How to check whether multiple values exist within an Javascript array

Question

So, I\'m using Jquery and have two arrays both with multiple values and I want to check whether all the values in the first array exist in the second.

Answer 1

Try this.

var arr1 = [34, 78, 89];
var arr2 = [78, 67, 34, 99, 56, 89];

var containsVal = true;
$.each(arr1, function(i, val){
   if(!$.inArray(val, arr2) != -1){
       retVal = false;
       return false;
   }
});

if(containsVal){
    //arr2 contains all the values from arr1 
}