Re: can't see the error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Am 27.09.2011 06:27, schrieb Baishampayan Ghose: i wasn't really trying to achieve anything useful - just messing around and see where i get. now i'm here: (defrecord point [x y z]) (defn genPoints [n] (let [random (new Random) randomInt #(.nextInt random) randomPoint #(new point (randomInt) (randomInt) (randomInt))] (repeatedly n randomPoint))) is there a way to avoid writing (randomInt)(randomInt)(randomInt) and instead something like (magic (repeatedly 3 randomInt))? This is how I would write it - (defrecord Point [x y z]) ;;; Only needed in pre Clojure 1.3.0 ;;; In Clojure 1.3.0, -Point will be generated automatically ;; (defn -Point ;; [x y z] ;; (Point. x y z)) (defn gen-points [n] (let [random (java.util.Random.) random-int #(.nextInt random) random-point #(apply -Point (repeatedly 3 random-int))] (repeatedly n random-point))) Hope this helps. Regards, BG yes it does :) - -- -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.14 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJOght3AAoJENRtux+h35aG+AIP/j3ufGpS74wSSDv1RyAJjx2V S7cdRuF4U00tanW1OAn/PYY93iT0wcXBgKowuo/jD9+C0TV5K7/he33KeSRrJCnb vLEq8B1Um4JOc1V7MZZBaqtIfJcaQ3s5fcPtPdITX97dX79A3WSItU3/Fc+UYC2i eF7p99dNLToF2KQhQPZ0Wb37gyIit/XExWiuTx8FIkNzLsL/cPQFMJpcG5Thw9pF 6EKImZOH2A6zOgO68nbynxV4D2vOW7VKkJb7B61XgRILf9bfLqspg/GmEeXaBTrp gNXSbE7AFAHp6bA08nvydfr9H68z1H53i79mLxlDVXsq3MjGiHVddDa1SaG9SwwV Vt7K0IndKqFonoI5WUj9CRnxWDoDhy35zwSolJOZhAjSSBHDdZCa9fa0BUU5HXu6 15z3RTG9nOk6OIQJeJiKNGaHtPdplJ0ugHFCDhLpsQZoG8z6QWT6n6BxDwRU9w3i bEobBms8PqEsTWf1MmwJxLPyA/UC0wVKNiMdqheyydVZ/siGJzXN6fgJYFFUXPhT KElmSJPeV6Ee56GG2ttDFSSblP+At2Kv3zJZQqUnbEhiu6a3L6ofrybTkaUjASWK KXcnTYEy/ARi2lc+lD39pgM9YKJOOvgX9f3cGFe8mi4B1nZ5nlzrciyN3eJy8QaL /MJvl1yQRxdWqQX1xLsQ =vR6l -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
Re: can't see the error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 i don't have the magic eye to spot the parenthesis-errors yet Am 25.09.2011 22:15, schrieb Mark Rathwell: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) extra parenthesis in three places, and the first argument to iterate is a function, not a long: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] (map print (iterate nextInt 0))) On Sun, Sep 25, 2011 at 3:51 PM, Dennis Haupt d.haup...@googlemail.com wrote: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) the error is: java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn (NO_SOURCE_FILE:0) why does it want to cast my 0 to a function? and how can i get rid of the dummy parameter [a]? -- 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/ iQIcBAEBAgAGBQJOgLayAAoJENRtux+h35aG5UgQAJMV850ntNNio3g2HCcaVj4E LH4KfnIhC0otFrEQQfHg3ha+mBuo9flt55NnHGMfEBNdxCTkfpm0SDzqt6QTKBRA aGDDJuTyAbmnSvGnOkk60RRqeVS1QOErRyjzrMugNxguNQ5ZUKmZ5GeTndLHn0w0 g81CRfF0CSLD8j9ng98iJOdn/VwyijeATQo2b/DQhkyKHyFzlyGT3LXrRgWYAI5o NbCzMC1K/0o9LPyP9TGBvOoRrKQ28WzMsJGWhV0bWNmsMzeZokE99UDSUvYpRM+f OpyL/4MCkW6f1imGWzLpSBMHZqLSwkXX7U2fNrMGj1zi4knir/D3LF+aw5XLmkms oS6IO5qnttQ1IHCsdC9nflYfk891CNEwgGS9jG7RPJ75Zls6VzYL6zT8V/RN1xr3 3s2fYVH2elIM1SVXphTRsY5bqw7xNa0Jti8ual9j5+t+HiQ8qyqX6Yxf6KQZ+9Ux EkfpjjFw2Fh4JpJ9dYK1sOncho9j18TLE6afUuTLPYqPlhV5b0AcpPJ3XEA0ayef U2Plapgp4Jxk6IMGAoMyD/fyaRkiOKIQw+TucWc4F2icX10LjVbM2eacyKLwvwPo gmgGHfNyRj4dHOmRv40x9JheRiqJdXtuoWEks9wSY3D6sUS3qWNplCwfpJMWhIhT Dc/HVQYRIunjZ+cGALHQ =It6H -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
