Perfect numbers: Difference between revisions
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(→{{header|Python}}: replaced reduce(add) with sum) |
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Functional style: |
Functional style: |
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<lang python>perf = lambda n: n == sum(i for i in xrange(1, n) if n % i == 0)</lang> |
<lang python>perf = lambda n: n == sum(i for i in xrange(1, n) if n % i == 0)</lang> |
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Or, a little faster (by restricting the search space): |
Or, a little faster (by restricting the search space): |
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# GENERIC |
# GENERIC -------------------------------- |
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# concatMap::(a - > [b]) - > [a] - > [b] |
# concatMap::(a - > [b]) - > [a] - > [b] |
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