update, text, response
This commit is contained in:
200
node_modules/is-number/README.md
generated
vendored
200
node_modules/is-number/README.md
generated
vendored
@@ -1,8 +1,6 @@
|
||||
# is-number [](https://www.npmjs.com/package/is-number) [](https://npmjs.org/package/is-number) [](https://npmjs.org/package/is-number) [](https://travis-ci.org/jonschlinkert/is-number)
|
||||
# is-number [](https://www.npmjs.com/package/is-number) [](https://npmjs.org/package/is-number) [](https://travis-ci.org/jonschlinkert/is-number)
|
||||
|
||||
> Returns true if the value is a finite number.
|
||||
|
||||
Please consider following this project's author, [Jon Schlinkert](https://github.com/jonschlinkert), and consider starring the project to show your :heart: and support.
|
||||
> Returns true if the value is a number. comprehensive tests.
|
||||
|
||||
## Install
|
||||
|
||||
@@ -12,176 +10,106 @@ Install with [npm](https://www.npmjs.com/):
|
||||
$ npm install --save is-number
|
||||
```
|
||||
|
||||
## Why is this needed?
|
||||
|
||||
In JavaScript, it's not always as straightforward as it should be to reliably check if a value is a number. It's common for devs to use `+`, `-`, or `Number()` to cast a string value to a number (for example, when values are returned from user input, regex matches, parsers, etc). But there are many non-intuitive edge cases that yield unexpected results:
|
||||
|
||||
```js
|
||||
console.log(+[]); //=> 0
|
||||
console.log(+''); //=> 0
|
||||
console.log(+' '); //=> 0
|
||||
console.log(typeof NaN); //=> 'number'
|
||||
```
|
||||
|
||||
This library offers a performant way to smooth out edge cases like these.
|
||||
|
||||
## Usage
|
||||
|
||||
```js
|
||||
const isNumber = require('is-number');
|
||||
```
|
||||
To understand some of the rationale behind the decisions made in this library (and to learn about some oddities of number evaluation in JavaScript), [see this gist](https://gist.github.com/jonschlinkert/e30c70c713da325d0e81).
|
||||
|
||||
See the [tests](./test.js) for more examples.
|
||||
```js
|
||||
var isNumber = require('is-number');
|
||||
```
|
||||
|
||||
### true
|
||||
|
||||
See the [tests](./test.js) for more examples.
|
||||
|
||||
```js
|
||||
isNumber(5e3); // true
|
||||
isNumber(0xff); // true
|
||||
isNumber(-1.1); // true
|
||||
isNumber(0); // true
|
||||
isNumber(1); // true
|
||||
isNumber(1.1); // true
|
||||
isNumber(10); // true
|
||||
isNumber(10.10); // true
|
||||
isNumber(100); // true
|
||||
isNumber('-1.1'); // true
|
||||
isNumber('0'); // true
|
||||
isNumber('012'); // true
|
||||
isNumber('0xff'); // true
|
||||
isNumber('1'); // true
|
||||
isNumber('1.1'); // true
|
||||
isNumber('10'); // true
|
||||
isNumber('10.10'); // true
|
||||
isNumber('100'); // true
|
||||
isNumber('5e3'); // true
|
||||
isNumber(parseInt('012')); // true
|
||||
isNumber(parseFloat('012')); // true
|
||||
isNumber(5e3) //=> 'true'
|
||||
isNumber(0xff) //=> 'true'
|
||||
isNumber(-1.1) //=> 'true'
|
||||
isNumber(0) //=> 'true'
|
||||
isNumber(1) //=> 'true'
|
||||
isNumber(1.1) //=> 'true'
|
||||
isNumber(10) //=> 'true'
|
||||
isNumber(10.10) //=> 'true'
|
||||
isNumber(100) //=> 'true'
|
||||
isNumber('-1.1') //=> 'true'
|
||||
isNumber('0') //=> 'true'
|
||||
isNumber('012') //=> 'true'
|
||||
isNumber('0xff') //=> 'true'
|
||||
isNumber('1') //=> 'true'
|
||||
isNumber('1.1') //=> 'true'
|
||||
isNumber('10') //=> 'true'
|
||||
isNumber('10.10') //=> 'true'
|
||||
isNumber('100') //=> 'true'
|
||||
isNumber('5e3') //=> 'true'
|
||||
isNumber(parseInt('012')) //=> 'true'
|
||||
isNumber(parseFloat('012')) //=> 'true'
|
||||
```
|
||||
|
||||
### False
|
||||
|
||||
Everything else is false, as you would expect:
|
||||
See the [tests](./test.js) for more examples.
