Thanks everyone for the help. The nil behavior of the 'or' version breaks what I wanted, but I may create functions that return just true or false though the odd edge case where "and" will return a value will mean I'll have to handle that. My preference would be to throw an exception but thats another cultural question about the language. What is prefered - throwing the last value or failing when not given correct input?
Ok now on to implementation. Thanks! On Wednesday, May 22, 2013 7:38:17 AM UTC-5, Michał Marczyk wrote: > > On 22 May 2013 08:09, Baishampayan Ghose <b.g...@gmail.com <javascript:>> > wrote: > > Using a lambda seems to be a sane approach - > > > > (reduce #(and %1 %2) '(false false true)) > > ;=> false > > Note that this will always traverse the entire input collection, > whereas every? stops at the first false value. > > Same thing goes for reducing with #(or %1 %2) vs. using some. > > Cheers, > Michał > > > > > On Wed, May 22, 2013 at 5:36 AM, Peter Mancini > > <pe...@cicayda.com<javascript:>> > wrote: > >> OK long time lurker here. I've been growing in my Clojure strength for > a > >> while now. For the most part I think I get it and I have no problem > getting > >> programs to do what I want. However, sometimes I get stumped. > >> > >> I have one function that produces a list of booleans like '(false false > >> true). It seemed to me that this should be legal: > >> > >> (reduce and '(false false true)) > >> > >> However that is not legal with the complaint being something about > "and" > >> being a macro. :-/ > >> > >> I did get it to work with: > >> > >> (eval (conj '(false false true) 'and)) > >> > >> It works but is it "correct"? Is it what you would do? I noticed that > '(nil > >> nil true) will cause "and" to produce false, so I am aware of that edge > >> case. Anything else I should be aware of? > >> > >> Thanks. > >> > >> -- > >> -- > >> You received this message because you are subscribed to the Google > >> Groups "Clojure" group. > >> To post to this group, send email to clo...@googlegroups.com<javascript:> > >> Note that posts from new members are moderated - please be patient with > your > >> first post. > >> To unsubscribe from this group, send email to > >> clojure+u...@googlegroups.com <javascript:> > >> 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+u...@googlegroups.com <javascript:>. > >> For more options, visit https://groups.google.com/groups/opt_out. > >> > >> > > > > > > > > -- > > Baishampayan Ghose > > b.ghose at gmail.com > > > > -- > > -- > > You received this message because you are subscribed to the Google > > Groups "Clojure" group. > > To post to this group, send email to clo...@googlegroups.com<javascript:> > > Note that posts from new members are moderated - please be patient with > your first post. > > To unsubscribe from this group, send email to > > clojure+u...@googlegroups.com <javascript:> > > 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+u...@googlegroups.com <javascript:>. > > 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.
