Comparing two Arrays and generating a new Array.?????????

Hi guys

can some one solve this problem. plz...

Say i have two arrays, one is String Array and other is selectedLayers array with same source names(a,b,c) selected in after effects.

Now i want to generate new Array using String in mySelectedComps[].source.name.

For example

var callName=["a","b"];

var mySelectedComps=app.project.activeItems.selectedLayers; //(eg.i have selected a,b,c comps in afx)

var newArray=[];

if(callName[]==mySelectedComps[].source.name){

newArray.push();

}

how to interate both arrays at same time or how to Compare an element in an Array1 with all elements in  Array2 until it returns true/false.and then go to next element in Array1. ??