One of the ways that Emacs Lisp differs from other Lisps is that it doesn’t support multiple arguments for comparisons. That is, you can’t write things like <\/p>\n
(if<\/span> (= a b c) do-this else-do-that)\n<\/pre>\n<\/p><\/div>\n or <\/p>\n
\n(when<\/span> (< a b c) ...)\n<\/pre>\n<\/p><\/div>\n You can still express those comparisons, of course, but you have to connect two or more two-argument comparisons with and<\/code>. <\/p>\n Now, as Bozhidar Batsov points out, that’s about to change. Emacs 24.4 will support variadic comparisons<\/a>. That’s not a huge change but it does bring Elisp in line with other Lisps and makes it easier to express complex comparisons concisely and clearly. As I wrote before<\/a>, I’m really impressed with this release and looking forward to its availability. <\/p>\n","protected":false},"excerpt":{"rendered":"One of the ways that Emacs Lisp differs from other Lisps is that it doesn’t support multiple arguments for comparisons. That is, you can’t write things like (if (= a b c) do-this else-do-that) or (when (< a b c) … Continue reading