2
只有空洞的項目我試着使用此頁面上的代碼讓用戶輸入功能:A simple Racket terminal interaction爲什麼這個名單在球拍
(define entry_list (for/list ([line (in-lines)]
#:break (string=? line "done"))
(println line)))
(println entry_list)
輸出是:
this
"this "
is
"is "
a
"a "
test
"test"
for testing only
"for testing only"
done
'(#<void> #<void> #<void> #<void> #<void>)
爲什麼名單包括只「無效」項目?