How can I get the number of differences between two types of array without casting

Question

I have two types of arrays with the same length:

array1: [2,1,2,3,1]
array2: ["2","2","2","2","1"]

I want to compare them and get the number of differences without casting. For example, for the arrays above, I'm expecting to get the output: 2

Answer 1

This function return the number of elements that different between arrays.

  function compareArrays(x,y){
       var diff = 0;
       x.forEach((elem,index)=>{
             if(y[index]!=elem){
                 diff++;
             }
      });
      return diff;
   }

I use == in y[index]==elem thus 1=='1' is true.