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authorMinteck <contact@minteck.org>2022-06-04 08:51:19 +0200
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-# to-regex-range [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=W8YFZ425KND68) [![NPM version](https://img.shields.io/npm/v/to-regex-range.svg?style=flat)](https://www.npmjs.com/package/to-regex-range) [![NPM monthly downloads](https://img.shields.io/npm/dm/to-regex-range.svg?style=flat)](https://npmjs.org/package/to-regex-range) [![NPM total downloads](https://img.shields.io/npm/dt/to-regex-range.svg?style=flat)](https://npmjs.org/package/to-regex-range) [![Linux Build Status](https://img.shields.io/travis/micromatch/to-regex-range.svg?style=flat&label=Travis)](https://travis-ci.org/micromatch/to-regex-range)
-
-> Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.
-
-Please consider following this project's author, [Jon Schlinkert](https://github.com/jonschlinkert), and consider starring the project to show your :heart: and support.
-
-## Install
-
-Install with [npm](https://www.npmjs.com/):
-
-```sh
-$ npm install --save to-regex-range
-```
-
-<details>
-<summary><strong>What does this do?</strong></summary>
-
-<br>
-
-This libary generates the `source` string to be passed to `new RegExp()` for matching a range of numbers.
-
-**Example**
-
-```js
-const toRegexRange = require('to-regex-range');
-const regex = new RegExp(toRegexRange('15', '95'));
-```
-
-A string is returned so that you can do whatever you need with it before passing it to `new RegExp()` (like adding `^` or `$` boundaries, defining flags, or combining it another string).
-
-<br>
-
-</details>
-
-<details>
-<summary><strong>Why use this library?</strong></summary>
-
-<br>
-
-### Convenience
-
-Creating regular expressions for matching numbers gets deceptively complicated pretty fast.
-
-For example, let's say you need a validation regex for matching part of a user-id, postal code, social security number, tax id, etc:
-
-* regex for matching `1` => `/1/` (easy enough)
-* regex for matching `1` through `5` => `/[1-5]/` (not bad...)
-* regex for matching `1` or `5` => `/(1|5)/` (still easy...)
-* regex for matching `1` through `50` => `/([1-9]|[1-4][0-9]|50)/` (uh-oh...)
-* regex for matching `1` through `55` => `/([1-9]|[1-4][0-9]|5[0-5])/` (no prob, I can do this...)
-* regex for matching `1` through `555` => `/([1-9]|[1-9][0-9]|[1-4][0-9]{2}|5[0-4][0-9]|55[0-5])/` (maybe not...)
-* regex for matching `0001` through `5555` => `/(0{3}[1-9]|0{2}[1-9][0-9]|0[1-9][0-9]{2}|[1-4][0-9]{3}|5[0-4][0-9]{2}|55[0-4][0-9]|555[0-5])/` (okay, I get the point!)
-
-The numbers are contrived, but they're also really basic. In the real world you might need to generate a regex on-the-fly for validation.
-
-**Learn more**
-
-If you're interested in learning more about [character classes](http://www.regular-expressions.info/charclass.html) and other regex features, I personally have always found [regular-expressions.info](http://www.regular-expressions.info/charclass.html) to be pretty useful.
-
-### Heavily tested
-
-As of April 07, 2019, this library runs [>1m test assertions](./test/test.js) against generated regex-ranges to provide brute-force verification that results are correct.
-
-Tests run in ~280ms on my MacBook Pro, 2.5 GHz Intel Core i7.
-
-### Optimized
-
-Generated regular expressions are optimized:
-
-* duplicate sequences and character classes are reduced using quantifiers
-* smart enough to use `?` conditionals when number(s) or range(s) can be positive or negative
-* uses fragment caching to avoid processing the same exact string more than once
-
-<br>
-
-</details>
-
-## Usage
-
-Add this library to your javascript application with the following line of code
-
-```js
-const toRegexRange = require('to-regex-range');
-```
-
-The main export is a function that takes two integers: the `min` value and `max` value (formatted as strings or numbers).
-
-```js
-const source = toRegexRange('15', '95');
-//=> 1[5-9]|[2-8][0-9]|9[0-5]
-
-const regex = new RegExp(`^${source}$`);
-console.log(regex.test('14')); //=> false
-console.log(regex.test('50')); //=> true
-console.log(regex.test('94')); //=> true
-console.log(regex.test('96')); //=> false
-```
-
-## Options
-
-### options.capture
-
-**Type**: `boolean`
-
-**Deafault**: `undefined`
-
-Wrap the returned value in parentheses when there is more than one regex condition. Useful when you're dynamically generating ranges.
