Fill an array with another array, repeating when necessary.

fillArray.js

// Init a source array contains numbers 0-35
var source = Array.apply(null, {length: 36}).map(Number.call, Number);

// Init the result array as undefined using the arguments pseudo array.
var result = Array.apply(null, {length: 100});

// The magic
result = result.map(function(val, index) {
  return source[index % source.length];
});

console.log(result.toString());