prelude-js

A standard module for functional programming in JavaScript.

What

A minimalist collection of functions to support functional programming.

For example, it includes the following:

• Methods of built-in data types as functions.

  If you wanted to apply trim to all elements of a string[], you would do something like this:

  const runtime = [" deno ", " node.js"].map((v) => v.trim());

  Use string#trim.

  import { trim } from "https://deno.land/x/prelude_js@$VERSION/string.ts";
  const runtime = [" deno ", " node.js"].map(trim);

Method as function

Methods are provided as functions from built-in data types.

The independence of methods as functions is convenient for functional programming.

endpoint

Endpoints are provided with the following rules.

import * as methods from "https://deno.land/x/prelude_js@$VERSION/<data_type>.ts";

where <data_type> denotes the data type.

For example:

• string
• number
• object

You can import any module you like via namespace import or named import.

import * as String from "https://deno.land/x/prelude_js@$VERSION/string.ts";
import { trim } from "https://deno.land/x/prelude_js@$VERSION/string.ts";
String.trim(" hello ");
trim(" world ");

string

import * as String from "https://deno.land/x/prelude_js@$VERSION/string.ts";

• at
• charAt
• charCodeAt
• codePointAt
• concat
• indexOf
• lastIndexOf
• localeCompare
• match
• search
• slice
• split
• substring
• toLowerCase
• toLocaleLowerCase
• toUpperCase
• toLocaleUpperCase
• trim
• valueOf
• trimStart
• trimEnd
• length

number

import * as Number from "https://deno.land/x/prelude_js@$VERSION/number.ts";

• toFixed
• toExponential
• toPrecision
• valueOf

bigint

import * as Bigint from "https://deno.land/x/prelude_js@$VERSION/bigint.ts";

• toString
• toLocaleString
• valueOf

object

import * as Object from "https://deno.land/x/prelude_js@$VERSION/object.ts";

• constructor
• toString
• toLocaleString
• valueOf

License

Copyright © 2022-present TomokiMiyauci.

Released under the MIT license