-
-```js
-console.log(toRegexRange('-10', '10'));
-//=> -[1-9]|-?10|[0-9]
-
-console.log(toRegexRange('-10', '10', { capture: true }));
-//=> (-[1-9]|-?10|[0-9])
-```
-
-### options.shorthand
-
-**Type**: `boolean`
-
-**Deafault**: `undefined`
-
-Use the regex shorthand for `[0-9]`:
-
-```js
-console.log(toRegexRange('0', '999999'));
-//=> [0-9]|[1-9][0-9]{1,5}
-
-console.log(toRegexRange('0', '999999', { shorthand: true }));
-//=> \d|[1-9]\d{1,5}
-```
-
-### options.relaxZeros
-
-**Type**: `boolean`
-
-**Default**: `true`
-
-This option relaxes matching for leading zeros when when ranges are zero-padded.
-
-```js
-const source = toRegexRange('-0010', '0010');
-const regex = new RegExp(`^${source}$`);
-console.log(regex.test('-10')); //=> true
-console.log(regex.test('-010')); //=> true
-console.log(regex.test('-0010')); //=> true
-console.log(regex.test('10')); //=> true
-console.log(regex.test('010')); //=> true
-console.log(regex.test('0010')); //=> true
-```
-
-When `relaxZeros` is false, matching is strict:
-
-```js
-const source = toRegexRange('-0010', '0010', { relaxZeros: false });
-const regex = new RegExp(`^${source}$`);
-console.log(regex.test('-10')); //=> false
-console.log(regex.test('-010')); //=> false
-console.log(regex.test('-0010')); //=> true
-console.log(regex.test('10')); //=> false
-console.log(regex.test('010')); //=> false
-console.log(regex.test('0010')); //=> true
-```
-
-## Examples
-
-| **Range** | **Result** | **Compile time** |
-| --- | --- | --- |
-| `toRegexRange(-10, 10)` | `-[1-9]\|-?10\|[0-9]` | _132μs_ |
-| `toRegexRange(-100, -10)` | `-1[0-9]\|-[2-9][0-9]\|-100` | _50μs_ |
-| `toRegexRange(-100, 100)` | `-[1-9]\|-?[1-9][0-9]\|-?100\|[0-9]` | _42μs_ |
-| `toRegexRange(001, 100)` | `0{0,2}[1-9]\|0?[1-9][0-9]\|100` | _109μs_ |
-| `toRegexRange(001, 555)` | `0{0,2}[1-9]\|0?[1-9][0-9]\|[1-4][0-9]{2}\|5[0-4][0-9]\|55[0-5]` | _51μs_ |
-| `toRegexRange(0010, 1000)` | `0{0,2}1[0-9]\|0{0,2}[2-9][0-9]\|0?[1-9][0-9]{2}\|1000` | _31μs_ |
-| `toRegexRange(1, 50)` | `[1-9]\|[1-4][0-9]\|50` | _24μs_ |
-| `toRegexRange(1, 55)` | `[1-9]\|[1-4][0-9]\|5[0-5]` | _23μs_ |
-| `toRegexRange(1, 555)` | `[1-9]\|[1-9][0-9]\|[1-4][0-9]{2}\|5[0-4][0-9]\|55[0-5]` | _30μs_ |
-| `toRegexRange(1, 5555)` | `[1-9]\|[1-9][0-9]{1,2}\|[1-4][0-9]{3}\|5[0-4][0-9]{2}\|55[0-4][0-9]\|555[0-5]` | _43μs_ |
-| `toRegexRange(111, 555)` | `11[1-9]\|1[2-9][0-9]\|[2-4][0-9]{2}\|5[0-4][0-9]\|55[0-5]` | _38μs_ |
-| `toRegexRange(29, 51)` | `29\|[34][0-9]\|5[01]` | _24μs_ |
-| `toRegexRange(31, 877)` | `3[1-9]\|[4-9][0-9]\|[1-7][0-9]{2}\|8[0-6][0-9]\|87[0-7]` | _32μs_ |
-| `toRegexRange(5, 5)` | `5` | _8μs_ |
-| `toRegexRange(5, 6)` | `5\|6` | _11μs_ |
-| `toRegexRange(1, 2)` | `1\|2` | _6μs_ |
-| `toRegexRange(1, 5)` | `[1-5]` | _15μs_ |
-| `toRegexRange(1, 10)` | `[1-9]\|10` | _22μs_ |
-| `toRegexRange(1, 100)` | `[1-9]\|[1-9][0-9]\|100` | _25μs_ |
-| `toRegexRange(1, 1000)` | `[1-9]\|[1-9][0-9]{1,2}\|1000` | _31μs_ |
-| `toRegexRange(1, 10000)` | `[1-9]\|[1-9][0-9]{1,3}\|10000` | _34μs_ |
-| `toRegexRange(1, 100000)` | `[1-9]\|[1-9][0-9]{1,4}\|100000` | _36μs_ |
-| `toRegexRange(1, 1000000)` | `[1-9]\|[1-9][0-9]{1,5}\|1000000` | _42μs_ |
-| `toRegexRange(1, 10000000)` | `[1-9]\|[1-9][0-9]{1,6}\|10000000` | _42μs_ |
-
-## Heads up!
