How to generate a hash of a string in JavaScript

In this Article we will go through how to generate a hash of a string only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const hash = str => str.split('').reduce((prev, curr) => Math.imul(31, prev) + curr.charCodeAt(0) | 0, 0);

const hash = str => str.split('').reduce((prev, curr) => (((prev << 5) - prev) + curr.charCodeAt(0)) | 0, 0);

hash('hello');      // 99162322