Interview Question #2:
Write a function that reverses a string❓🤔
If you need practice, try to solve this on your own. I have included 3 potential solutions below.
Note: There are many other potential solutions to this problem.
Feel free to bookmark 🔖 even if you don't need this for now. You may need to refresh/review down the road when it is time for you to look for a new role.
Code: https://codepen.io/angelo_jin/pen/LYBPrKo
Solution #1: Array methods
- very simple solution that will utilize array methods to reverse the string.
function reverseString(str) {
return str.split("").reverse().join("");
}
Solution #2: Array forEach
- will cycle through each characters and push it on the temp variable created one by one in reversed order.
function reverseString(str) {
let reversedString = ''
str.split('').forEach(char => {
reversedString = char + reversedString
})
return reversedString
}
Solution #3: Array reduce
- slightly better than second solution above. Will use reduce and add the result to the empty string in reverse.
function reverseString(str) {
return str.split('')
.reduce((prev, curr) => curr + prev, '')
}
Happy coding and good luck if you are interviewing!
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Top comments (4)
You can use stack concept to reverse the string.
One more simple solution using length and traversing backwards.
definitely a good possibility in my opinion. I got asked to code it on my last job but it is not to extreme like accounting for unicode. It was something quick and straight to the point. I imagine myself to not continue the interview if interview would go to this extreme. LOL
I wrote an article about FIzz Buzz as well, should be in this series and I was shocked to find out he was asked about it on his recent interview.
Maybe junior level can be asked perhaps?
thanks for the complete solution! definitely appreciate your time adding this in and spreading the knowledge.
I would be very surprised if I get asked to take unicode character into account in an interview though.
I totally agree with you. Might be more accurate to say companies HAVE moved away from FizzBuzz interview questions.