将字符串转换为字符串序列

时间:2017-02-24 05:29:46

标签: string list split scheme lisp

我创造了一些将单词转换成它们的对应物的明胶翻译器。

按照以下步骤,

(translate '("ark" "gold"))

给出

"arkway golday"

但是我想简单地输入(翻译" ark gold")并获得" arkway golday"

我想我会使用string-split和string-join但是我似乎在添加错误:

(define (piglatin phrase)
    (string-split translate phrase))

并且跑步(piglatin'(" ark gold"))

给我错误:

string-split: contract violation
  expected: (or/c string? regexp?)
  given: '("ark gold")

代码:

#lang racket

(define (piglatin phrase)
    (string-split translate phrase))

(define (translate sentence)
  (string-join (map breakSentence sentence)))

; break down sentance string split into a list
(define (breakSentence word)
  (list->string (listWord (string->list word))))

; break down word for vowel testing
(define (listWord word)
  (cond
    ((foundVowel (car word))
     (startsVowel word))
    (else(noVowel word '()))))

; letters that are vowels, their prensence indicates way should be added to end
(define (foundVowel letter)
  (member letter '(#\a #\e #\i #\o #\u #\y)))

; allow adding way to end of word
(define (startsVowel word)
  (append word '(#\w #\a #\y)))

1 个答案:

答案 0 :(得分:0)

在翻译之前,您需要将字符串拆分为单词。

(define (piglatin phrase)
  (translate (string-split  phrase)))