DEV Community

Cover image for Mastering JavaScript: Solving Complex Problems with Simplicity
Abdul Rehman
Abdul Rehman

Posted on • Edited on

1

Mastering JavaScript: Solving Complex Problems with Simplicity

Problem 1: Find the Missing Number in an Array

Given an array of consecutive numbers with one missing, find the missing number.

Example:
Input: [1, 2, 4, 5, 6]
Output: 3

Solution:

Image description

Problem 2: Reverse Words in a String

Write a function to reverse the order of words in a given string.

Example:
Input: "JavaScript is fun"
Output: "fun is JavaScript"

Solution:

Image description

Problem 3: Check if a String is a Palindrome

A palindrome is a word or phrase that reads the same forward and backward. Write a function to check if a given string is a palindrome.

Example:
Input: "madam"
Output: true

Solution:

Image description

Problem 4: FizzBuzz

Write a function that prints the numbers from 1 to 100. But for multiples of 3, print "Fizz" instead of the number, and for multiples of 5, print "Buzz". For numbers which are multiples of both 3 and 5, print "FizzBuzz".

Solution:

Image description

Problem 5: Remove Duplicates from an Array

Write a function to remove duplicates from an array.

Example:
Input: [1, 2, 2, 3, 4, 4, 5]
Output: [1, 2, 3, 4, 5]

Solution:

Image description

Heroku

Simplify your DevOps and maximize your time.

Since 2007, Heroku has been the go-to platform for developers as it monitors uptime, performance, and infrastructure concerns, allowing you to focus on writing code.

Learn More

Top comments (0)

👋 Kindness is contagious

Immerse yourself in a wealth of knowledge with this piece, supported by the inclusive DEV Community—every developer, no matter where they are in their journey, is invited to contribute to our collective wisdom.

A simple “thank you” goes a long way—express your gratitude below in the comments!

Gathering insights enriches our journey on DEV and fortifies our community ties. Did you find this article valuable? Taking a moment to thank the author can have a significant impact.

Okay