A candidate for a solution. Exercise 20.2.2. Formulate contracts for the following functions:
1. sort, which consumes a list of numbers and a function that consumes two numbers (from the list) and produces a boolean; sort produces a list of numbers. 2. map, which consumes a function from numbers to numbers and a list of numbers; it also produces a list of numbers. 3. project, which consumes a list of lists of symbols and a function from lists of symbols to symbols; it produces a list of symbols. Solution. sort: (listof number) (number number -> boolean) -> (listof number) map: (number -> number) (listof number) -> (listof number) project: (listof (listof symbol)) ((listof symbol) -> symbol) -> (listof symbol) ____________________ Racket Users list: http://lists.racket-lang.org/users
