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fromfrom

(★ 481)

A JS library written in TS to transform sequences of data from format to another

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- benchmark.ts
- - styles.css
- index.html
- playground.html
- tsconfig.json
- typedoc.js
- webpack.config.js
- webpack.config.prod.js
- - concat.ts
  - distinct.ts
  - filter.ts
  - flatMap.ts
  - groupBy.ts
  - map.ts
  - prepend.ts
  - reverse.ts
  - skip.ts
  - skipWhile.ts
  - sortBy.ts
  - take.ts
  - takeWhile.ts
  - without.ts
- fromfrom.ts
- ObjectIterable.ts
- Sequence.ts
- types.ts
- utils.ts
- fromfrom.test.ts
- gh-pages-publish.ts
- semantic-release-prepare.ts
.all-contributorsrc
.editorconfig
.gitignore
.prettierrc.json
.releaserc.json
.travis.yml
CHANGELOG.md
code-of-conduct.md
CONTRIBUTING.md
LICENSE
package-lock.json
package.json
README.md
rollup.config.ts
TODO.md
tsconfig.benchmark.json
tsconfig.declarations.json
tsconfig.json
tslint.json

# Installation Guide

1. Get the code

git clone https://github.com/tomi/fromfrom

Downloads the entire project code from GitHub to your computer.

cd fromfrom

Moves into the project folder you just downloaded.

2. Node.js

Easy Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Node.js Node.js must be installed to use npm. The LTS version is recommended.

npm install --save fromfrom

Downloads and installs the libraries listed in package.json.

✅ After running the command, open the address shown in the terminal (usually something like http://localhost:3000) in your browser.

Pulled directly from this repo's README.

// repository documentation

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# fromfrom

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[![Sponsored](https://img.shields.io/badge/chilicorn-sponsored-brightgreen.svg?logo=data%3Aimage%2Fpng%3Bbase64%2CiVBORw0KGgoAAAANSUhEUgAAAA4AAAAPCAMAAADjyg5GAAABqlBMVEUAAAAzmTM3pEn%2FSTGhVSY4ZD43STdOXk5lSGAyhz41iz8xkz2HUCWFFhTFFRUzZDvbIB00Zzoyfj9zlHY0ZzmMfY0ydT0zjj92l3qjeR3dNSkoZp4ykEAzjT8ylUBlgj0yiT0ymECkwKjWqAyjuqcghpUykD%2BUQCKoQyAHb%2BgylkAyl0EynkEzmkA0mUA3mj86oUg7oUo8n0k%2FS%2Bw%2Fo0xBnE5BpU9Br0ZKo1ZLmFZOjEhesGljuzllqW50tH14aS14qm17mX9%2Bx4GAgUCEx02JySqOvpSXvI%2BYvp2orqmpzeGrQh%2Bsr6yssa2ttK6v0bKxMBy01bm4zLu5yry7yb29x77BzMPCxsLEzMXFxsXGx8fI3PLJ08vKysrKy8rL2s3MzczOH8LR0dHW19bX19fZ2dna2trc3Nzd3d3d3t3f39%2FgtZTg4ODi4uLj4%2BPlGxLl5eXm5ubnRzPn5%2Bfo6Ojp6enqfmzq6urr6%2Bvt7e3t7u3uDwvugwbu7u7v6Obv8fDz8%2FP09PT2igP29vb4%2BPj6y376%2Bu%2F7%2Bfv9%2Ff39%2Fv3%2BkAH%2FAwf%2FtwD%2F9wCyh1KfAAAAKXRSTlMABQ4VGykqLjVCTVNgdXuHj5Kaq62vt77ExNPX2%2Bju8vX6%2Bvr7%2FP7%2B%2FiiUMfUAAADTSURBVAjXBcFRTsIwHAfgX%2FtvOyjdYDUsRkFjTIwkPvjiOTyX9%2FAIJt7BF570BopEdHOOstHS%2BX0s439RGwnfuB5gSFOZAgDqjQOBivtGkCc7j%2B2e8XNzefWSu%2BsZUD1QfoTq0y6mZsUSvIkRoGYnHu6Yc63pDCjiSNE2kYLdCUAWVmK4zsxzO%2BQQFxNs5b479NHXopkbWX9U3PAwWAVSY%2FpZf1udQ7rfUpQ1CzurDPpwo16Ff2cMWjuFHX9qCV0Y0Ok4Jvh63IABUNnktl%2B6sgP%2BARIxSrT%2FMhLlAAAAAElFTkSuQmCC)](http://spiceprogram.org/oss-sponsorship)
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fromfrom is a [LINQ](https://en.wikipedia.org/wiki/Language_Integrated_Query) inspired library to transform sequences of data.

## Installation

```bash
npm install --save fromfrom
```

## Documentation

Find it [here](https://tomi.github.io/fromfrom/).