Re: can't see the error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 i wasn't really trying to achieve anything useful - just messing around and see where i get. now i'm here: (defrecord point [x y z]) (defn genPoints [n] (let [random (new Random) randomInt #(.nextInt random) randomPoint #(new point (randomInt) (randomInt) (randomInt))] (repeatedly n randomPoint))) is there a way to avoid writing (randomInt)(randomInt)(randomInt) and instead something like (magic (repeatedly 3 randomInt))? Am 25.09.2011 22:14, schrieb Baishampayan Ghose: On Mon, Sep 26, 2011 at 1:21 AM, Dennis Haupt d.haup...@googlemail.com wrote: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) the error is: java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn (NO_SOURCE_FILE:0) why does it want to cast my 0 to a function? and how can i get rid of the dummy parameter [a]? You have too many parentheses in your code. The error is coming because of the ``((nextInt dummy) 0)'' line where you are trying to call an integer (the result of calling nextInt on dummy) as a function. I don't know what exactly you are trying to achieve here, but assuming that you want n consecutive pseudo-random integers, I would write it like this - (let [rnd (java.util.Random.) next-int #(.nextInt rnd)] (repeatedly 10 next-int)) ; substitute 10 with desired number Regards, BG - -- -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.14 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJOgO+8AAoJENRtux+h35aGF2kP/3MGVpxqqkax5O0kmX/Kh9u5 b48b6YrlgPwbSvTra2aqs+4rLF4U8mUUN82XyacB+PFAc6PeE3I8/aJudUvFO0RP c8qL31NKPSm8RTvhPWzBejh2pyu1cP4qZtmgrSFfSan34n/oadfi0w8c1AjHsQqr MVMMo2gY/U4J68wG2I7bNdbx3VT1OtmZlY04UBh5D9F6NXJ11+hEZLS89K32F6up hi0EoruOxgeJnWDMLdTsKCUiSzlI8m6ZSlRVu8aj/xkdfcDXQhNVLp/UEmKhX355 wdkZm7VHHKop1c057vlXO8Fz6eUZ2E1RV3jf2osieg3Exj5s4cHncUES5cxZ14NF 6b0Avqxf69yX5ids2OOTaTqWrniRVqhf2KyDZGmgJfgwDyfLxMeephp/3glfYrbf L3CIsXmjwebtFkwDm9LJvO8DXsOY+NU2ZgwfGCRqbwNxQU+0TMsGGgIypvD2rnM1 zAQE9kmcKLALLOwFcu6hN/OntpjtOk5e51hA7V/1oAk8H0BWOEKW1aYMggwoySgG ti9BPg8MqyTBtZmqFUyOPFH3EQr8sEjRXpu2Wf1RxATShfNWwalqeOHbEhV/vJkO SunWpUn/eqKaTzAq+ZI9VrWteMrmklHDlo7PhEwkp6JVFxUj3psfkQeqdY9fSRjz Ei2jqCQXBMRO2CGEC/+R =bKcz -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
Re: can't see the error
This: randomPoint #(apply new point (repeatedly 3 randomInt)) does not work, but is almost what you want. It doesn't work because new is a macro, and apply only works with functions as the first arg. Using the following two lines, first to define a function, then to use it with apply, seems like it ought to work. Not sure whether it is magic enough for you, though :-) newpt #(new point %1 %2 %3) randomPoint #(apply newpt (repeatedly 3 randomInt)) Andy On Mon, Sep 26, 2011 at 3:49 PM, Jeremy Heiler jeremyhei...@gmail.comwrote: On Mon, Sep 26, 2011 at 5:33 PM, Dennis Haupt d.haup...@googlemail.com wrote: now i'm here: (defrecord point [x y z]) (defn genPoints [n] (let [random (new Random) randomInt #(.nextInt random) randomPoint #(new point (randomInt) (randomInt) (randomInt))] (repeatedly n randomPoint))) is there a way to avoid writing (randomInt)(randomInt)(randomInt) and instead something like (magic (repeatedly 3 randomInt))? I'm not sure if this the best way, but it would work. (eval `(new point ~@(take 3 (repeatedly #(rand-int 10) -- 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: can't see the error
i wasn't really trying to achieve anything useful - just messing around and see where i get. now i'm here: (defrecord point [x y z]) (defn genPoints [n] (let [random (new Random) randomInt #(.nextInt random) randomPoint #(new point (randomInt) (randomInt) (randomInt))] (repeatedly n randomPoint))) is there a way to avoid writing (randomInt)(randomInt)(randomInt) and instead something like (magic (repeatedly 3 randomInt))? This is how I would write it - (defrecord Point [x y z]) ;;; Only needed in pre Clojure 1.3.0 ;;; In Clojure 1.3.0, -Point will be generated automatically ;; (defn -Point ;; [x y z] ;; (Point. x y z)) (defn gen-points [n] (let [random (java.util.Random.) random-int #(.nextInt random) random-point #(apply -Point (repeatedly 3 random-int))] (repeatedly n random-point))) Hope this helps. Regards, BG -- 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 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: can't see the error
