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app.filter('startsWithA', function () {
  // function to invoke by Angular each time
  // Angular passes in the `items` which is our Array
  return function (items) {
    // Create a new Array
    var filtered = [];
    // loop through existing Array
    for (var i = 0; i < items.length; i++) {
      var item = items[i];
      // check if the individual Array element begins with `a` or not
      if (/a/i.test(item.name.substring(0, 1))) {
        // push it into the Array if it does!
        filtered.push(item);
      }
    }
    // boom, return the Array after iteration's complete
    return filtered;
  };
});