@ardatan/relay-compiler/lib/util/partitionArray.js

A compiler tool for building GraphQL-driven applications.

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 * @format
 */
// flowlint ambiguous-object-type:error
'use strict';
/**
 * Partitions an array given a predicate. All elements satisfying the predicate
 * are part of the first returned array, and all elements that don't are in the
 * second.
 */

function partitionArray(array, predicate) {
  var first = [];
  var second = [];

  for (var i = 0; i < array.length; i++) {
    var item = array[i];

    if (predicate(item)) {
      first.push(item);
    } else {
      second.push(item);
    }
  }

  return [first, second];
}

module.exports = partitionArray;