On Sun Sep 25 21:51 2011, Dennis Haupt wrote: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) the error is: java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn (NO_SOURCE_FILE:0) why does it want to cast my 0 to a function? and how can i get rid of the dummy parameter [a]? I don't think it's trying to cast your zero to a function. Instead, here's what I think is going on: In this expression: ((nextInt dummy) 0) The inner expression gets evaluated to some integer. The end result is: (some int 0) And that is where an integer is trying to be invoked as a function. Ultimately, I am not sure that 'iterate' is really the function you want. If you want an infinite lazy sequence of random integers, you probably want something more like 'repeatedly': (let [rand (java.util.Random.) nextInt #(.nextInt rand)] (map print (repeatedly nextInt))) Note that this sequence, being infinite, will not terminate. If you only want to print the first five random numbers, you can do something like: (let [rand (java.util.Random.) nextInt #(.nextInt rand)] (map print (take 5 (repeatedly nextInt I hope this helps. Sincerely, Daniel Solano Gómez signature.asc Description: Digital signature
Re: can't see the error
On Mon, Sep 26, 2011 at 1:21 AM, Dennis Haupt d.haup...@googlemail.com wrote: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) the error is: java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn (NO_SOURCE_FILE:0) why does it want to cast my 0 to a function? and how can i get rid of the dummy parameter [a]? You have too many parentheses in your code. The error is coming because of the ``((nextInt dummy) 0)'' line where you are trying to call an integer (the result of calling nextInt on dummy) as a function. I don't know what exactly you are trying to achieve here, but assuming that you want n consecutive pseudo-random integers, I would write it like this - (let [rnd (java.util.Random.) next-int #(.nextInt rnd)] (repeatedly 10 next-int)) ; substitute 10 with desired number Regards, BG -- 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 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: can't see the error
(let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) extra parenthesis in three places, and the first argument to iterate is a function, not a long: (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] (map print (iterate nextInt 0))) On Sun, Sep 25, 2011 at 3:51 PM, Dennis Haupt d.haup...@googlemail.com wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 (let [rand (new java.util.Random) nextInt (fn [a] (.nextInt rand))] ((map (print) (iterate ((nextInt dummy) 0) the error is: java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn (NO_SOURCE_FILE:0) why does it want to cast my 0 to a function? and how can i get rid of the dummy parameter [a]? -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.14 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJOf4ZIAAoJENRtux+h35aG19UP/1tWgqcQifwUI5zHdkKWTcY8 iY9vXGEr3IvTC2nB1yXJESJ6T/4OTpGhUT9ctX+6xGxPHFC9OPUdvnp5gGUOjCFQ Qa9G8Qc6Za1uc0HFzbWYxP9yi8TAPg1WVA3RF046kKuS/m9X8uUMtCulSJH8y6m4 VmREcGlyQNjgCDMSRmMX5Y7vVuU2e6KoV6VjSopBHzX/sXBsMd0AZcnCRokBUKre 7J1PyK3YKBmRLZ6gdvnOTz4kDBoKE7yrbh2gpIsQciqsawZ0wWYlBou7JceSxtN3 Zwzm64YLxW8f6DjaRL7ZUAwTVMBkIru86hgm2bMK5pFX5f8bzBcmx09eIgd1fgLV c3bHtFYWzVrCRAGA+7iqeedQiFmkX2aK6yIcEma8KvoPXRlU5XhTiTN4B4sfPrpC qHM0U30WVIV05qs9E8rW2JDmpm1X7RpkZ9P3PEQXgYV1yJaSjPPyxRC1R0wi7f0o KUEXu+WO0egLyh3d8kfD1GMR/ztRGlS0UbJ3htqso710uD+R4GzFvRcitF99bQtm cOgz7sLB0hJTS3AblNhRzwt0CRdsPjHfBixrqbxGbXcLvkXFyoZMebuJwMZNcpzY wFhgEGyVxShXQASNub3dzNS8peU5fgoAGLexHh46e02K8a1YWjK3OOokZ3W9uCpt ghqI1/wkly1r9F/FroFo =+5YI -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 -- 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
