javascript find common values in two arrays code example
Example 1: find unique values between multiple array
var array3 = array1.filter(function(obj) { return array2.indexOf(obj) == -1; });
Example 2: javascript get intersection of two arrays
function getArraysIntersection(a1,a2){
return a1.filter(function(n) { return a2.indexOf(n) !== -1;});
}
var colors1 = ["red","blue","green"];
var colors2 = ["red","yellow","blue"];
var intersectingColors=getArraysIntersection(colors1, colors2); //["red", "blue"]