-
-**Order of arguments**
-
-When the `min` is larger than the `max`, values will be flipped to create a valid range:
-
-```js
-toRegexRange('51', '29');
-```
-
-Is effectively flipped to:
-
-```js
-toRegexRange('29', '51');
-//=> 29|[3-4][0-9]|5[0-1]
-```
-
-**Steps / increments**
-
-This library does not support steps (increments). A pr to add support would be welcome.
-
-## History
-
-### v2.0.0 - 2017-04-21
-
-**New features**
-
-Adds support for zero-padding!
-
-### v1.0.0
-
-**Optimizations**
-
-Repeating ranges are now grouped using quantifiers. rocessing time is roughly the same, but the generated regex is much smaller, which should result in faster matching.
-
-## Attribution
-
-Inspired by the python library [range-regex](https://github.com/dimka665/range-regex).
-
-## About
-
-<details>
-<summary><strong>Contributing</strong></summary>
-
-Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
-
-</details>
-
-<details>
-<summary><strong>Running Tests</strong></summary>
-
-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
-```
-
-</details>
-
-<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:
-
-```sh
-$ npm install -g verbose/verb#dev verb-generate-readme && verb
-```
-
-</details>
-
-### Related projects
-
-You might also be interested in these projects:
-
-* [expand-range](https://www.npmjs.com/package/expand-range): Fast, bash-like range expansion. Expand a range of numbers or letters, uppercase or lowercase. Used… [more](https://github.com/jonschlinkert/expand-range) | [homepage](https://github.com/jonschlinkert/expand-range "Fast, bash-like range expansion. Expand a range of numbers or letters, uppercase or lowercase. Used by micromatch.")
-* [fill-range](https://www.npmjs.com/package/fill-range): Fill in a range of numbers or letters, optionally passing an increment or `step` to… [more](https://github.com/jonschlinkert/fill-range) | [homepage](https://github.com/jonschlinkert/fill-range "Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`")
-* [micromatch](https://www.npmjs.com/package/micromatch): Glob matching for javascript/node.js. A drop-in replacement and faster alternative to minimatch and multimatch. | [homepage](https://github.com/micromatch/micromatch "Glob matching for javascript/node.js. A drop-in replacement and faster alternative to minimatch and multimatch.")
-* [repeat-element](https://www.npmjs.com/package/repeat-element): Create an array by repeating the given value n times. | [homepage](https://github.com/jonschlinkert/repeat-element "Create an array by repeating the given value n times.")
-* [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.")
-
-### Contributors
-
-| **Commits** | **Contributor** |
-| --- | --- |
-| 63 | [jonschlinkert](https://github.com/jonschlinkert) |
-| 3 | [doowb](https://github.com/doowb) |
-| 2 | [realityking](https://github.com/realityking) |
-
-### Author
-
-**Jon Schlinkert**
-
-* [GitHub Profile](https://github.com/jonschlinkert)
-* [Twitter Profile](https://twitter.com/jonschlinkert)
-* [LinkedIn Profile](https://linkedin.com/in/jonschlinkert)
-
-Please consider supporting me on Patreon, or [start your own Patreon page](https://patreon.com/invite/bxpbvm)!
-
-<a href="https://www.patreon.com/jonschlinkert">
-<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" height="50">
-</a>
-
-### License
-
-Copyright © 2019, [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), v0.8.0, on April 07, 2019._ \ No newline at end of file