Often we solve a coding challenge or come across an answer on Stack Overflow, we learn the solution but it doesn't always stick. This is to remember those solutions better and to serve as a point of reference for when you come across a common task in everyday coding and know that you have solved it before - Not to be used as a way to cheat on Codewars. Repetition is how we learn
- Return the element that occurs odd number of times
- Test if all array elements are integers
- Add each array element with every other element in the array
- Compare two arrays for matches