In this Article we will go through how to get the rank of an array of 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 ranking = (arr) => arr.map((x, y, z) => z.filter(w => w > x).length + 1);

In this Article we will go through how to get the sum of an array of 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 sum = arr => arr.reduce((a, b) => a + b, 0);

In this Article we will go through how to get the unique values of 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 unique = arr => [...new Set(arr)];

In this Article we will go through how to get union of 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 union = (...arr) => [...new Set(arr.flat())];

In this Article we will go through how to group an array of objects by a key 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 groupBy = (arr, key) => arr.reduce((acc, item) => ((acc[item[key]] = [...(acc[item[key]] || []), item]), acc), {});

In this Article we will go through how to merge 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:

// Merge but don't remove the duplications
const merge = (a, b) => a.concat(b);

In this Article we will go through how to partition an array based on a condition 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 partition = (arr, criteria) => arr.reduce((acc, i) => (acc[criteria(i) ? 0 : 1].push(i), acc), [[], []]);

In this Article we will go through how to remove duplicate values in 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 removeDuplicate = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));

In this Article we will go through how to remove falsy values from 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 removeFalsy = arr => arr.filter(Boolean);

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));