如何在emacs lisp中计算两个集合之间的差异，集合应该是列表 [英] How to calculate difference between two sets in emacs lisp,the sets should be lists

问题描述

如何计算Emacs Lisp中两组之间的差异?集合应该是列表. 该程序应该非常简单且简短，否则我将无法理解.我是新手.

How to calculate the difference between two sets in Emacs Lisp? The sets should be lists. The programm should be very simple and short, or else I won't understand it. I'm a newbee.

Thx

推荐答案

Common Lisp扩展中有一个set-difference函数:

There is a set-difference function in the Common Lisp extensions:

elisp> (require 'cl)
cl
elisp> (set-difference '(1 2 3) '(2 3 4))
(1)

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