islistinlist function for coldfusion 11 - coldfusion

Question

I have this function and running flawless on coldfusion 2016 and lucee but wen i run in cf11, it fails.
i am trying to understand how can i make it work with cf11
private any function isListInList(list1, list2, returnBoolean = true){
var rv = false;
var matches = [];
listToArray(list1).each(
function(element) {
if(listToArray(list2).containsNoCase(element)){
rv = true;
arrayAppend(matches, element);
}
}
);
return arguments.returnBoolean ? rv : matches;
}

Answer 1

This version of your function will compile and run on CF11
private any function isListInList(list1, list2, returnBoolean = true){
var rv = false;
var matches = [];
var arr1 = listToArray(list1);
var arr2 = listToArray(list2);
arr1.each(
function(element) {
if(arr2.findNoCase(element)){
rv = true;
arrayAppend(matches, element);
}
}
);
return arguments.returnBoolean ? rv : matches;
}
This version that uses a for() loop will be optimized for large arrays since it will short circuit the loop when it finds a match and you just want the boolean back.
private any function isListInList(list1, list2, returnBoolean = true){
var arr1 = listToArray(list1);
var arr2 = listToArray(list2);
var rv = false;
var matches = [];
for( var element in arr1 ) {
if(arr2.findNoCase(element)){
if( returnBoolean ) {
return true;
} else {
arrayAppend(matches, element);
}
}
}
return arguments.returnBoolean ? false : matches;
}