#checkio

[chiseld]

30 days of Python: 19/30

Long overdue, but today I finally checked out a site I’ve had bookmarked for ages: the coding “game” CheckIO. It’s basically a normal coding-challenge site, but dressed up with this cute interface that makes it feel more like a game.

I also worked through this tutorial on using packages and modules, created by Sheena from codementor.io – it was really helpful and written in a clear and comprehensible manner.

And finally, as you may have seen me squeeing about in my previous couple of posts, I finished the OOP section of that Udemy course I’ve been loving! This was a super productive day for my studyblr challenge :)

[karmakettle]

Discover if a square matrix is skew-symmetric.

Today's challenge was to see if a matrix was a "negative reflection" of itself; if matrix(i,j) was equal to -matrix(j,i). I ended up with an On^2 solution to generate the matrix coordinates and stored these in a set to prevent duplicate entries. Then I iterated over the set and returned False if coordinate (i,j) was != -(i,j).

[playistic]

Game of Code: Checkio gamifies and crowdsources the task of programming

Checkio's code learners can now compete on a worldwide basis and share what they create. http://goo.gl/ldky4I #Playistic

[hawk4-n]

checkio

TypeError: list indices must be integers, not float というエラーでハマった。 python3以降は割り算の挙動が変わるらしい。/ではなく、//とすれば整数になるようだ。

middle = (first + last) // 2 The // indicates floor division in Python 3.x.

http://stackoverflow.com/questions/13355816/typeerror-list-indices-must-be-integers-not-float