Ooh, aah, just a little bit... creative solution for The Angles of a Triangle by veky - python coding challenges

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Ooh, aah, just a little bit... solution in Creative category for The Angles of a Triangle by veky

def checkio(*sides):
    from math import degrees, acos
    angle = lambda x,y,z: round(degrees(acos((x*x+y*y-z*z)/2/x/y+1e-9)))
    a, b, c = sorted(sides)
    try: return angle(b, c, a), angle(c, a, b), angle(a, b, c)
    except ValueError: return 0, 0, 0

April 4, 2015

Comments:

Parzifal on Jan. 25, 2019, 10:24 a.m.
This is nearly exactly what i intended to do, only that for you it worked (thanks to the little trick), nice. I used def instead of lambda and hid the try there, although thinking about it, it seems more logical to have it in main... Also, return 0,0,0 does not work for me. It needs to be a list. Strange.

veky on Jan. 25, 2019, 11:06 a.m.
<ol> <li>Yes, floats are full of surprises. :-] But adding 1e-9 helps in a nontrivial number of cases. :-D</li> <li>The point when evaluating one try vs. three of them is: whether they can fail individually, or they must fail at the same time. I think it's quite obvious that you cannot have one zero and two nonzero entries in the final answer. :-)</li> <li>CheckiO's obsession with lists is quite another, long and boring story. :-]</li> </ol>

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