Language: C C++ D Haskell Lua OCaml PHP Perl Plain Text Python Ruby Scheme Tcl ; remove member from list ; test? - comparison function ; example from the little schemer: (define rember-f (lambda (test?) (lambda (a l) (cond ((null? l) (quote())) ((test? (car l) a) (cdr l)) (else (cons (car l) ((rember-f test?) a (cdr l)))))))) ; my attempt, lisp: (defun rember-f (testp) (function (lambda (a l) (cond ((null l) nil) ((testp (car l) a) (cdr l)) (t (cons (car l) (funcall (rember-f testp) a (cdr l)))))))) ;Compiler warnings : ; In an anonymous lambda form inside REMBER-F: Undefined function REMBER-F ; In an anonymous lambda form inside REMBER-F: Undefined function TESTP (funcall (rember-f (function eq)) '1 '(1 2 3)) > Error: Undefined function TESTP called with arguments (1 1) . > While executing: (:INTERNAL REMBER-F), in process listener(1). Private [?] Run code