How to subtract one array from another, element-wise, in javascript

Question

If i have an array A = [1, 4, 3, 2] and B = [0, 2, 1, 2] I want to return a new array (A - B) with values [1, 2, 2, 0]. What is the most e

Answer 1

For Simple and efficient ever.

Check here : JsPref - For Vs Map Vs forEach

var a = [1, 4, 3, 2],
  b = [0, 2, 1, 2],
  x = [];

for(var i = 0;i<=b.length-1;i++)
  x.push(a[i] - b[i]);
  
console.log(x);