Sep 9, 2021 JavaScript
How to sort an array of dates in JavaScript

In this Article we will go through how to sort an array of dates 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 sortDescending = arr => arr.sort((a, b) => a.getTime() > b.getTime());
const sortAscending = arr => arr.sort((a, b) => a.getTime() < b.getTime());

Sep 9, 2021 JavaScript
How to compare two arrays regardless of order in JavaScript

In this Article we will go through how to compare two arrays regardless of order 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 isEqual = (a, b) => JSON.stringify(a.sort()) === JSON.stringify(b.sort());

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);

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 compare two arrays in JavaScript

In this Article we will go through how to compare two arrays 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 isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);

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

In this Article we will go through how to repeat 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 repeat = (arr, n) => [].concat(...Array(n).fill(arr));

Sep 9, 2021 JavaScript
How to swap two array items in JavaScript

In this Article we will go through how to swap two array items 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 swapItems = (a, i, j) => a[i] && a[j] && [...a.slice(0, i), a[j], ...a.slice(i + 1, j), a[i], ...a.slice(j + 1)] || a;

Sep 9, 2021 JavaScript
How to uncurry a function in JavaScript

In this Article we will go through how to uncurry a function 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 uncurry = (fn, n = 1) => (...args) => (acc => args => args.reduce((x, y) => x(y), acc))(fn)(args.slice(0, n));

Sep 9, 2021 JavaScript
How to encode a url in JavaScript

In this Article we will go through how to encode a url 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 encode = url => encodeURIComponent(url).replace(/!/g, '%21').replace(/~/g, '%7E').replace(/\*/g, '%2A').replace(/'/g, '%27').replace(/\(/g, '%28').replace(/\)/g, '%29').replace(/%20/g, '+');

Sep 9, 2021 JavaScript
How to run promises in sequence in JavaScript

In this Article we will go through how to run promises in sequence 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 run = promises => promises.reduce((p, c) => p.then(rp => c.then(rc => [...rp, rc])), Promise.resolve([]));