Sep 9, 2021 JavaScript
How to convert an array of objects to a single object in JavaScript

In this Article we will go through how to convert an array of objects to a single object 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 toObject = (arr, key) => arr.reduce((a, b) => ({ ...a, [b[key]]: b }), {});

Sep 9, 2021 JavaScript
How to convert an array of strings to numbers in JavaScript

In this Article we will go through how to convert an array of strings to numbers 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 toNumbers = arr => arr.map(Number);

Sep 9, 2021 JavaScript
How to count by the properties of an array of objects in JavaScript

In this Article we will go through how to count by the properties of an array of objects 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 countBy = (arr, prop) => arr.reduce((prev, curr) => (prev[curr[prop]] = ++prev[curr[prop]] || 1, prev), {});

Sep 9, 2021 JavaScript
How to cast a value as an array in JavaScript

In this Article we will go through how to cast a value as an array 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 castArray = value => Array.isArray(value) ? value : [value];

Sep 9, 2021 JavaScript
How to check if an array is empty in JavaScript

In this Article we will go through how to check if an array is empty 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 isEmpty = arr => !Array.isArray(arr) || arr.length === 0;

Sep 9, 2021 JavaScript
How to clone an array in JavaScript

In this Article we will go through how to clone an array 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 clone = arr => arr.slice(0);