Easiest way to check for an index or a key in an array?

Question

Using:

set -o nounset

1. Having an indexed array like:

   myArray=( "red" "black" "blue" )
            
   
   
           

Answer 1

This is the easiest way I found for scripts.

is the string you want to find, ASSOC_ARRAY the name of the variable holding your associative array.

Dependign on what you want to achieve:

key exists:

if grep -qe "" <(echo "${!ASSOC_ARRAY[@]}"); then echo key is present; fi

key exists not:

if ! grep -qe "" <(echo "${!ASSOC_ARRAY[@]}"); then echo key not present; fi

value exists:

if grep -qe "" <(echo "${ASSOC_ARRAY[@]}"); then echo value is present; fi

value exists not:

if ! grep -qe "" <(echo "${ASSOC_ARRAY[@]}"); then echo value not present; fi