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I have an array which gets filled with different error messages as my script runs.

I need a way to check if it is empty of not at the end of the script and take a specific action if it is.

I have already tried treating it like a normal VAR and using -z to check it, but that does not seem to work. Is there a way to check if an array is empty or not in Bash?

Thanks

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closed as off topic by mdpc, EEAA, Ward, Khaled, dunxd Feb 11 '13 at 10:26

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1 Answer

Supposing your array is $errors, just check to see if the count of elements is zero.

if [ ${#errors[@]} -eq 0 ]; then
    echo "No errors, hooray"
else
    echo "Oops, something went wrong..."
fi
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Perfect, thank you Michael. –  Marcos Sander Feb 11 '13 at 4:19
    
Please note that = is a string operator. It happens to work fine in this case, but I'd use the proper arithmetic operator -eq instead (just in case I'd want to switch to -ge or -lt, etc.). –  musiphil Nov 8 '13 at 19:27
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