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321 lines
7.6 KiB
Markdown
321 lines
7.6 KiB
Markdown
# split-string [](https://www.npmjs.com/package/split-string) [](https://npmjs.org/package/split-string) [](https://npmjs.org/package/split-string) [](https://travis-ci.org/jonschlinkert/split-string)
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> Split a string on a character except when the character is escaped.
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Please consider following this project's author, [Jon Schlinkert](https://github.com/jonschlinkert), and consider starring the project to show your :heart: and support.
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## Install
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Install with [npm](https://www.npmjs.com/):
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```sh
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$ npm install --save split-string
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```
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<!-- section: Why use this? -->
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<details>
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<summary><strong>Why use this?</strong></summary>
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<br>
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Although it's easy to split on a string:
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```js
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console.log('a.b.c'.split('.'));
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//=> ['a', 'b', 'c']
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```
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It's more challenging to split a string whilst respecting escaped or quoted characters.
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**Bad**
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```js
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console.log('a\\.b.c'.split('.'));
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//=> ['a\\', 'b', 'c']
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console.log('"a.b.c".d'.split('.'));
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//=> ['"a', 'b', 'c"', 'd']
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```
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**Good**
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```js
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var split = require('split-string');
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console.log(split('a\\.b.c'));
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//=> ['a.b', 'c']
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console.log(split('"a.b.c".d'));
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//=> ['a.b.c', 'd']
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```
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See the [options](#options) to learn how to choose the separator or retain quotes or escaping.
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<br>
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</details>
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## Usage
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```js
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var split = require('split-string');
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split('a.b.c');
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//=> ['a', 'b', 'c']
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// respects escaped characters
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split('a.b.c\\.d');
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//=> ['a', 'b', 'c.d']
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// respects double-quoted strings
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split('a."b.c.d".e');
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//=> ['a', 'b.c.d', 'e']
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```
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**Brackets**
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Also respects brackets [unless disabled](#optionsbrackets):
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```js
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split('a (b c d) e', ' ');
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//=> ['a', '(b c d)', 'e']
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```
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## Options
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### options.brackets
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**Type**: `object|boolean`
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**Default**: `undefined`
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**Description**
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If enabled, split-string will not split inside brackets. The following brackets types are supported when `options.brackets` is `true`,
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```js
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{
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'<': '>',
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'(': ')',
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'[': ']',
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'{': '}'
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}
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```
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Or, if object of brackets must be passed, each property on the object must be a bracket type, where the property key is the opening delimiter and property value is the closing delimiter.
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**Examples**
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```js
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// no bracket support by default
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split('a.{b.c}');
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//=> [ 'a', '{b', 'c}' ]
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// support all basic bracket types: "<>{}[]()"
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split('a.{b.c}', {brackets: true});
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//=> [ 'a', '{b.c}' ]
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// also supports nested brackets
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split('a.{b.{c.d}.e}.f', {brackets: true});
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//=> [ 'a', '{b.{c.d}.e}', 'f' ]
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// support only the specified brackets
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split('[a.b].(c.d)', {brackets: {'[': ']'}});
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//=> [ '[a.b]', '(c', 'd)' ]
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```
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### options.sep
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**Type**: `string`
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**Default**: `.`
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The separator/character to split on.
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**Example**
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```js
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split('a.b,c', {sep: ','});
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//=> ['a.b', 'c']
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// you can also pass the separator as string as the last argument
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split('a.b,c', ',');
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//=> ['a.b', 'c']
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```
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### options.keepEscaping
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**Type**: `boolean`
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**Default**: `undefined`
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Keep backslashes in the result.
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**Example**
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```js
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split('a.b\\.c');
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//=> ['a', 'b.c']
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split('a.b.\\c', {keepEscaping: true});
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//=> ['a', 'b\.c']
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```
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### options.keepQuotes
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**Type**: `boolean`
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**Default**: `undefined`
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Keep single- or double-quotes in the result.
