<cfscript>
    arr = [1,2,3,4];
    struct = {"a":1,"b":2};

    /* FAILS WITH PARAMETER VALIDATION ERROR */
    //results = arr.map((a)=>a+1);
    //results = struct.map((a,b,c)=>a);
    //results = arr.filter((a)=>a==2);
    //results = struct.filter((a,b)=>b==2);


    results = arr.map((a)=>{return a+1});
    results = arr.filter((a)=>{return a==2});

    results = struct.map((a,b,c)=>{return a});
    results = struct.filter((a,b)=>{return b==2});

    // For some reason, reduce functions parse parameters correctly
    results = arr.reduce((a,b)=>a);
    results = struct.reduce((a,b,c)=>a);

    writeDump('worked!');


</cfscript>