Check if array is empty in Bash

Marcos Sander asked:

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?


My 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"
    echo "Oops, something went wrong..."

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