First speedy solution for Skew-symmetric Matrix by hanpari - python coding challenges

Enable Javascript in your browser and then refresh this page, for a much enhanced experience.

First solution in Speedy category for Skew-symmetric Matrix by hanpari

def checkio(m):
    return all([not (m[i][j] + m[j][i]) for
                     i in range(len(m)) for
                     j in range(len(m))])


#These "asserts" using only for self-checking and not necessary for auto-testing

May 4, 2014

Comments:

veky on Nov. 29, 2014, 3:29 p.m.
Here you use superfluous []: all([...]) instead of all(...). ;-P And, independently: doesn't not any(...) seem better than all(not ...)? Of course, none(...) would be best, but too many builtins are probably wrong idea. :-]

hanpari on Nov. 29, 2014, 5:10 p.m.
You are right. Thank you for comment. This is my old solution from time when I use list comprehension everywhere because it was rather black magic. So I cannot defend myself - quilty in all charge. I am learning Python since I have started with checkio. I hope there is some progress visible, though :)

veky on Nov. 29, 2014, 8:41 p.m.
I surely see progress, but of course I'm subjective. ;-D

hanpari on Nov. 29, 2014, 9:05 p.m.
Oh my, thank you. I had really nostalgic feeling today. I clearly remember how I downvoted year ago one of your solution which used comprehension because it seems to me too difficult to be in Clear category. But dont worry. Even today most of your solutions are mysterious to me :)

veky on Nov. 30, 2014, 5:21 a.m.
That "nostalgic feeling" is why I insist categories are missing the point. Since you like it very much when I throw some link, here is an interesting perspective from Yegge, the man who makes obvious seem profound:-) : <a href="http://steve-yegge.blogspot.com/2008/02/portrait-of-n00b.html">http://steve-yegge.blogspot.com/2008/02/portrait-of-n00b.html</a> <blockquote> But dont worry. Even today most of your solutions are mysterious to me :) </blockquote> There will come a day when they won't be. ;-) (Of course you know, but for the others: it is not my goal to have people stupefied by my code permanently. In fact it is completely the opposite. By having them temporariliy stupefied, I induce the learning reflex. See my essay on "I love Python" for more details.;)

hanpari on Nov. 30, 2014, 8:34 p.m.
I have learnt a lot from you anyway. Thanks for link. My opinion differs from yours because as person involved in industry I know that clever solution are often confusing those ones who have another job to do and have no time to think hard about. So I am trying to keep my solution as clear as possible. I can expect that people who knows more than me are able to come with better approach. But on the other hand, newbies can appreciate it :)

veky on Nov. 30, 2014, 9:40 p.m.
Of course. There's place for everyone in CheckiO. It would be incredibly boring if we all wrote in the same style. But in production, it would obviously be useless to have hundreds of implementations of the same function. I'm in "industry" too. You might find it hard to believe, but I don't code like this on my day job. :-) But we talked about this already. I just view CiO as a release valve, you probably view it as extension of your regular capitalistic existence. :-]

hanpari on Dec. 1, 2014, 7:17 a.m.
by industry I mean plastic processing. I am not programmer :)

veky on Dec. 1, 2014, 2:56 p.m.
Ah... sorry for misunderstanding. So CiO is a release valve for you too, only in a whole different way. :-)

hanpari on Aug. 13, 2015, 6:50 p.m.
Hi Veky, I see you can appreciate my post 9 months after. Well, the hidden and deep truth was finally revealed, apparantly :) How are you? I am not active on Checkio so you were probably pretty bored I guess :) Rest assured if there were some private messaging or I had your email I would send you message long ago because I was missing you. :) Are you still bullying newbies with your splendid knowledge or the time has come and you became as modest as possible? By the way, what about Fsharp and Mr. Wlaschin? Are you reading those pages. I am still finding them really fascinating.

veky on Aug. 13, 2015, 7:46 p.m.
<blockquote> Well, the hidden and deep truth was finally revealed, apparantly :) </blockquote> You can think of it that way, if you want. :-P <blockquote> How are you? I am not active on Checkio so you were probably pretty bored I guess :) </blockquote> Don't think yourself too special - there are always new admirers. ;-] <blockquote> Rest assured if there were some private messaging or I had your email I would send you message long ago because I was missing you. :) </blockquote> Many people from CiO have found my email. It's not so hard, but it does act as a light filter. ;-] <blockquote> Are you still bullying newbies with your splendid knowledge or the time has come and you became as modest as possible? </blockquote> I am as modest as possible, and that is not at all. :-P But I strongly oppose your characterization of my behaviour as bullying. We've talked about that. <blockquote> By the way, what about Fsharp and Mr. Wlaschin? Are you reading those pages. I am still finding them really fascinating. </blockquote> I read most of it, and concluded there's nothing new there. Microsoft is, as always, too late to the game.

hanpari on Aug. 13, 2015, 8:26 p.m.
<blockquote> I read most of it, and concluded there’s nothing new there. Microsoft is, as always, too late to the game. </blockquote> Fascinating things are not that new as you might think with your shallow mindset :) Actually I agree with you (hm, it is damned hot here) Fsharp is interesting but too late. The Wlaschins articles are good not because of Fsharp but because of authors insight. <blockquote> Don’t think yourself too special - there are always new admirers. ;-] </blockquote> What an arrogant sentence! Children of these days! Any anonymous reader might be confused. So be warned, my friend, there is only one person I truly admire... my wise myself. :) You know that feeling, right? :) Actually, I am not so into programming anymore. It was interesting year in my life though (thanks to you, of course). But that time is over. I have just dropped by to say hello to newbies' nightmares, my old friend Veky :) who is really special (see, I know how to make compliment). Just sit down, open new bottle of vodka (as I did) and read with tears in your eyes my lines full of deep wisdom :)

veky on Aug. 13, 2015, 8:32 p.m.
If shallow mindset is the only way to get you to agree with me, so be it. ;-] <blockquote> So be warned, my friend, there is only one person I truly admire… my wise myself. :) </blockquote> You haven't convinced even yourself. Try harder. ;-P <hr /> Enjoy your vodka, and maybe we'll cross paths in some other human endeavor. ;-)

Ice Base

0 %

You ClassRoom Demo is Ready With the new tool CheckiO ClassRoom, you will be able to analyze your students' progress, have your own leaderboard, change missions order on the map, and so on.