+#!/usr/bin/env bash
+
+yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
+die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
+try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+checkIsInArray() {
+ # Desc: Checks if input arg is element in array
+ # Usage: checkIsInArray arg1 arg2
+ # Version: 0.0.1
+ # Input: arg1: test string
+ # arg2: array
+ # Output: exit code 0 if test string is in array; 1 otherwise
+ # Example: checkIsInArray "foo" "${myArray[@]}"
+ # Ref/Attrib: [1] How do I check if variable is an array? https://stackoverflow.com/a/27254437
+ # [2] How to pass an array as function argument? https://askubuntu.com/a/674347
+ local return_state input arg1 arg2 string_test
+ local -a array_test
+ input=("$@") # See [2]
+ arg1="${input[0]}";
+ arg2=("${input[@]:1}");
+ #yell "DEBUG:input:${input[@]}";
+ #yell "DEBUG:arg1:${arg1[@]}";
+ #yell "DEBUG:arg2:${arg2[@]}";
+
+ string_test="$arg1";
+ array_test=("${arg2[@]}");
+
+ #yell "DEBUG:string_test:$string_test";
+ #yell "DEBUG:$(declare -p array_test)";
+ for element in "${array_test[@]}"; do
+ #yell "DEBUG:element:$element";
+ if [[ "$element" =~ ^"$string_test" ]]; then
+ return_state="true";
+ continue;
+ fi;
+ done;
+
+ # Report exit code
+ if [[ $return_state == "true" ]]; then
+ return 0;
+ else
+ return 1;
+ fi;
+} # Check if string is element in array
+
+# Sample test code
+my_array=("jan" "feb" "mar" "apr");
+yell "Array contains:${my_array[@]}";
+test_string="feb";
+yell "Checking to see if $test_string is in array...";
+if checkIsInArray "$test_string" "${my_array[@]}"; then
+ yell "\"$test_string\" is in array";
+else
+ yell "\"$test_string\" is not in array";
+fi;
+yell ""; # debug
+
+sleep 1;
+
+my_array=("jan" "feb" "mar" "apr");
+yell "Array contains:${my_array[@]}";
+test_string="oct";
+yell "Checking to see if $test_string is in array...";
+if checkIsInArray "$test_string" "${my_array[@]}"; then
+ yell "\"$test_string\" is in array";
+else
+ yell "\"$test_string\" is not in array";
+fi;
+yell ""; # debug
+
+sleep 1;
+
+my_array=("jan" "feb" "mar" "apr");
+yell "Array contains:${my_array[@]}";
+test_string="feb mar";
+yell "Checking to see if $test_string is in array...";
+if checkIsInArray "$test_string" "${my_array[@]}"; then
+ yell "\"$test_string\" is in array";
+else
+ yell "\"$test_string\" is not in array";
+fi;
+yell ""; # debug