Implement map, filter, reduce and reduce right

Use the Take function as reference on how it should be implemented

** * Exercise 2 map, filter, take, reduce */ function map (func: (v: T) => V, seq: LazySequence ): LazySequence { return IMPLEMENT_THIS; } function filter ( func: (v: T) => boolean, seq: LazySequence ): LazySequence { } return IMPLEMENT_THIS;