https://github.com/jridgewell/set-array

https://github.com/jridgewell/set-array

Last synced: 2 months ago
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• Host: GitHub
• URL: https://github.com/jridgewell/set-array
• Owner: jridgewell
• License: mit
• Created: 2022-04-23T22:19:06.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-02-29T06:06:52.000Z (10 months ago)
• Last Synced: 2024-10-13T21:12:53.850Z (2 months ago)
• Language: TypeScript
• Homepage:
• Size: 382 KB
• Stars: 3
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# @jridgewell/set-array

> Like a Set, but provides the index of the `key` in the backing array

This is designed to allow synchronizing a second array with the contents of the backing array, like

how in a sourcemap `sourcesContent[i]` is the source content associated with `source[i]`, and there

are never duplicates.

## Installation

```sh

npm install @jridgewell/set-array

```

## Usage

```js

import { SetArray, get, put, pop } from '@jridgewell/set-array';

const sa = new SetArray();

let index = put(sa, 'first');

assert.strictEqual(index, 0);

index = put(sa, 'second');

assert.strictEqual(index, 1);

assert.deepEqual(sa.array, [ 'first', 'second' ]);

index = get(sa, 'first');

assert.strictEqual(index, 0);

pop(sa);

index = get(sa, 'second');

assert.strictEqual(index, undefined);

assert.deepEqual(sa.array, [ 'first' ]);

```