string-match-left-right

Match substrings on the left or right of a given index, ignoring whitespace

Usage no npm install needed!

<script type="module">
  import stringMatchLeftRight from 'https://cdn.skypack.dev/string-match-left-right';
</script>

README

string-match-left-right

Match substrings on the left or right of a given index, ignoring whitespace

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Install

The latest version is ESM only: Node 12+ is needed to use it and it must be imported instead of required. If your project is not on ESM yet and you want to use require, use an older version of this program, 7.1.0.

npm i string-match-left-right

Quick Take

import { strict as assert } from "assert";

import {
  matchLeftIncl,
  matchRightIncl,
  matchLeft,
  matchRight,
} from "string-match-left-right";

// 3rd character is "d" because indexes start from zero.
// We're checking the string to the left of it, "bcd", inclusive of current character ("d").
// This means, "bcd" has to end with existing character and the other chars to the left
// must match exactly:
assert.equal(matchLeftIncl("abcdefghi", 3, ["bcd"]), "bcd");

// neither "ab" nor "zz" are to the left of 3rd index, "d":
assert.equal(matchLeft("abcdefghi", 3, ["ab", `zz`]), false);

// "def" is to the right of 3rd index (including it), "d":
assert.equal(matchRightIncl("abcdefghi", 3, ["def", `zzz`]), "def");

// One of values, "ef" is exactly to the right of 3rd index, "d":
assert.equal(matchRight("abcdefghi", 3, ["ef", `zz`]), "ef");

Documentation

Please visit codsen.com for a full description of the API.

Contributing

To report bugs or request features or assistance, raise an issue on GitHub.

Licence

MIT License

Copyright (c) 2010-2022 Roy Revelt and other contributors

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