# blank-object

> A faster alternative to Object.create(null)

Latest version **1.0.2** (published 2016-08-06) · MIT license · 0 weekly downloads

## Install

```sh
npm install blank-object
pnpm add blank-object
yarn add blank-object
bun add blank-object
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.2 |
| Published | 2016-08-06 |
| First published | 2015-09-04 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 1 |
| Author | Stefan Penner |
| Maintainers | ember, krisselden, stefanpenner |

## Links

- npm: https://www.npmjs.com/package/blank-object
- Repository: https://github.com/stefanpenner/blank-object
- Homepage: https://github.com/stefanpenner/blank-object#readme
- Issues: https://github.com/stefanpenner/blank-object/issues
- npm.io page: https://npm.io/package/blank-object

## Recent versions

- 1.0.2 (latest) — 2016-08-06
- 1.0.1 — 2015-09-04
- 1.0.0 — 2015-09-04

## README

# blank-object

Object.create(null) turns out to be quite slow to alloc in v8, but instead if
we inherit from an ancestory with `proto = create(null)` we have nearly
the same functionallity but with dramatically faster alloc.

```js
var BlankObject = require('blank-object');

var bo = new BlankObject();
```

This is designed for a presence check `map[key] !== undefined` since `in` is also slow like `hasOwnProperty`, `delete` and `Object.create`.

```js
function UNDEFINED() {}
export default class Map {
  constructor() {
    this.store = new BlankObject();
  }

  has(key) {
    return this.store[key] !== undefined;
  }

  get(key) {
    let val = this.store[key];
    return val === UNDEFINED ? undefined : val;
  }

  set(key, val) {
    this.store[key] = val === undefined ? UNDEFINED : val;
  }
}
```

---
_Source: https://npm.io/package/blank-object · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._