Create a function filter-prefix that consumes los a (listof Str)and prfx, a Str
and produces a new (listof Str) with all words that begin with prfx removed.
This question should be approached in a case insensitive manner, meaning that “PrEfIx” should
be treated the same as “prefix.” You should create a helper function to ensure the correct
answer. You are not allowed to use the built-in string-downcase or string-upcase or
string-ci=? for this question. You may use built-in list functions, however, including
string->list.
Example:
(filter-prefix (cons “apple” (cons “b” (cons “banana” (cons “BAnana”
(cons “bAnAna” (cons “BaCkWaRdS” (cons “definite” empty))))))) “bA”)
=>
(cons “apple” (cons “b” (cons “definite” empty)))
CS115 Assignment 5 Fall 2018
Due: October 24 at 10:00 a.m. (No Late Submissions)
(filter-prefix (cons “apple” (cons “b” empty)) “”) => (cons “apple”
(cons “b” empty))