In JavasScript, an array is a very common data structure. We use it almost daily. In this post, we share some awesome JavaScript One-Liners code for array objects to make your frontend development life easier.

Convert an array to a string

array.join(",")

Convert an object to an array

Object.values(object)

Create a new array with a range

Array.from({ length: n }, (_, i) => i)

Check if a variable is an array

Array.isArray(variable)

Check if an array is empty

array.length === 0

Find the max value in an array

Math.max(...array)

Find the minimum value in an array

Math.min(...array)

Remove duplicates from an array

[...new Set(array)]

Count the occurrences of an element in an array

array.filter(x => x === element).length

Get the sum of all the numbers in an array

array.reduce((a, b) => a + b, 0));