First clear solution for Xs and Os Referee by DanielDou - python coding challenges

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First solution in Clear category for Xs and Os Referee by DanielDou

# From Daniel Dou with love...

def checkio(board):
    # First we put everything together into a single string
    x = "".join(board)
    
    # Next we outline the 8 possible winning combinations. 
    combos = ["012", "345", "678", "036", "147", "258", "048", "246"]
    
    # We go through all the winning combos 1 by 1 to see if there are any
    # all Xs or all Os in the combos
    for i in combos:
        if x[int(i[0])] == x[int(i[1])] == x[int(i[2])] and x[int(i[0])] in "XO":
            return x[int(i[0])]
    return "D"

Feb. 24, 2014

Comments:

shshlomy on May 9, 2014, 12:04 p.m.
very nice solution i will use: <pre class='brush: python'>if x[int(i[0])] == x[int(i[1])] == x[int(i[2])]!="." </pre> instead

Snake2k on May 11, 2014, 4:18 a.m.
Nice solution!

medreda on May 19, 2014, 2:18 p.m.
i think it is the best and the shortest solution

bartschuijt on June 3, 2014, 9:24 a.m.
Very clear and straightforward, thanks!

qler89 on June 4, 2014, 9:06 a.m.
This is a very good approach to solving a problem. Thank you

bjornumali on June 16, 2014, 3:39 p.m.
Very nice solution. Well done!

ArchTauruS on June 21, 2014, 12:13 p.m.
good idea :)

raunaq on July 7, 2014, 8:21 p.m.
Thanks a lot for sharing a great solution!

masero on Aug. 8, 2014, 8:53 p.m.
very clear, thanks

luizrocha13 on Sept. 2, 2014, 6:57 p.m.
Very nice

xtofl on Sept. 6, 2014, 8:12 p.m.
Quite clear and very pragmatic, to say the least. Using a string representation for the combos makes your code very (human) readable. I wonder, is it possible to reduce line 12-13 to something more readable <pre class='brush: python'>for a, b, c in combos: if x[a] == x[b] == x[c] and x[a] in "XO": </pre> This becomes possible when you change line 8 into <pre class='brush: python'>combos = { (int(c) for c in combo) for combo in "012 345 678...".split() } </pre>

eugenewongcf on Sept. 29, 2014, 4:31 p.m.
Short and straightforward solution.

XmH on Oct. 8, 2014, 10:56 a.m.
Nice and clean, love it.

e.roboda on Dec. 27, 2014, 8:06 p.m.
Cool!

grutte_pier on Feb. 25, 2015, 1:20 p.m.
Why not type the possible winning combinations as integers directly? <pre class='brush: python'>combos = [[0, 1, 2], [3, 4, 5], [6, 7, 8], ...] </pre>

mlb00 on March 26, 2015, 3:17 p.m.
16 additional characters vs 15 he used his way?

grutte_pier on March 26, 2015, 8:30 p.m.
I wouldn't mind some extra chars to simplify line 13 a bit. But that's a matter of taste. Btw: what makes you say 'he'? Daniel can be a girl name in many countries... :P

rmankai on March 8, 2015, 5:45 p.m.
It's very readable and still efficient! Nice approach of the problem, by outlining all possible winning combinations.