ColdFusion Snippets

ArrayFilter.cfm

<cfscript>
	function ArrayFilter(required array arr, required filterFn) {
		var result = ArrayNew(1);
		for (var i = 1; i <= ArrayLen(arr); i++) {
			if (filterFn(arr[i])) {
				ArrayAppend(result, arr[i]);
			}
		}
		return result;
	}
</cfscript>

arrayify.cfm

<cffunction name="arrayify" access="private">
	<cfargument name="thing" type="any" required="true">
	<cfreturn (IsArray('thing')) ? thing : [thing]>
</cffunction>

<cfscript>
	function arrayify(required any thing) {
		return (IsArray('thing')) ? thing : [thing];
	}
</cfscript>

ArrayMap.cfm

<cfscript>
	function ArrayMap(required array arr, required mapFn) {
		var result = ArrayNew(1);
		for (var i = 1; i <= ArrayLen(arr); i++) {
			ArrayAppend(result, mapFn(arr[i]));
		}
		return result;
	}
</cfscript>

ArrayReduce.cfm

<cfscript>
	function ArrayReduce(required array arr, required reduceFn, any memo) {
		for (var i = 1; i <= ArrayLen(arr); i++) {
			memo = reduceFn(memo, arr[i]);
		}
		return memo;
	}
</cfscript>