#lang racket
(require sicp)
(require "../../shared/chapter1.rkt")

(define (square-list items)
  (if (null? items)
    (list)
    (cons (square (car items)) (square-list (cdr items)))))

(square-list (list 1 2 3 4))

(define (square-list items)
  (map square items))

(square-list (list 1 2 3 4))