§ Quick Take
import { strict as assert } from "assert";
import raReg from "ranges-regex";
const oldString = `The quick brown fox jumps over the lazy dog.`;
const result = raReg(/the/gi, oldString);
// all regex matches, but in Ranges notation (see codsen.com/ranges/):
assert.deepEqual(result, [
[0, 3],
[31, 34],
]);
// if you slice the ranges, you'll get original regex caught values:
assert.deepEqual(
result.map(([from, to]) =>
oldString.slice(from, to)
),
["The", "the"]
);
§ Examples
- program example: Clashing Replacement Values
- program example: Nothing Was Found
- program example: Replacing Values
§ Purpose
Takes a string, matches the given regex on it and returns ranges which would do the same thing.
Similarly to String.prototype.match(), a no-results case will yield null (which ranges-merge and others would gladly accept).
§ API
raReg( regexp, str, [replacement] )
In other words, it's a function which takes three input arguments, third one is optional (marked with square brackets).
| Input argument | Type | Obligatory? | Description |
|---|---|---|---|
regexp | Regular expression | yes | Provide the regexp to apply onto a string |
str | String | yes | Provide a string upon which to match the regex |
replacement | String or null | no | If you want to add a third argument on every of the finding's third argument values, put it here. |
Output: array of zero or more arrays (so-called ranges) where each consists of two or more natural number (or zero) indexes OR null.
You can use all the features of regexes: global, case insensitive flags and so on.
This package does not mutate its inputs.
If the input arguments' types are incorrect or absent, library will throw an error.
§ Changelog
See it in the monorepo , on Sourcehut.
§ Licence
Copyright © 2010–2020 Roy Revelt and other contributors