You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
129 lines
3.9 KiB
Markdown
129 lines
3.9 KiB
Markdown
12 months ago
|
# has-values [](https://www.npmjs.com/package/has-values) [](https://npmjs.org/package/has-values) [](https://npmjs.org/package/has-values) [](https://travis-ci.org/jonschlinkert/has-values)
|
||
|
|
|
||
|
|
> Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
Install with [npm](https://www.npmjs.com/):
|
||
|
|
|
||
|
|
```sh
|
||
|
|
$ npm install --save has-values
|
||
|
|
```
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
```js
|
||
|
|
var hasValue = require('has-values');
|
||
|
|
|
||
|
|
hasValue('a');
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue('');
|
||
|
|
//=> false
|
||
|
|
|
||
|
|
hasValue(1);
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue(0);
|
||
|
|
//=> false
|
||
|
|
|
||
|
|
hasValue({a: 'a'}});
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue({});
|
||
|
|
hasValue({foo: undefined});
|
||
|
|
//=> false
|
||
|
|
|
||
|
|
hasValue({foo: null});
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue(['a']);
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue([]);
|
||
|
|
hasValue([[], []]);
|
||
|
|
hasValue([[[]]]);
|
||
|
|
//=> false
|
||
|
|
|
||
|
|
hasValue(['foo']);
|
||
|
|
hasValue([0]);
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue(function(foo) {});
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue(function() {});
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue(true);
|
||
|
|
//=> true
|
||
|
|
|
||
|
|
hasValue(false);
|
||
|
|
//=> true
|
||
|
|
```
|
||
|
|
|
||
|
|
## isEmpty
|
||
|
|
|
||
|
|
To test for empty values, do:
|
||
|
|
|
||
|
|
```js
|
||
|
|
function isEmpty(o, isZero) {
|
||
|
|
return !hasValue(o, isZero);
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
## Release history
|
||
|
|
|
||
|
|
### v1.0.0
|
||
|
|
|
||
|
|
* `zero` always returns true
|
||
|
|
* `array` now recurses, so that an array of empty arrays will return `false`
|
||
|
|
* `null` now returns true
|
||
|
|
|
||
|
|
## About
|
||
|
|
|
||
|
|
### Related projects
|
||
|
|
|
||
|
|
* [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.")
|
||
|
|
* [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.")
|
||
|
|
* [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.")
|
||
|
|
* [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.")
|
||
|
|
* [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.")
|
||
|
|
|
||
|
|
### Contributing
|
||
|
|
|
||
|
|
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
|
||
|
|
|
||
|
|
### Building docs
|
||
|
|
|
||
|
|
_(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.)_
|
||
|
|
|
||
|
|
To generate the readme, run the following command:
|
||
|
|
|
||
|
|
```sh
|
||
|
|
$ npm install -g verbose/verb#dev verb-generate-readme && verb
|
||
|
|
```
|
||
|
|
|
||
|
|
### Running tests
|
||
|
|
|
||
|
|
Running 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:
|
||
|
|
|
||
|
|
```sh
|
||
|
|
$ npm install && npm test
|
||
|
|
```
|
||
|
|
|
||
|
|
### Author
|
||
|
|
|
||
|
|
**Jon Schlinkert**
|
||
|
|
|
||
|
|
* [github/jonschlinkert](https://github.com/jonschlinkert)
|
||
|
|
* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
|
||
|
|
|
||
|
|
### License
|
||
|
|
|
||
|
|
Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
|
||
|
|
Released under the [MIT License](LICENSE).
|
||
|
|
|
||
|
|
***
|
||
|
|
|
||
|
|
_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on May 19, 2017._
|