Re: Alternative to (or (:k1 m) (:k2 m))
On Jul 31, 2012, at 12:00 AM, Ben Smith-Mannschott wrote: ((some-fn :k1 :k2) m) Ah, excellent. Yet another hidden gem in clojure I'd somehow overlooked until now! -- 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
Alternative to (or (:k1 m) (:k2 m))
Is there an elegant way to say '(or (:k1 m) (:k2 m)), without repeating m? Using a let can be awkward if the expression isn't already wrapped in one; '(apply #(or %1 %2) (map m [:k1 :k2])) is similarly bad. Hopefully there's something clever I'm missing; any ideas? -- 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
Re: Alternative to (or (:k1 m) (:k2 m))
(some identity ((juxt :k1 :k2) m)) is the first thing I can think of. On Tue, Jul 31, 2012 at 12:48 AM, Michael Gardner gardne...@gmail.com wrote: Is there an elegant way to say '(or (:k1 m) (:k2 m)), without repeating m? Using a let can be awkward if the expression isn't already wrapped in one; '(apply #(or %1 %2) (map m [:k1 :k2])) is similarly bad. Hopefully there's something clever I'm missing; any ideas? -- 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 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
Re: Alternative to (or (:k1 m) (:k2 m))
On Mon, Jul 30, 2012 at 6:55 PM, Moritz Ulrich ulrich.mor...@gmail.com wrote: (some identity ((juxt :k1 :k2) m)) is the first thing I can think of. For even more fun, try (some m [:k1 :k2]) :) --Aaron -- 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
Re: Alternative to (or (:k1 m) (:k2 m))
On Jul 30, 2012, at 6:08 PM, Aaron Cohen wrote: For even more fun, try (some m [:k1 :k2]) :) Wow, that's perfect. It even works with string keys! Thanks, guys. -- 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
Re: Alternative to (or (:k1 m) (:k2 m))
On Tue, Jul 31, 2012 at 1:08 AM, Aaron Cohen aa...@assonance.org wrote: On Mon, Jul 30, 2012 at 6:55 PM, Moritz Ulrich ulrich.mor...@gmail.com wrote: (some identity ((juxt :k1 :k2) m)) is the first thing I can think of. For even more fun, try (some m [:k1 :k2]) :) The flip side of this proposal is: ((some-fn :k1 :k2) m) Which takes advantage of the fact that keywords can be called as functions. That means it will only work for keyword keys, but the upshot is that it will work for arbitrary functions (not just keywords) and m need not be a map. See also every-pred, which -- 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
Re: Alternative to (or (:k1 m) (:k2 m))
On Tue, Jul 31, 2012 at 7:00 AM, Ben Smith-Mannschott bsmith.o...@gmail.com wrote: On Tue, Jul 31, 2012 at 1:08 AM, Aaron Cohen aa...@assonance.org wrote: On Mon, Jul 30, 2012 at 6:55 PM, Moritz Ulrich ulrich.mor...@gmail.com wrote: (some identity ((juxt :k1 :k2) m)) is the first thing I can think of. For even more fun, try (some m [:k1 :k2]) :) The flip side of this proposal is: ((some-fn :k1 :k2) m) Which takes advantage of the fact that keywords can be called as functions. That means it will only work for keyword keys, but the upshot is that it will work for arbitrary functions (not just keywords) and m need not be a map. See also every-pred, which ((my new truly ergonomic keyboard is taking some getting used to -- this is the second time I've mashed some keys and ended up sending a gmail message earlier than intended.)) See also every-pred, which complements some-fn. Oh, and see complement too. These three correspond to 'or', 'and' and 'not' respectively. // ben -- 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
