HackerRank Counting Valleys - Solution Walkthrough (JavaScript)

I did almost the same code in c++, however I check for sea level = 0 after processing each step. If SL==0 and our previous step was UP, we must have been in a valley.

wrong solution ... need improvement

Hey but if I have [UUUUDDUD] then I won't be able to check -1. I'm confused. Thanks for the video btw.

thank you

2 hours later.... Thank you. Didn't think about the only previous direction to count will be going up to 0 by 1 step so track if value == -1. Thank yoU!

Thanks nice solution

I'd do the check of elevation === -1 after I decrease the elevation. The reason for this is that every time the elevation goes down from 0 to -1 it'll count as a valley. If you step with the debugger you'll see that I mean. Either way, it was a great explanation.

I tried this problem using Regex but it only passed some of the test cases

Hope I do good in today's job interview. I'm sharing this everywhere man, thanks

Very nicely explained.