Match Operator

PHP has a control structure named match, which has been introduced as of PHP8.0.

It's like a simplification of the switch control structure.

Example:

$food = 'strawberry';
$description = match ($food) {
  'apple' => 'This food is an apple',
  'strawberry', 'raspberry' => 'This food is a red fruit',
}; // This food is a red fruit

$food = 'unknown';
$description = match ($food) {
  'apple' => 'This food is an apple',
  'strawberry', 'raspberry' => 'This food is a red fruit',
}; // UnhandledMatchError

$food = 'unknown';
$description = match ($food) {
  'apple' => 'This food is an apple',
  'strawberry', 'raspberry' => 'This food is a red fruit',
  default => 'This food is unknown',
}; // This food is unknown

Usage

This package is an attempt to port that control structure to a JS function, the closest possible way.

Example:

import match from 'match-operator'

const food = 'strawberry'
const description = match(food, [
  ['apple', 'This food is an apple'],
  ['strawberry', 'raspberry', 'This food is a red fruit'],
]) // This food is a red fruit

const food = 'unknown'
const description = match(food, [
  ['apple', 'This food is an apple'],
  ['strawberry', 'raspberry', 'This food is a red fruit'],
]) // UnhandledMatchError

const food = 'unknown'
const description = match(food, [
  ['apple', 'This food is an apple'],
  ['strawberry', 'raspberry', 'This food is a red fruit'],
  [match.default, 'This food is unknown']
]) // This food is unknown

Alternate syntax

You can use an array of subjects if you find it more readable.

const description = match(food, [
  [['strawberry', 'raspberry'], 'This food is a red fruit'],
]) 

Installation

npm install match-operator --save # If you're using NPM
yarn add match-operator # If you're using Yarn

Tests

npm run test # If you're using NPM
yarn test # If you're using Yarn

Disclaimer

This is my first Typescript package - please be kind!

License

MIT.