## Usage

The library exports only a single function, [`from`](https://tomi.github.io/fromfrom/api/index.html#from). [`from`](https://tomi.github.io/fromfrom/api/index.html#from) wraps the given source data into a [`Sequence`](https://tomi.github.io/fromfrom/api/classes/sequence.html). [`Sequence`](https://tomi.github.io/fromfrom/api/classes/sequence.html) has a wide range of chainable methods to operate and transform the sequence. The sequence can then be converted into a JS type.

For example

```ts
import { from } from "fromfrom";

// Transform an array of users
const users = [
  { id: 1, name: "John", age: 31, active: true },
  { id: 2, name: "Jane", age: 32, active: false },
  { id: 3, name: "Luke", age: 33, active: false },
  { id: 4, name: "Mary", age: 34, active: true },
];

from(users)
  .filter(user => user.active)
  .sortByDescending(user => user.age)
  .toArray();
// Returns
// [
//   { id: 4, name: "Mary", age: 34, active: true },
//   { id: 1, name: "John", age: 31, active: true }
// ]
```

## Features

- **Familiar method names** - Even though it's LINQ inspired, uses familiar method names from JS.
- **Supports all main JS types** - Works with arrays, objects, maps, sets, and objects that implement the [iterable protocol](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols).
- **No dependencies** - Guarantees small size.
- **Type safe** - Written in TypeScript. Type definitions included.
- **Deferred execution** - The execution of the sequence is deferred until you begin consuming the sequence.
- **Fully tested** - 100% test coverage.

## How does it work

See "how does it work" section from the initial [release blog post](https://github.com/tomi/fromfrom/wiki/Announcing-fromfrom#how-does-it-work).

## Development

### NPM scripts

- `npm t`: Run test suite
- `npm start`: Run `npm run build` in watch mode
- `npm run test:watch`: Run test suite in [interactive watch mode](http://facebook.github.io/jest/docs/cli.html#watch)
- `npm run test:prod`: Run linting and generate coverage
- `npm run build`: Generate bundles and typings, create docs
- `npm run lint`: Lints code
- `npm run commit`: Commit using conventional commit style ([husky](https://github.com/typicode/husky) will tell you to use it if you haven't :wink:)

## Acknowledgement

Made with :heart: by [@TomiTurtiainen](https://twitter.com/TomiTurtiainen).

This project is a grateful recipient of the [Futurice Open Source sponsorship program](https://spiceprogram.org). :heart:

Forked from [TypeScript library starter](https://github.com/alexjoverm/typescript-library-starter)

## Contributors ✨

Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):

<table>
  <tr>
    <td align="center"><a href="https://github.com/tomi"><img src="https://avatars2.githubusercontent.com/u/10324676?v=4" width="100px;" alt=""/><br /><sub><b>Tomi Turtiainen</b></sub></a><br /><a href="https://github.com/tomi/fromfrom/commits?author=tomi" title="Code">💻</a> <a href="https://github.com/tomi/fromfrom/commits?author=tomi" title="Documentation">📖</a> <a href="#infra-tomi" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="https://github.com/tomi/fromfrom/commits?author=tomi" title="Tests">⚠️</a></td>
    <td align="center"><a href="https://github.com/jtenner"><img src="https://avatars1.githubusercontent.com/u/3761339?v=4" width="100px;" alt=""/><br /><sub><b>jtenner</b></sub></a><br /><a href="https://github.com/tomi/fromfrom/commits?author=jtenner" title="Code">💻</a> <a href="https://github.com/tomi/fromfrom/commits?author=jtenner" title="Tests">⚠️</a> <a href="https://github.com/tomi/fromfrom/commits?author=jtenner" title="Documentation">📖</a></td>
    <td align="center"><a href="https://vaaralav.com"><img src="https://avatars0.githubusercontent.com/u/8571541?v=4" width="100px;" alt=""/><br /><sub><b>Ville Vaarala</b></sub></a><br /><a href="#maintenance-vaaralav" title="Maintenance">🚧</a></td>
    <td align="center"><a href="https://github.com/dogoku"><img src="https://avatars0.githubusercontent.com/u/761999?v=4" width="100px;" alt=""/><br /><sub><b>Theo</b></sub></a><br /><a href="https://github.com/tomi/fromfrom/commits?author=dogoku" title="Code">💻</a></td>
    <td align="center"><a href="https://github.com/hollannikas"><img src="https://avatars0.githubusercontent.com/u/9109662?v=4" width="100px;" alt=""/><br /><sub><b>Rudolf Poels</b></sub></a><br /><a href="https://github.com/tomi/fromfrom/commits?author=hollannikas" title="Documentation">📖</a></td>
    <td align="center"><a href="https://github.com/andrew-w-ross"><img src="https://avatars2.githubusercontent.com/u/14924726?v=4" width="100px;" alt=""/><br /><sub><b>Andrew Ross</b></sub></a><br /><a href="https://github.com/tomi/fromfrom/issues?q=author%3Aandrew-w-ross" title="Bug reports">🐛</a></td>
  </tr>
</table>

This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!