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 flatten 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 flat = arr => [].concat.apply([], arr.map(a => Array.isArray(a) ? flat(a) : a));

In this Article we will go through how to get all arrays of consecutive elements 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 getConsecutiveArrays = (arr, size) => size > arr.length ? [] : arr.slice(size - 1).map((_, i) => arr.slice(i, size + i));

In this Article we will go through how to get all n-th items 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 getNthItems = (arr, nth) => arr.filter((_, i) => i % nth === nth - 1);

In this Article we will go through how to get all subsets 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 getSubsets = arr => arr.reduce((prev, curr) => prev.concat(prev.map(k => k.concat(curr))), [[]]);