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**Example**
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```js
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split('a."b.c.d".e');
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//=> ['a', 'b.c.d', 'e']
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split('a."b.c.d".e', {keepQuotes: true});
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//=> ['a', '"b.c.d"', 'e']
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split('a.\'b.c.d\'.e', {keepQuotes: true});
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//=> ['a', '\'b.c.d\'', 'e']
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```
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### options.keepDoubleQuotes
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**Type**: `boolean`
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**Default**: `undefined`
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Keep double-quotes in the result.
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**Example**
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```js
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split('a."b.c.d".e');
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//=> ['a', 'b.c.d', 'e']
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split('a."b.c.d".e', {keepDoubleQuotes: true});
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//=> ['a', '"b.c.d"', 'e']
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```
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### options.keepSingleQuotes
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**Type**: `boolean`
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**Default**: `undefined`
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Keep single-quotes in the result.
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**Example**
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```js
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split('a.\'b.c.d\'.e');
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//=> ['a', 'b.c.d', 'e']
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split('a.\'b.c.d\'.e', {keepSingleQuotes: true});
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//=> ['a', '\'b.c.d\'', 'e']
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```
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## Customizer
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**Type**: `function`
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**Default**: `undefined`
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Pass a function as the last argument to customize how tokens are added to the array.
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**Example**
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```js
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var arr = split('a.b', function(tok) {
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if (tok.arr[tok.arr.length - 1] === 'a') {
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tok.split = false;
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}
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});
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console.log(arr);
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//=> ['a.b']
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```
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**Properties**
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The `tok` object has the following properties:
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* `tok.val` (string) The current value about to be pushed onto the result array
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* `tok.idx` (number) the current index in the string
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* `tok.str` (string) the entire string
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* `tok.arr` (array) the result array
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## Release history
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### v3.0.0 - 2017-06-17
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**Added**
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* adds support for brackets
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## About
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<details>
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<summary><strong>Contributing</strong></summary>
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Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
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</details>
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<details>
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<summary><strong>Running Tests</strong></summary>
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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:
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```sh
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$ npm install && npm test
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```
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</details>
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<details>
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<summary><strong>Building docs</strong></summary>
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_(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.)_
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To generate the readme, run the following command:
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```sh
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$ npm install -g verbose/verb#dev verb-generate-readme && verb
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```
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</details>
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### Related projects
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You might also be interested in these projects:
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* [deromanize](https://www.npmjs.com/package/deromanize): Convert roman numerals to arabic numbers (useful for books, outlines, documentation, slide decks, etc) | [homepage](https://github.com/jonschlinkert/deromanize "Convert roman numerals to arabic numbers (useful for books, outlines, documentation, slide decks, etc)")
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* [randomatic](https://www.npmjs.com/package/randomatic): Generate randomized strings of a specified length using simple character sequences. The original generate-password. | [homepage](https://github.com/jonschlinkert/randomatic "Generate randomized strings of a specified length using simple character sequences. The original generate-password.")
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* [repeat-string](https://www.npmjs.com/package/repeat-string): Repeat the given string n times. Fastest implementation for repeating a string. | [homepage](https://github.com/jonschlinkert/repeat-string "Repeat the given string n times. Fastest implementation for repeating a string.")
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* [romanize](https://www.npmjs.com/package/romanize): Convert numbers to roman numerals (useful for books, outlines, documentation, slide decks, etc) | [homepage](https://github.com/jonschlinkert/romanize "Convert numbers to roman numerals (useful for books, outlines, documentation, slide decks, etc)")
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### Contributors
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| **Commits** | **Contributor** |
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| --- | --- |
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| 28 | [jonschlinkert](https://github.com/jonschlinkert) |
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| 9 | [doowb](https://github.com/doowb) |
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### Author
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**Jon Schlinkert**
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* [github/jonschlinkert](https://github.com/jonschlinkert)
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* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
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### License
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Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
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Released under the [MIT License](LICENSE).
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***
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_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on November 19, 2017._ |