bc: exit if out arr given for arrFilter is non-empty

Author: robstoll

src/utility/array-utils.sh

@@ -99,6 +99,8 @@ function arrFilter() {
 	local -r predicate=$3
 	shift 3 || traceAndDie "could not shift by 3"
 
+	exitIfArgIsNotArray arrFilter_arrIn 1
+	exitIfArgIsNotArrayOrIsNonEmpty arrFilter_arrOut 2
 	exitIfArgIsNotFunction "$predicate" 3
 
 	local -ri arrFilter_arrInLength="${#arrFilter_arrIn[@]}"
@@ -130,6 +132,8 @@ function arrTakeEveryX() {
 	local -ri offset=$4
 	shift 4 || traceAndDie "could not shift by 4"
 
+	# arrFilter will check that arrFilterMod_arrIn and arrFilterMod_arrOut are arrays and out non empty
+
   # shellcheck disable=SC2317   # is passed by name to arrFilter
 	function arrFilterMod_fn() {
 		local -r index=$2
@@ -148,6 +152,7 @@ function arrStringEntryMaxLength() {
 	fi
 	local -rn arrStringEntryMaxLength_arr=$1
 	shift 1 || traceAndDie "could not shift by 1"
+	exitIfArgIsNotArray arrStringEntryMaxLength
 
 	local -i i maxLength=0 arrLength="${#arrStringEntryMaxLength_arr[@]}"
 	for ((i = 0; i < arrLength; ++i)); do