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

Using Lodash's map function, this returns the original array a, multiplied by the constant 5:

_.map( a, function multiply(x){ return x*5; } );