Package Exports

javascript-either
javascript-either/src/index.js

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Readme

Either Implementation

English

Introduction

This implementation represents a type that can hold either a value of type L (Left) or a value of type R (Right). It is a common pattern in functional programming to handle computations that can result in two different types of outcomes, such as success or failure.

Usage

Creating an `Either` instance

To create an Either instance, you can use the static methods left and right:

const { Either } = require('./either');

// Create a Left value
const leftValue = Either.left('Error occurred');

// Create a Right value
const rightValue = Either.right(42);

Checking the type of the value

if (leftValue.isLeft) {
  console.log('This is a Left value');
}

if (rightValue.isRight) {
  console.log('This is a Right value');
}

Output

const left = leftValue.left(); // 'Error occurred'
const right = rightValue.right(); // 42

javascript-either