Extend (prototype) the Array object with new features - currently only intersect...
require('extend-array');
var testArray1 = ['testVal1', 'testVal2', 'testVal3', 'testVal4', 'testVal5'];
var testArray2 = ['valTest1', 'valTest2', 'testVal5', 'valTest3', 'valTest4'];
var res = testArray1.intersect(testArray2);
console.log(res);
[ 'testVal5' ]
As soon as the module has shown it's worth and stability on a live system, it will be marked as version >= 1.0.0.
Until then: Feel free to play around with it, learn from it.
npm install extend-array