The "ns" form is a macro that takes a special syntax and always uses the keyword form, as you have in your first example. Your second example is incorrect; I'd be surprised if it even ran.
The reason for this is to make it clear that you're not executing the require function directly, but instead passing options to the ns form. - James On 3 July 2014 18:11, gvim <gvi...@gmail.com> wrote: > I'm reading "Cloujure in Action" as an introduction to Clojure and, > although, I understand a keyword can be used as a function I don't > understand the difference between: > > (ns org.currylogic.damages.http.expenses > (:require [clojure.data.json :as json-lib] > [clojure.xml :as xml-core])) > > ... and > > (ns org.currylogic.damages.http.expenses > (require [clojure.data.json :as json-lib] > [clojure.xml :as xml-core])) > > > When is it idiomatic or even preferable to substitute a function with a > keyword equivalent? > > > gvim > > -- > 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 > --- You received this message because you are subscribed to the Google > Groups "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
