Reverse a String

JavaScript

Technical Specification

Given a string, return a new string with the characters in reverse order.

Input/Output Samples

Input:"hello"

Output:"olleh"

Input:"happy"

Output:"yppah"

Optimal Logic Path

function reverseString(str) {
  return str.split("").reverse().join("");
}

Architectural Deep-Dive

We split the string into an array of characters, reverse the array using the built-in method, and then join it back into a string.