mirror of
https://github.com/actions/setup-python.git
synced 2024-11-13 19:09:22 -05:00
149 lines
No EOL
4.4 KiB
Markdown
149 lines
No EOL
4.4 KiB
Markdown
# has-value [](https://www.npmjs.com/package/has-value) [](https://npmjs.org/package/has-value) [](https://npmjs.org/package/has-value) [](https://travis-ci.org/jonschlinkert/has-value)
|
|
|
|
> Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
|
|
|
|
## Install
|
|
|
|
Install with [npm](https://www.npmjs.com/):
|
|
|
|
```sh
|
|
$ npm install --save has-value
|
|
```
|
|
|
|
**Works for:**
|
|
|
|
* booleans
|
|
* functions
|
|
* numbers
|
|
* strings
|
|
* nulls
|
|
* object
|
|
* arrays
|
|
|
|
## Usage
|
|
|
|
Works with property values (supports object-path notation, like `foo.bar`) or a single value:
|
|
|
|
```js
|
|
var hasValue = require('has-value');
|
|
|
|
hasValue('foo');
|
|
hasValue({foo: 'bar'}, 'foo');
|
|
hasValue({a: {b: {c: 'foo'}}}, 'a.b.c');
|
|
//=> true
|
|
|
|
hasValue('');
|
|
hasValue({foo: ''}, 'foo');
|
|
//=> false
|
|
|
|
hasValue(0);
|
|
hasValue(1);
|
|
hasValue({foo: 0}, 'foo');
|
|
hasValue({foo: 1}, 'foo');
|
|
hasValue({foo: null}, 'foo');
|
|
hasValue({foo: {bar: 'a'}}}, 'foo');
|
|
hasValue({foo: {bar: 'a'}}}, 'foo.bar');
|
|
//=> true
|
|
|
|
hasValue({foo: {}}}, 'foo');
|
|
hasValue({foo: {bar: {}}}}, 'foo.bar');
|
|
hasValue({foo: undefined}, 'foo');
|
|
//=> false
|
|
|
|
hasValue([]);
|
|
hasValue([[]]);
|
|
hasValue([[], []]);
|
|
hasValue([undefined]);
|
|
hasValue({foo: []}, 'foo');
|
|
//=> false
|
|
|
|
hasValue([0]);
|
|
hasValue([null]);
|
|
hasValue(['foo']);
|
|
hasValue({foo: ['a']}, 'foo');
|
|
//=> true
|
|
|
|
hasValue(function() {})
|
|
hasValue(function(foo) {})
|
|
hasValue({foo: function(foo) {}}, 'foo');
|
|
hasValue({foo: function() {}}, 'foo');
|
|
//=> true
|
|
|
|
hasValue(true);
|
|
hasValue(false);
|
|
hasValue({foo: true}, 'foo');
|
|
hasValue({foo: false}, 'foo');
|
|
//=> true
|
|
```
|
|
|
|
## isEmpty
|
|
|
|
To do the opposite and test for empty values, do:
|
|
|
|
```js
|
|
function isEmpty(o) {
|
|
return !hasValue.apply(hasValue, arguments);
|
|
}
|
|
```
|
|
|
|
## 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
|
|
|
|
* [define-property](https://www.npmjs.com/package/define-property): Define a non-enumerable property on an object. | [homepage](https://github.com/jonschlinkert/define-property "Define a non-enumerable property on an object.")
|
|
* [get-value](https://www.npmjs.com/package/get-value): Use property paths (`a.b.c`) to get a nested value from an object. | [homepage](https://github.com/jonschlinkert/get-value "Use property paths (`a.b.c`) to get a nested value from an object.")
|
|
* [set-value](https://www.npmjs.com/package/set-value): Create nested values and any intermediaries using dot notation (`'a.b.c'`) paths. | [homepage](https://github.com/jonschlinkert/set-value "Create nested values and any intermediaries using dot notation (`'a.b.c'`) paths.")
|
|
* [unset-value](https://www.npmjs.com/package/unset-value): Delete nested properties from an object using dot notation. | [homepage](https://github.com/jonschlinkert/unset-value "Delete nested properties from an object using dot notation.")
|
|
|
|
### Contributing
|
|
|
|
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
|
|
|
|
### Contributors
|
|
|
|
| **Commits** | **Contributor** |
|
|
| --- | --- |
|
|
| 17 | [jonschlinkert](https://github.com/jonschlinkert) |
|
|
| 2 | [rmharrison](https://github.com/rmharrison) |
|
|
|
|
### 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._ |