Joshua Alvarado 8ee9002c76 Add flow strict typing to isEmpty
Summary: Add flow strict typing to the isEmpty lib

Reviewed By: wcheng86

Differential Revision: D9200520

fbshipit-source-id: ac5717216199166e7485abcdfcba03ab2bbe90d2
2018-08-09 10:47:58 -07:00

30 lines
531 B
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow strict
* @format
*/
'use strict';
/**
* Mimics empty from PHP.
*/
function isEmpty(obj: mixed): boolean {
if (Array.isArray(obj)) {
return obj.length === 0;
} else if (typeof obj === 'object') {
for (const i in obj) {
return false;
}
return true;
} else {
return !obj;
}
}
module.exports = isEmpty;