@undercut/web-2019

A precompiled version of the Undercut packages for web browsers not older than 2019-01-01. Contains pull, push, and utils entries. An easy way to try Undercut when your project has no build step or you're doing a quick experiment.

Lazy data processing, pipelines, and language utilities built around native JS features and protocols.

Based on existing JS protocols and language features
Balanced API: not too imperative, not too functional
Various language utilities to use as a Standard Library
Composability and extensibility by design
Custom operations in a couple of lines
Lazy evaluation when possible
No external dependencies
TypeScript in JSDoc

Please visit undercut.js.org for broader overview and documentation.

Usage

Usage is similar to the original ESM packages.

Import desired entry first:

// When using as a script tag and its global variable:
const { pullArray, filter, map, skip } = undercut.pull;
// When using as a CommonJS module:
const { pullArray, filter, map, skip } = require("@undercut/web-2019/pull");
// When using as an AMD module:
require(["scripts/undercut/pull.js"], function ({ pullArray, filter, map, skip }) {
    /* Your code */
});

And then use it in your code:

const source = [1, 2, 3, 4, 5, 6, 7];

const result = pullArray([
    skip(2),
    filter(x => x % 3),
    map(x => x * 2) // Will be executed only 3 times.
], source);

console.log(result); // [8, 10, 14]

console.log(isNumberValue(123)); // true
console.log(isNumberValue("hello")); // false
console.log(isNumberValue(NaN)); // false

Prerequisites

You need to import core-js@3 (or another similar polyfill) before you import Undercut:

<!-- index.html -->
<script src="https://unpkg.com/core-js-bundle@^3/minified.js"></script>

Installation

Install the npm package if you're using some kind of a bundler:

npm install @undercut/web-2019
# or
yarn add @undercut/web-2019

Or use the unpkg CDN to import scripts by their URLs:

<script src="https://unpkg.com/@undercut/web-2019/pull.js"></script>
<script src="https://unpkg.com/@undercut/web-2019/push.js"></script>
<script src="https://unpkg.com/@undercut/web-2019/utils.js"></script>

You may also try Yarn aliases for convenience:

yarn add undercut@npm:@undercut/web-2019

Updating

If you're upgrading @undercut/web-2019 to a newer version, please upgrade core-js to the latest version too.

License

Licensed under the MIT License, see LICENSE for more information.