Hi, On Aug 4, 9:32 am, limux <liumengji...@gmail.com> wrote:
> i very confused var-quote, hope someone explain it more detailed than > the clojure.org's, thks. Global values are stored in so-called Vars. Symbols are used in program code to link to those Vars, ie. to basically give them a name. So the addition function is stored in a Var named +. So whenever the compiler sees the symbol + it looks up the Var + refers to and gets its value, the actual addition function. Now, if you actually want to access the Var itself, not the function it holds, you need to somehow tell the compiler this intent. And this is exactly what #' does. When you write #'+ in your code, you tell the compiler: "Look. I want the Var named +, not its contents." This is useful to extract metadata about the value in the function, like docstrings, argument lists, type hints, etc. Hope this helps. Sincerely Meikel -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
