def test_max_by():
def square(n):
return n * n
assert_equal(min_by(square, -3, 2), 2)
assert_equal(reduce(min_by(square), 0, [3, -5, 4, 1, -2]), 0)
assert_equal(reduce(min_by(square), 0, []), 0)
def max_by_test():
def square(n):
return n * n
assert_equal(max_by(square, -3, 2), -3)
assert_equal(reduce(max_by(square), 0, [3, -5, 4, 1, -2]), -5)
assert_equal(reduce(max_by(square), 0, []), 0)
def any_pass(ps, v):
"""Takes a list of predicates and returns a predicate that returns true for a
given list of arguments if at least one of the provided predicates is
satisfied by those arguments.
The function returned is a curried function whose arity matches that of the
highest-arity predicate"""
return reduce(either, always(False), ps)(v)
def any_pass(ps, v):
return reduce(either, always(False), ps)(v)
def all_pass(ps, v):
return reduce(both, always(True), ps)(v)
from ramda.curry import curry from ramda.reduce import reduce from .multiply import multiply product = reduce(multiply, 1)