|
||||
|
||||
```js
|
||||
isNumber(Infinity); // false
|
||||
isNumber(NaN); // false
|
||||
isNumber(null); // false
|
||||
isNumber(undefined); // false
|
||||
isNumber(''); // false
|
||||
isNumber(' '); // false
|
||||
isNumber('foo'); // false
|
||||
isNumber([1]); // false
|
||||
isNumber([]); // false
|
||||
isNumber(function () {}); // false
|
||||
isNumber({}); // false
|
||||
```
|
||||
|
||||
## Release history
|
||||
|
||||
### 7.0.0
|
||||
|
||||
* Refactor. Now uses `.isFinite` if it exists.
|
||||
* Performance is about the same as v6.0 when the value is a string or number. But it's now 3x-4x faster when the value is not a string or number.
|
||||
|
||||
### 6.0.0
|
||||
|
||||
* Optimizations, thanks to @benaadams.
|
||||
|
||||
### 5.0.0
|
||||
|
||||
**Breaking changes**
|
||||
|
||||
* removed support for `instanceof Number` and `instanceof String`
|
||||
|
||||
## Benchmarks
|
||||
|
||||
As with all benchmarks, take these with a grain of salt. See the [benchmarks](./benchmark/index.js) for more detail.
|
||||
|
||||
```
|
||||
# all
|
||||
v7.0 x 413,222 ops/sec ±2.02% (86 runs sampled)
|
||||
v6.0 x 111,061 ops/sec ±1.29% (85 runs sampled)
|
||||
parseFloat x 317,596 ops/sec ±1.36% (86 runs sampled)
|
||||
fastest is 'v7.0'
|
||||
|
||||
# string
|
||||
v7.0 x 3,054,496 ops/sec ±1.05% (89 runs sampled)
|
||||
v6.0 x 2,957,781 ops/sec ±0.98% (88 runs sampled)
|
||||
parseFloat x 3,071,060 ops/sec ±1.13% (88 runs sampled)
|
||||
fastest is 'parseFloat,v7.0'
|
||||
|
||||
# number
|
||||
v7.0 x 3,146,895 ops/sec ±0.89% (89 runs sampled)
|
||||
v6.0 x 3,214,038 ops/sec ±1.07% (89 runs sampled)
|
||||
parseFloat x 3,077,588 ops/sec ±1.07% (87 runs sampled)
|
||||
fastest is 'v6.0'
|
||||
isNumber('foo') //=> 'false'
|
||||
isNumber([1]) //=> 'false'
|
||||
isNumber([]) //=> 'false'
|
||||
isNumber(function () {}) //=> 'false'
|
||||
isNumber(Infinity) //=> 'false'
|
||||
isNumber(NaN) //=> 'false'
|
||||
isNumber(new Array('abc')) //=> 'false'
|
||||
isNumber(new Array(2)) //=> 'false'
|
||||
isNumber(new Buffer('abc')) //=> 'false'
|
||||
isNumber(null) //=> 'false'
|
||||
isNumber(undefined) //=> 'false'
|
||||
isNumber({abc: 'abc'}) //=> 'false'
|
||||
```
|
||||
|
||||
## About
|
||||
|
||||
<details>
|
||||
<summary><strong>Contributing</strong></summary>
|
||||
### Related projects
|
||||
|
||||
* [even](https://www.npmjs.com/package/even): Get the even numbered items from an array. | [homepage](https://github.com/jonschlinkert/even "Get the even numbered items from an array.")
