在History of Lisp ，麦卡锡写道:
The unexpected appearance of an interpreter tended to freeze the form of the language, and some of the decisions made rather lightheartedly for the ``Recursive functions ...'' paper later proved unfortunate. These included the COND notation for conditional expressions which leads to an unnecessary depth of parentheses, and the use of the number zero to denote the empty list NIL and the truth value false. Besides encouraging pornographic programming, giving a special interpretation to the address 0 has caused difficulties in all subsequent implementations.
他在说什么？
最佳答案
... zero to denote the empty list ...
因为 0==() 自 1958 年以来一直是色情的表情符号。
现在你知道了。
关于lisp - John McCarthy 所说的*色情节目*是什么意思？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8547142/