Design a Moving Average Class for Data Stream
Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. Example: MovingAverage m = new MovingAverage(3); m.next(1) = 1 …
3 Ways to Protect Your Website from Negative SEO
Search Engine Optimization (SEO) techniques are set to make your website appear on top of search engine results pages (SERP). These are the healthy ways your website can use …
Algorithm to Check if A String Matches a Pattern
Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a letter …
How to Get Free HTTPS Certificates via acme.sh?
Let’s Encrypt provides HTTPS Certificates if you are already using CloudFlare which also manages/issues the free SSL certificates for you. However, with Let’s Encrypt, it is not so simple/trivial …
Algorithm to Replace All ?’s to Avoid Consecutive Repeating Characters
Given a string s containing only lower case English letters and the ‘?’ character, convert all the ‘?’ characters into lower case letters such that the final string does …
How Does C++ STL min_element, max_element, minmax_element work for Duplicate Items?
The C++ STL min_element, max_element and minmax_element (C++ 11) are useful functions from header algorithms to get the min, max, and min-and-max iterator from a given range of iterators. …