Department numbers: Difference between revisions
Content added Content deleted
m (→{{header|Python}}: (defined bind in terms of operator.add)) |
|||
| Line 1,925: | Line 1,925: | ||
14: 6 5 1 </pre> |
14: 6 5 1 </pre> |
||
Or, |
Or, expressing the options directly and declaratively in terms of '''reduce''' and '''add''', without importing permutations: |
||
<lang python>from functools import (reduce) |
<lang python>from functools import (reduce) |
||
from operator import (add) |
|||
| Line 1,960: | Line 1,961: | ||
# bind (>>=) :: [a] -> (a -> [b]) -> [b] |
# bind (>>=) :: [a] -> (a -> [b]) -> [b] |
||
def bind(xs): |
def bind(xs): |
||
return lambda f: reduce( |
return lambda f: reduce(add, map(f, xs), []) |
||
lambda a, b: a + b, |
|||
map(f, xs), |
|||
[] |
|||
) |
|||