In this Article we will go through how to delay the evaluation of 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:

// returns a new version of `fn` that returns values as lazy evaluable
const thunkfy = fn => (...args) => () => fn(...args);

In this Article we will go through how to execute a function once 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 once = fn => ((ran = false) => () => ran ? fn : (ran = !ran, fn = fn()))();

In this Article we will go through how to flip the arguments of 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:

// Reverse the order of arguments
const flip = fn => (...args) => fn(...args.reverse());

// For binary functions
const flip = fn => (b, a) => fn(a, b);

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;

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);

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)))();

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);

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));

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;

In this Article we will go through how to calculate the distance between 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:

const distance = (p1, p2) => Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));