|
||||
* [is-even](https://www.npmjs.com/package/is-even): Return true if the given number is even. | [homepage](https://github.com/jonschlinkert/is-even "Return true if the given number is even.")
|
||||
* [is-odd](https://www.npmjs.com/package/is-odd): Returns true if the given number is odd. | [homepage](https://github.com/jonschlinkert/is-odd "Returns true if the given number is odd.")
|
||||
* [is-primitive](https://www.npmjs.com/package/is-primitive): Returns `true` if the value is a primitive. | [homepage](https://github.com/jonschlinkert/is-primitive "Returns `true` if the value is a primitive. ")
|
||||
* [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.")
|
||||
* [odd](https://www.npmjs.com/package/odd): Get the odd numbered items from an array. | [homepage](https://github.com/jonschlinkert/odd "Get the odd numbered items from an array.")
|
||||
|
||||
### Contributing
|
||||
|
||||
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
|
||||
|
||||
</details>
|
||||
### Building docs
|
||||
|
||||
<details>
|
||||
<summary><strong>Running Tests</strong></summary>
|
||||
_(This document was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme) (a [verb](https://github.com/verbose/verb) generator), please don't edit the readme directly. Any changes to the readme must be made in [.verb.md](.verb.md).)_
|
||||
|
||||
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:
|
||||
To generate the readme and API documentation with [verb](https://github.com/verbose/verb):
|
||||
|
||||
```sh
|
||||
$ npm install && npm test
|
||||
$ npm install -g verb verb-generate-readme && verb
|
||||
```
|
||||
|
||||
</details>
|
||||
### Running tests
|
||||
|
||||
<details>
|
||||
<summary><strong>Building docs</strong></summary>
|
||||
|
||||
_(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:
|
||||
Install dev dependencies:
|
||||
|
||||
```sh
|
||||
$ npm install -g verbose/verb#dev verb-generate-readme && verb
|
||||
$ npm install -d && npm test
|
||||
```
|
||||
|
||||
</details>
|
||||
|
||||
### Related projects
|
||||
|
||||
You might also be interested in these projects:
|
||||
|
||||
* [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.")
|
||||
* [is-primitive](https://www.npmjs.com/package/is-primitive): Returns `true` if the value is a primitive. | [homepage](https://github.com/jonschlinkert/is-primitive "Returns `true` if the value is a primitive. ")
|
||||
* [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.")
|
||||
|
||||
### Contributors
|
||||
|
||||
| **Commits** | **Contributor** |
|
||||
| --- | --- |
|
||||
| 49 | [jonschlinkert](https://github.com/jonschlinkert) |
|
||||
| 5 | [charlike-old](https://github.com/charlike-old) |
|
||||
| 1 | [benaadams](https://github.com/benaadams) |
|
||||
| 1 | [realityking](https://github.com/realityking) |
|
||||
|
||||
### Author
|
||||
|
||||
**Jon Schlinkert**
|
||||
|
||||
* [LinkedIn Profile](https://linkedin.com/in/jonschlinkert)
|
||||
* [GitHub Profile](https://github.com/jonschlinkert)
|
||||
* [Twitter Profile](https://twitter.com/jonschlinkert)
|
||||
* [github/jonschlinkert](https://github.com/jonschlinkert)
|
||||
* [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
|
||||
|
||||
### License
|
||||
|
||||
Copyright © 2018, [Jon Schlinkert](https://github.com/jonschlinkert).
|
||||
Released under the [MIT License](LICENSE).
|
||||
Copyright © 2016, [Jon Schlinkert](https://github.com/jonschlinkert).
|
||||
Released under the [MIT license](https://github.com/jonschlinkert/is-number/blob/master/LICENSE).
|
||||
|
||||
***
|
||||
|
||||
_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on June 15, 2018._
|
||||
_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.1.30, on September 10, 2016._
|
||||
Reference in New Issue
Block a user