In this Article we will go through how to find the index of the last matching item 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 lastIndex = (arr, predicate) => arr.reduce((prev, curr, index) => predicate(curr) ? index : prev, -1);

In this Article we will go through how to find the index of the maximum item 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 indexOfMax = arr => arr.reduce((prev, curr, i, a) => curr > a[prev] ? i : prev, 0);

In this Article we will go through how to cast a value as 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 castArray = value => Array.isArray(value) ? value : [value];

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;

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);

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());