JavaScript Coding Challenges - Practice Your Skills

Let's create a function that reverses a string! This is a fundamental string manipulation exercise that will help you understand how to work with strings in JavaScript.

A palindrome is a word that reads the same forwards and backwards. Let's build a function to detect them!

Write a function that finds the largest number in an array without using Math.max().

Write a function that counts the number of vowels (a, e, i, o, u) in a string.

Write a function that capitalizes the first letter of each word in a sentence.

Let's practice array operations by calculating the sum of all numbers in an array!

Write a function that returns "Fizz" for multiples of 3, "Buzz" for multiples of 5, "FizzBuzz" for multiples of both, or the number itself otherwise.

Write a function that returns the nth number in the Fibonacci sequence. The sequence starts with 0 and 1.

Write a function that removes duplicate values from an array and returns a new array with unique values.

Write a function that checks if two strings are anagrams (contain the same characters in different order).

Prime numbers are the building blocks of mathematics! Let's create an efficient algorithm to detect them.

Write a function that merges two sorted arrays into one sorted array.

Implement binary search to find the index of a target value in a sorted array. Return -1 if not found.

Write a function that flattens a nested array of any depth into a single-level array.

Implement a debounce function that delays invoking a function until after a specified time has elapsed since the last time it was invoked.

Write a function that creates a deep copy of an object, including nested objects and arrays.

Create a memoize function that caches the results of expensive function calls.

Implement a throttle function that ensures a function is called at most once in a specified time period.