Pascal's triangle: Difference between revisions
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===Functional=== |
===Functional=== |
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The itertools module yields a simple functional definition of '''scanl''' in terms of '''accumulate''' and ''' |
The itertools module yields a simple functional definition of '''scanl''' in terms of '''accumulate''', and '''zipWith''' can be defined in terms either of '''itertools.starmap''', or the base '''map'''. |
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With a scanl and a zipWith to hand, we can derive both finite and non-finite lists of pascal rows from a |
With a scanl and a zipWith to hand, we can derive both finite and non-finite lists of pascal rows from a simple '''nextPascal''' step function: |
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{{Works with|Python|3.7}} |
{{Works with|Python|3.7}} |
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