-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Am 04.09.2011 19:08, schrieb Justin Kramer: > On Sunday, September 4, 2011 12:21:23 PM UTC-4, HamsterofDeath > wrote: > > * in the last loop where i am just printing out what i want to do, > i need something like "foldLeft" (from scala). how do i fold in > clojure? > > doseq is the way to iterate over a collection and perform side > effects: > > (let [moves [[0 0 p1] [1 0 p1] [2 0 p1]]] (doseq [[x y player] > moves]
nice shortcut > (println "player" player "makes move at" x "/" y))) > > reduce performs a left fold in Clojure. > > * is there no predefined "updated" function? > > Not for sequential data structures. It exists for associative > structures like maps and vectors: > > (assoc [:x :x :x] 1 :o) => [:x :o :x] > > Some other comments: > > - Nested defns are not good. why? imo, nested function/method definitions are a tool to fine-tune accessibility. just like public/private, but much more powerful. why shouldn't i use that? why make everything flat and confuse the next guy who's trying to figure out which def is supposed to be used by him and which is a helper function? You generally only want defs at the > top-level. To create lexically-scoped helper functions within > other functions, use let or letfn. > > - Development (and debugging) how to debug at all? using my ide debugger only shows "thing" i can hardly apply to the code i wrote. is usually easier when your program > consists of small, testable functions. Your winner function is a > bit hard to decipher. Consider factoring out functions that check > for runs of a value across rows/columns. again, why? the functions belong there, and nowhere else. they do not make sense outside the winner-function. they use parameters which are in scope there. factoring them out would actually make them more complex since i would have to add more parameters to their signatures. > > - I recommend reading up on Clojure's basic data structures (list, > vector, hash-map, set) and get familiar with how to build and > manipulate them: > > http://clojure.org/data_structures > http://blip.tv/clojure/clojure-data-structures-part-1-714056 > http://java.ociweb.com/mark/clojure/article.html > http://4clojure.com/problems > thx > Justin > > -- 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 - -- -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJOY8YrAAoJENRtux+h35aG+BEP/0IxG0pkx1Wu8IGR9Ku4HS8J k4Ey+wVCRv+kf1eWo7nBHG3u5ny+WCdJmyWqG12AZw+7kTZGrE5jJKICvuY3ZyhH VQb/DZzsnftJ8gEw8MzgnaLE3co7+QaCHYOqQP7g650z8AJboJh02SufGR1vk7VI n7xaYraL25VykZ11Z321tqxJb1axjtIJMJT+hozHzcTUbmilXfj9qq6wr/9xmizK lzDOkot2fxuqd5cPUs7WashCCy4lQQJlRr7mqTG87IZ2MV4lBjfvGQcFzT1Ue1gD xA9OyCuDagdkpWwgyAfGblUTZM4L5eUzCgoo+ujfWu/oAsATX3tsKPBcAnJRr50v lEqUjoCszK8iRSz35cRDOwKApVhXA/NVy05s16T7gnOVljItL9fthkJ4wsW3Wyf8 4jPXz7zFe/3sXDHJZe4EUkXvkzZRuJOSKk0s52ADIg/liApOHDwTSWt1ggnpjdfF hn1iXmWftiVp2wFLgQLDdHZJeBt9Ok2ZsXolfueIEZnFPPreHB+UISiKYaMZ4GxK MWypoqazyLp+FhFLyDzrMOynhxJsemLErEaJdgnF6hZJZmO91OgbAx6P7ZqmYDZe e2IH/qEpkXCIxjU6YdNDHdTYGFCPOdKd7HAwiKtgO9Y5ubdjjoaksnKytSQqchjV iA45lFtv8WaRCV+drlF0 =DoGC -----END PGP SIGNATURE----- -- 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
