Looking for help with a Stack Overflow error
I'm pretty new to Clojure so I'm trying out simple examples to see if I can get myself in the functional programming/Lisp mindset. My team lead sends out puzzles from his Mensa calendar, and every once in a while I find one that seems fun to solve as a Clojure program. With this particular puzzle, I've tried a couple of different ways of "solving" the puzzle, and I decided to try a recursive function. I'm fairly certain that what I've done here is not anywhere near ideal, and I'm looking for insight into how to better write this solution. Also, with my latest attempt I seem to be getting a stack overflow error, and I'm not quite sure why. I'm pretty sure it has to do with the permutation sequence (it's basically 10 factorial, or around 3 million sequences), but I don't really know how to better represent this problem in Clojure. Can anyone help? Thanks! https://github.com/bradkurtz/clojure-puzzles/tree/master/billiards -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Looking for help with a Stack Overflow error
I have since fixed the original stack overflow error I was getting, it was a result of not using "recur". However, I'm still trying to find the best way to actually iterate through the permutations to find the result... On Friday, May 16, 2014 2:31:26 PM UTC-5, Brad Kurtz wrote: > > I'm pretty new to Clojure so I'm trying out simple examples to see if I > can get myself in the functional programming/Lisp mindset. My team lead > sends out puzzles from his Mensa calendar, and every once in a while I find > one that seems fun to solve as a Clojure program. > > With this particular puzzle, I've tried a couple of different ways of > "solving" the puzzle, and I decided to try a recursive function. I'm fairly > certain that what I've done here is not anywhere near ideal, and I'm > looking for insight into how to better write this solution. > > Also, with my latest attempt I seem to be getting a stack overflow error, > and I'm not quite sure why. I'm pretty sure it has to do with the > permutation sequence (it's basically 10 factorial, or around 3 million > sequences), but I don't really know how to better represent this problem in > Clojure. Can anyone help? Thanks! > > https://github.com/bradkurtz/clojure-puzzles/tree/master/billiards > -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Looking for help with a Stack Overflow error
I've seen David Nolen talk a bit about core.logic and I admit it seems interesting. Since I'm new to Clojure I didn't think to look into it. I'll take a look at your solution Leif. Thanks for the suggestions everyone. On Sunday, May 18, 2014 6:28:15 PM UTC-5, Leif wrote: > > Hi, Brad (and Karsten). > > I solved the problem with core.logic, to try out its CLP(FD) features. It > took about 220-230ms to find a solution. It took about 400ms to find all > solutions. > > Here it is for you to peek at after you try it: > https://gist.github.com/leifp/b4af5f4cd7289c38b55a > > The code looked very similar to the problem statement, no careful > hand-crafting required. The one minor irritation is that there is no way > to easily specify equations involving vectors of logic vars. I think I > could've done it in this case with macros, but I wouldn't want to do that > if I had hundreds or thousands of variables. Maybe I'm just not > experienced enough with core.logic, experts chime in if so. > > --Leif > > On Friday, May 16, 2014 3:31:26 PM UTC-4, Brad Kurtz wrote: >> >> I'm pretty new to Clojure so I'm trying out simple examples to see if I >> can get myself in the functional programming/Lisp mindset. My team lead >> sends out puzzles from his Mensa calendar, and every once in a while I find >> one that seems fun to solve as a Clojure program. >> >> With this particular puzzle, I've tried a couple of different ways of >> "solving" the puzzle, and I decided to try a recursive function. I'm fairly >> certain that what I've done here is not anywhere near ideal, and I'm >> looking for insight into how to better write this solution. >> >> Also, with my latest attempt I seem to be getting a stack overflow error, >> and I'm not quite sure why. I'm pretty sure it has to do with the >> permutation sequence (it's basically 10 factorial, or around 3 million >> sequences), but I don't really know how to better represent this problem in >> Clojure. Can anyone help? Thanks! >> >> https://github.com/bradkurtz/clojure-puzzles/tree/master/billiards >> > -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Count vowels in a string
I saw a rant online about interviewing developers that mentioned candidates not being able to count the number of vowels in a string. So naturally, I decided to see if I could do it in Clojure! I wanted to see others' opinions on other ways of doing it. *https://gist.github.com/bradkurtz/6ce500d0361ccdc08c8e* -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Count vowels in a string
I like the one-liner. That was the kind of feedback I was looking for,
thanks.
On Tuesday, May 20, 2014 6:13:48 PM UTC-5, puzzler wrote:
>
> You're seriously overthinking this if it's any more than a one-liner.
>
> (defn count-vowels [s] (count (filter #{\a \e \i \o \u \A \E \I \O \U}
> (seq s
>
>
> On Tue, May 20, 2014 at 4:03 PM, Brad Kurtz
> > wrote:
>
>> I saw a rant online about interviewing developers that mentioned
>> candidates not being able to count the number of vowels in a string. So
>> naturally, I decided to see if I could do it in Clojure!
>>
>> I wanted to see others' opinions on other ways of doing it.
>>
>> *https://gist.github.com/bradkurtz/6ce500d0361ccdc08c8e
>> <https://gist.github.com/bradkurtz/6ce500d0361ccdc08c8e>*
>>
>> --
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>
>
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Re: Count vowels in a string
keep is cool, thanks for showing me that :)
On Wednesday, May 21, 2014 2:35:50 AM UTC-5, Vesa Marttila wrote:
>
> On Wednesday, May 21, 2014 2:03:14 AM UTC+3, Brad Kurtz wrote:
>>
>> I saw a rant online about interviewing developers that mentioned
>> candidates not being able to count the number of vowels in a string. So
>> naturally, I decided to see if I could do it in Clojure!
>>
>> I wanted to see others' opinions on other ways of doing it.
>>
>> *https://gist.github.com/bradkurtz/6ce500d0361ccdc08c8e
>> <https://gist.github.com/bradkurtz/6ce500d0361ccdc08c8e>*
>>
>
> Hi,
>
> I ended up with this: https://gist.github.com/ponzao/7399c08bb3b40d349289
>
> (def vowels
> #{\a \e \i \o \u})
>
> (defn count-vowels
> [s]
>
> (count (keep vowels (.toLowerCase s
>
> Vesa
>
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