2.5 Higher-order Functions
You must complete this assignment by yourself.
You must submit this in an archive named "hof.zip".
You must submit this in a file named "hof.ss".
Develop the following functions and datatypes in the Intermediate Student language.
Rewrite check-range1, check-range, convert, average-price, convertFC, and eliminate-exp from the Lists and Trees assignment using map, filter, foldl, or foldr.
| (compose-func after before) → (alpha . -> . gamma) |
| after : (beta . -> . gamma) |
| before : (alpha . -> . beta) |
Returns the composition of before and after.
Produces a list of all the numbers in the elements of lolon.
Don’t use foldr.
For example, (flatten (list (list 1 2) (list 3 4 5) (list 6))) returns (list 1 2 3 4 5 6).
Produces a list of all the numbers in the elements of lolon.
Use foldr.
Returns a list of sublists of adjacent equal numbers.
Use foldr.
For example, (bucket (list 1 1 2 2 2 3 1 1 1 2 3 3)) returns (list (list 1 1) (list 2 2 2) (list 3) (list 1 1 1) (list 2) (list 3 3)).
| (tree-map f tree) → (or/c unknown? person?) |
| f : (string? . -> . string?) |
| tree : (or/c unknown? person?) |
Returns a tree where f has been applied to every person’s name in tree.
Returns a tree where lname has been appended to every person’s name in tree.
You should use tree-map and string-append.