Turn strings like "House" into "H3e"
Rotate this array [[1,2,3],[4,5,6],[7,8,9]] into [[1,4,7],[2,5,8],[3,6,9]]
Display the usernames in ascending order, from this dataset: [{name: 'jone', age: 4}, {name: 'ted', age: 15}, {name: 'suzy', age: 26}, {name: 'david', age: 30}]
A simple example of showing how to use Function.call() and Array.map()