Sort array according to array

sort-based-on-array.js

// It is expected that `order` and `items` have the same length 
// and that all key values in items exist in order
// Order according to 
var order = [ 'charlie', 'delta', 'quebec', 'foxtrott' ];

// Needs re-ordering
var items = [ 
    { key: 'charlie' },
    { key: 'delta' },
    { key: 'foxtrott' }, // not in order
    { key: 'quebec'} 
];

function itemFilter(item) {
    return item.key;
}

function sortArrayByArray(items, order, itemFilter) {
  var sorted = [];
  items.forEach(function (item) {
    var pos = order.indexOf(itemFilter ? itemFilter(item) : item);
    if (pos > -1) {
      sorted[pos] = item;
    }
  });
  return sorted;
}

console.log(sortArrayByArray(items, order, itemFilter)); 
// expect: [{ key: 'charlie' }, { key: 'delta' }, { key: 'quebec'}, { key: 'foxtrott' }]