Coding challenges are a common part of the interview process for software engineering roles. They are meant to assess your skills and see how you think when faced with a problem. In this post, we will discuss some common JavaScript coding challenges and how to solve them!
Problem #01: Reverse a String
The first problem we will discuss is reversing a string. This can be done using the Array.reverse() method. For example, if you had the string “Hello”, you could reverse it by running the following code:
var reversed = “olleH”.reverse();
console.log(reversed); // prints out “elloH”
This approach will work for any string, regardless of its length.
Problem #02: Find the Largest Number in an Array
The next problem we will discuss is finding the largest number in an array. This can be done using the Math.max() function. For example, if you had the following array:
var numbers = [11, 22, 33, 44];
console.log(Math.max(numbers)); // prints out 44
This approach will work for any type of number, regardless of its size.
Problem #03: Find the Smallest Number in an Array
The next problem we will discuss is finding the smallest number in an array. This can be done using the Math.min() function. For example, if you had the following array:
var numbers = [11, 22, 33, 44];
console.log(Math.min(numbers)); // prints out 11
This approach will work for any type of number, regardless of its size.
Problem #04: Find the Longest Word in a String
The next problem we will discuss is finding the longest word in a string. This can be done using split() and sort(). For example, if you had this sentence: “I love coding” , you could find its longest word by running the following code:
var words = “I love coding”.split(“”); // [“I”, “love”, “coding”];
words.sort(function (a, b) { return b -a }); // Sorts from largest to smallest based on character count (“love” > “coding”));
console.log(words[0]); // prints out ‘coding’
This approach will work for any string, regardless of its length.
Problem #05: Find the Shortest Word in a String
The next problem we will discuss is finding the shortest word in a string. This can be done using split() and sort(). For example, if you had this sentence: “I love coding” , you could find its shortest word by running the following code:
var words = “I love coding”.split(“”); // [“I”, “love”, “coding”];
words.sort(function (a, b) { return a -b }); // Sorts from smallest to largest based on character count (“i” > “love”));
console.log(words[0]); // prints out ‘I’
This approach will work for any string, regardless of its length.
Are you feeling confident about your ability to ace a JavaScript coding challenge in an interview? If not, don’t worry. We’ve put together a few tips that will help you shine when it comes time to show off your coding skills.