How do I multiply each member of an array by a scalar in javascript?

Question

For example, how do I achieve the following without iterating over the array?

var a = [1, 2, 3] * 5;  // a should equal [5, 10, 15]

Answer 1

You can try this:

function scalarMultiply(arr, multiplier) {
   for (var i = 0; i < arr.length; i++)
   {
      arr[i] *= multiplier;
   }
   return arr;
}

USAGE

var a = scalarMultiply([1, 2, 3], 5);