| 12345678910111213141516171819202122232425262728293031323334353637 |
- # @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' ]);
- ```
|
