I wrote a few examples up for explaining this: http://blog.jayfields.com/2010/12/clojure-get-get-in-contains-and-some.html
they might be helpful if you want additional info above and beyond the docs. Cheers, Jay On Aug 24, 2011, at 5:15 PM, Mark Rathwell wrote: > See the doc below. What (contains? [1 2] 1) is testing is whether [1 > 2] has a value at index 1 (the key value for numerically indexed > collections). It does, so it returns true. What you are probably > looking for is the Java method .contains of the vector: > > (.contains ["a" "b"] "a") > ;=> true > > (.contains [1 2 5] 5) > ;=> true > > user> (doc contains?) > ------------------------- > clojure.core/contains? > ([coll key]) > Returns true if key is present in the given collection, otherwise > returns false. Note that for numerically indexed collections like > vectors and Java arrays, this tests if the numeric key is within the > range of indexes. 'contains?' operates constant or logarithmic time; > it will not perform a linear search for a value. See also 'some'. > > > > > On Wed, Aug 24, 2011 at 4:57 PM, Andrew Xue <and...@lumoslabs.com> wrote: >> the below seems odd >> >> user=> (contains? [1 2] 1) >> true >> user=> (contains? ["a" "b"] "a") >> false >> >> am i missing something? >> >> -- >> 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 -- 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
