ECMAScript Compose - Javascript

ECMAScript Compose is a combination of different functional programming concepts in Javascript. It provides developers with the ability to write clean, decoupled, and reusable code. This library simplifies the composition of functions in Javascript by providing utility functions like pipe and compose.

Installation

ECMAScript Compose is available on npm and can be installed with the following command:

npm install ecmascript-compose

Usage

After installation, to use ECMAScript Compose in your application:

import { compose } from 'ecmascript-compose'; // It will import only compose function

Composing Functions

Composition is a process of combining functions to create a more complex function. ECMAScript Compose provides two utility functions:

1. pipe: The pipe function composes a series of functions, whereas each function takes the output of the previous function as an argument.
2. compose: The compose function composes a series of functions, whereas each function takes the output of the next function as an argument.

pipe

The pipe function is used to compose a series of functions. The output of the initial function is passed as an argument to the next function in the sequence.

import { pipe } from 'ecmascript-compose';

const add = (a, b) => a + b;
const multiply = (a, b) => a * b;
const double = (a) => multiply(a, 2);
const triple = (a) => multiply(a, 3);

const result = pipe(
  add,
  double,
  triple,
)(1, 2);

console.log(result); // (1 + 2) * 2 * 3 = 18

compose

The compose function is used to compose a series of functions. The output of the last function is passed as an argument to the next function in the sequence.

import { compose } from 'ecmascript-compose';

const add = (a, b) => a + b;
const multiply = (a, b) => a * b;
const double = (a) => multiply(a, 2);
const triple = (a) => multiply(a, 3);

const result = compose(
  triple,
  double,
  add,
)(1, 2);

console.log(result); // (1 + 2) * 2 * 3 = 18

Conclusion

ECMAScript Compose is a powerful tool that provides developers with improved code reuse and maintainability. It simplifies the composition of functions in Javascript and allows developers to write cleaner and more expressive code. Try it today and see the difference for yourself!