File: array-to-string

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bash 5.1-2%2Bdeb11u1
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#! /bin/bash

# Format: array_to_string vname_of_array vname_of_string separator
array_to_string()
{
	(( ($# < 2) || ($# > 3) )) && {
		 "$FUNCNAME: usage: $FUNCNAME arrayname stringname [separator]"
		return 2
	}

	local array=$1 string=$2
	((3==$#)) && [[ $3 = ? ]] && local IFS="${3}${IFS}"
	eval $string="\"\${$array[*]}\""
	return 0
}