source: trip-planner-front/node_modules/has-values/README.md@ eed0bf8

Last change on this file since eed0bf8 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 3.9 KB
Line 
1# has-values [![NPM version](https://img.shields.io/npm/v/has-values.svg?style=flat)](https://www.npmjs.com/package/has-values) [![NPM monthly downloads](https://img.shields.io/npm/dm/has-values.svg?style=flat)](https://npmjs.org/package/has-values) [![NPM total downloads](https://img.shields.io/npm/dt/has-values.svg?style=flat)](https://npmjs.org/package/has-values) [![Linux Build Status](https://img.shields.io/travis/jonschlinkert/has-values.svg?style=flat&label=Travis)](https://travis-ci.org/jonschlinkert/has-values)
2
3> Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.
4
5## Install
6
7Install with [npm](https://www.npmjs.com/):
8
9```sh
10$ npm install --save has-values
11```
12
13## Usage
14
15```js
16var hasValue = require('has-values');
17
18hasValue('a');
19//=> true
20
21hasValue('');
22//=> false
23
24hasValue(1);
25//=> true
26
27hasValue(0);
28//=> false
29
30hasValue({a: 'a'}});
31//=> true
32
33hasValue({});
34hasValue({foo: undefined});
35//=> false
36
37hasValue({foo: null});
38//=> true
39
40hasValue(['a']);
41//=> true
42
43hasValue([]);
44hasValue([[], []]);
45hasValue([[[]]]);
46//=> false
47
48hasValue(['foo']);
49hasValue([0]);
50//=> true
51
52hasValue(function(foo) {});
53//=> true
54
55hasValue(function() {});
56//=> true
57
58hasValue(true);
59//=> true
60
61hasValue(false);
62//=> true
63```
64
65## isEmpty
66
67To test for empty values, do:
68
69```js
70function isEmpty(o, isZero) {
71 return !hasValue(o, isZero);
72}
73```
74
75## Release history
76
77### v1.0.0
78
79* `zero` always returns true
80* `array` now recurses, so that an array of empty arrays will return `false`
81* `null` now returns true
82
83## About
84
85### Related projects
86
87* [has-value](https://www.npmjs.com/package/has-value): Returns true if a value exists, false if empty. Works with deeply nested values using… [more](https://github.com/jonschlinkert/has-value) | [homepage](https://github.com/jonschlinkert/has-value "Returns true if a value exists, false if empty. Works with deeply nested values using object paths.")
88* [is-number](https://www.npmjs.com/package/is-number): Returns true if the value is a number. comprehensive tests. | [homepage](https://github.com/jonschlinkert/is-number "Returns true if the value is a number. comprehensive tests.")
89* [is-plain-object](https://www.npmjs.com/package/is-plain-object): Returns true if an object was created by the `Object` constructor. | [homepage](https://github.com/jonschlinkert/is-plain-object "Returns true if an object was created by the `Object` constructor.")
90* [isobject](https://www.npmjs.com/package/isobject): Returns true if the value is an object and not an array or null. | [homepage](https://github.com/jonschlinkert/isobject "Returns true if the value is an object and not an array or null.")
91* [kind-of](https://www.npmjs.com/package/kind-of): Get the native type of a value. | [homepage](https://github.com/jonschlinkert/kind-of "Get the native type of a value.")
92
93### Contributing
94
95Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
96
97### Building docs
98
99_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_
100
101To generate the readme, run the following command:
102
103```sh
104$ npm install -g verbose/verb#dev verb-generate-readme && verb
105```
106
107### Running tests
108
109Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
110
111```sh
112$ npm install && npm test
113```
114
115### Author
116
117**Jon Schlinkert**
118
119* [github/jonschlinkert](https://github.com/jonschlinkert)
120* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
121
122### License
123
124Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
125Released under the [MIT License](LICENSE).
126
127***
128
129_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on May 19, 2017._
Note: See TracBrowser for help on using the repository browser.