Lisp/Scheme中的'(撇号)是什么? [英] What is ' (apostrophe) in Lisp / Scheme?
问题描述
我正处于第1天的第1天自学计划.不用说，我什么都不懂.因此，我正在阅读小计划者并使用此东西:
I am on day 1 hour 1 of teaching myself Scheme. Needless to say, I don't understand anything. So I'm reading The Little Schemer and using this thing:
作为口译员.
例如，我需要使用'
(atom? 'turkey)
以避免出现未定义的变量"错误.根据这本书，'是Common Lisp的东西.
to avoid an "undefined variable" error. The ', according to the book, is a Common Lisp thing.
我有两个问题:
-
我上面提到的口译员很好吗?你能推荐另一个吗?我需要一个可以与 The Little Schemer 完美搭配的产品.
Is the interpreter I mentioned above a good one? Can you recommend another? I need one that will go well with The Little Schemer.
什么是'?
推荐答案
表格'foo只是键入特殊表格的一种更快的方法
The form 'foo is simply a faster way to type the special form
(quote foo)
这就是说，不要评估名称foo并将其替换为它的值；我的意思是名称foo".
which is to say, "do not evaluate the name foo and replace it with its value; I really mean the name foo".
我认为SISC非常适合探索TLS中的练习.
I think SISC is perfectly fine for exploring the exercises in TLS.
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