https://github.com/sophiebits/match-at

Relocatable regular expressions.
https://github.com/sophiebits/match-at

Last synced: 2 months ago
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Relocatable regular expressions.

• Host: GitHub
• URL: https://github.com/sophiebits/match-at
• Owner: sophiebits
• License: mit
• Created: 2015-03-26T21:15:32.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2017-09-06T02:02:13.000Z (over 7 years ago)
• Last Synced: 2024-04-25T02:41:43.110Z (9 months ago)
• Language: JavaScript
• Size: 27.3 KB
• Stars: 8
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# match-at [![Build Status](https://travis-ci.org/spicyj/match-at.svg?branch=master)](https://travis-ci.org/spicyj/match-at)

## Introduction

Like `String.prototype.match` if it only checked the regex at the given index instead of searching the entire string.

```js

matchAt(/world/, 'hello world', 6);  // ['world']

matchAt(/world/, 'hello world', 0);  // null

```

Almost like `'hello world'.slice(i).match(/^world/)` except the resulting match object's `.index` property corresponds to the original string, and it doesn't actually slice the string. Most engines optimize taking a substring so this probably isn't particularly valuable in practice, but it was an entertaining exercise and could be useful if you reminisce about these semantics.

## License

MIT.