A simple collection of array functions with associated mocha-chai unit tests.
- Pop - remove and return element from last array index
- Push - add element to end of array and return new array length
- Shift - remove and return element from the first array index
- Unshift - add element to front of array and return new array length
- Unique - returns a copy of an array with no duplicate entries
- Frequency2 - takes an array of words and returns the most common letter