I would use (map :keyword) myself, for that exact reason(because I'm into fail-fast), but only when I know the map is expected to never be nil at this point(but likely I'll do the program in such a way that this point won't be reached with a nil map in the first place), so that if it happens that the map is nil it will throw exception at this point and it will stop the bug propagating further, but if I were to use (:keyword map) it may err later or never. Sure I could use other ways to test for nil, but just in case I forget to do so, (map :keyword) would save me where (:keyword map) would just continue. I note that it's idiomatic clojure to use the latter variant (ie. non-fail-fast).
- says the guy(me) that hasn't done any program(in clojure anyway) On Tue, Jan 29, 2013 at 3:09 AM, James Xu <xumingming64398...@gmail.com>wrote: > (:Keyword map) is preferred, because keyword itself can never be nil, > while it's possible for map, you might be interested to have a look at: > https://github.com/bbatsov/clojure-style-guide > > From: Jonathon McKitrick <jmckitr...@gmail.com> > Reply-To: <clojure@googlegroups.com> > Date: Mon, 28 Jan 2013 18:00:01 -0800 (PST) > To: <clojure@googlegroups.com> > Subject: Best practice - (:keyword map) versus (map :keyword) > > Either one works, is there any kind of guideline on which to prefer, when? > Or is it entirely personal preference? It seems each way could be more > readable in different circumstances.... > > -- > -- > 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/groups/opt_out. > > > > -- > -- > 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/groups/opt_out. > > > -- Please correct me if I'm wrong or incomplete, even if you think I'll subconsciously hate it. -- -- 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/groups/opt_out.
