First clear solution for Determinant by kurosawa4434 - python coding challenges

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First solution in Clear category for Determinant by kurosawa4434

def checkio(data):

    if len(data) == 1:
        return data[0][0]

    total = 0
    for i, m in enumerate(data[0]):
        total += ((-1)**i * m * checkio([row[:i]+row[i+1:] for row in data[1:]]))
    return total

July 23, 2016

Comments:

maybe on Dec. 31, 2019, 5:05 p.m.
<p>Yes, fine and clear. the extra variable 'total' could be avoided by use of the 'sum' function. </p> <pre class='brush: python'>return sum( ... for i,m in enumerate... ) </pre> <p>this is a typical replacement of summation inside for-loops. However when the expression inside the sum() gets complex and hard to read, perhaps the for-loop is to be preferred.</p>

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