Re: problem with take-while
On 27 July 2011 00:03, axyzxp axy...@gmail.com wrote: Hi, experimenting with clojure API i had this: user= (take-while #(= (mod 20 %) 0) (apply (fn [x y] (rest (range (max x y [10 20])) (1 2) but i expect to have (1 2 5 10) because of (apply (fn [x y] (rest (range (max x y [10 20]) returns (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) and (mod 20 5) and (mod 20 10) should give me true and not should be dropped... I'm sure i'm doing some big nasty errors but don't know where... In addition to the other answers, you can use: (range 1 20) instead of: (rest (range 20)) and zero? instead of (= x 0). e.g.: (filter #(zero? (mod 20 %)) (range 1 (apply max [10 20]))) -- Michael Wood esiot...@gmail.com -- 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: problem with take-while
thanks guys, now everything is clearer to me. I really apreciate your help -- 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: problem with take-while
On Wed, Jul 27, 2011 at 1:51 PM, axyzxp axy...@gmail.com wrote: thanks guys, now everything is clearer to me. I really apreciate your help You're welcome. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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
problem with take-while
Hi, experimenting with clojure API i had this: user= (take-while #(= (mod 20 %) 0) (apply (fn [x y] (rest (range (max x y [10 20])) (1 2) but i expect to have (1 2 5 10) because of (apply (fn [x y] (rest (range (max x y [10 20]) returns (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) and (mod 20 5) and (mod 20 10) should give me true and not should be dropped... I'm sure i'm doing some big nasty errors but don't know where... -- 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: problem with take-while
user= (take-while #(= (mod 20 %) 0) (apply (fn [x y] (rest (range (max x y [10 20])) (1 2) but i expect to have (1 2 5 10) because of (apply (fn [x y] (rest (range (max x y [10 20]) returns (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) and (mod 20 5) and (mod 20 10) should give me true and not should be dropped... take-while stops returning more elements as soon as the condition is false. --Steve -- 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: problem with take-while
On Tue, Jul 26, 2011 at 8:27 PM, Stephen C. Gilardi squee...@mac.com wrote: user= (take-while #(= (mod 20 %) 0) (apply (fn [x y] (rest (range (max x y [10 20])) (1 2) but i expect to have (1 2 5 10) because of (apply (fn [x y] (rest (range (max x y [10 20]) returns (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) and (mod 20 5) and (mod 20 10) should give me true and not should be dropped... take-while stops returning more elements as soon as the condition is false. --Steve The function that does what the OP seems to want is filter. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: problem with take-while
Because take-while takes while (= (mod 20 %) 0) and (= (mod 20 3) 0) returns false. Use filter, but be careful filter will hung up with infinite sequences. -- Name: OGINO Masanori (荻野 雅紀) E-mail: masanori.og...@gmail.com -- 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: problem with take-while
filter will hung up with infinite sequences. is incorrect. Sorry. filter may hung if you request something impossible. For (silly) example, (second (filter even? (range))) returns 2. However (second (filter zero? (range))) goes in search of the second zero in natural numbers... -- Name: OGINO Masanori (荻野 雅紀) E-mail: masanori.og...@gmail.com -- 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
