine. Here are the details, with some explanati...
How to determine whether an object has a given property in JavaScript
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edited Dec 3 '14 at 18:07
answered Dec 12 '09 at 21:45
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