aboutsummaryrefslogtreecommitdiff
path: root/node_modules/fbjs/lib/compactArray.js.flow
blob: 5b8ccbecb72d246fae35dc8757788eca3dbdb9df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
/**
 * Copyright 2015-present Facebook. All Rights Reserved.
 *
 * @providesModule compactArray
 * @typechecks
 * @flow
 */

'use strict';

/**
 * Returns a new Array containing all the element of the source array except
 * `null` and `undefined` ones. This brings the benefit of strong typing over
 * `Array.prototype.filter`.
 */

function compactArray<T>(array: Array<T | null | void>): Array<T> {
  var result = [];
  for (var i = 0; i < array.length; ++i) {
    var elem = array[i];
    if (elem != null) {
      result.push(elem);
    }
  }
  return result;
}

module.exports = compactArray;