string 方案中的换行符（球拍）
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原文地址: http://stackoverflow.com/questions/15423969/
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Newline in Scheme (Racket)
提问by Asqan
It is possible to have a new line when you write with "display" like
当您使用“显示”编写时，可能会有一个新行，例如
(display "exa \n mple")
But the problem is that there is no any code to have a new line in strings? Like:
但问题是没有任何代码可以在字符串中换行吗？喜欢：
"exa \n mple"
Expected ->
预期 ->
exa
mple
What I have:
我拥有的：
exa \n mple
I couldn't find any information in racket-documentation or anywhere else.
我在球拍文档或其他任何地方都找不到任何信息。
回答by rafcolm_
Something like:
就像是：
(display "line\nhola")
should do it.
应该这样做。
No idea why you would need whatever was posted above.
不知道为什么您需要上面发布的任何内容。
回答by óscar López
If you need a way to add a newline between strings, then this will work:
如果您需要一种在字符串之间添加换行符的方法，那么这将起作用：
(define s (string-append "exa " "\n" " mple"))
s
=> "exa \n mple"
(display s)
=> exa
mple
In the above snippet, I'm using string-appendfor sticking together two strings with a newline in the middle. The resulting string swill have a newline in-between when you use it, for example by displaying it.
在上面的代码段中，我string-append用于将两个字符串粘在一起，中间有一个换行符。s当您使用它时，生成的字符串中间会有一个换行符，例如通过显示它。
Obviously it will show up as "exa \n mple", you can't expect the string to jump from one line to the other unlessyou display it, print it, show it, write it, etc.
显然它会显示为"exa \n mple"，你不能指望字符串从一行跳到另一行，除非你显示它，打印它，显示它，写它等等。
