Sep 9, 2021 JavaScript
How to identity function in JavaScript

In this Article we will go through how to identity 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 identity = x => x;

Sep 9, 2021 JavaScript
How to logical xor operator in JavaScript

In this Article we will go through how to logical xor operator 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:

// returns `true` if one of the arguments is truthy and the other is falsy

const xor = (a, b) => (a && !b) || (!a && b);

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

In this Article we will go through how to memoize 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 memoize = fn => ((cache = {}) => arg => cache[arg] || (cache[arg] = fn(arg)))();

Sep 9, 2021 JavaScript
How to partially apply a function in JavaScript

In this Article we will go through how to partially apply 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 partial = (fn, ...a) => (...b) => fn(...a, ...b);

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 calculate the angle of a line defined by two points in JavaScript

In this Article we will go through how to calculate the angle of a line defined by two points 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:

// In radians
const radiansAngle = (p1, p2) => Math.atan2(p2.y - p1.y, p2.x - p1.x);

// In degrees
const degreesAngle = (p1, p2) => Math.atan2(p2.y - p1.y, p2.x - p1.x) * 180 / Math.PI;

Sep 9, 2021 JavaScript
How to show an element in JavaScript

In this Article we will go through how to show an element 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 show = ele => ele.style.display = '';

Sep 9, 2021 JavaScript
How to strip html from a given text in JavaScript

In this Article we will go through how to strip html from a given text 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 stripHtml = html => (new DOMParser().parseFromString(html, 'text/html')).body.textContent || '';

Sep 9, 2021 JavaScript
How to toggle an element in JavaScript

In this Article we will go through how to toggle an element 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 toggle = ele => (ele.style.display = (ele.style.display === 'none') ? 'block' : 'none');

Sep 9, 2021 JavaScript
How to box handler in JavaScript

In this Article we will go through how to box handler 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 boxHandler = x => ({ next: f => boxHandler(f(x)), done: f => f(x) });