Loops/Increment loop index within loop body: Difference between revisions
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→{{header|Python}}: Added a functional draft, expressed in terms of a generic iterate function, implemented as a generator. |
→Functional Python: Pruned out a little scaffolding – two unused imports. |
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<lang python>'''Loops/Increment loop index within loop body.''' |
<lang python>'''Loops/Increment loop index within loop body.''' |
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from itertools import |
from itertools import islice, takewhile |
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from functools import reduce |
from functools import reduce |
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import operator |
import operator |
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lambda a, f: f(a), |
lambda a, f: f(a), |
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fs[::-1], x |
fs[::-1], x |
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) |
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# concatMap :: (a -> [b]) -> [a] -> [b] |
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def concatMap(f): |
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'''A concatenated list or string over which a function f |
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has been mapped. |
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The list monad can be derived by using an (a -> [b]) |
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function which wraps its output in a list (using an |
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empty list to represent computational failure). |
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''' |
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return lambda xs: ( |
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chain.from_iterable(map(f, xs)) |
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) |
) |
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