def reverse_apply(self):
"""Creates a Function that reversely apply positional arguments.
Reversed positional arguments application:
>>> minus = Function(lambda a, b: a - b)
>>> minus(8, 5)
3
>>> subtract = minus.reverse_apply()
>>> subtract(8, 5)
-3
``flip`` is a read-only property for easier referencing:
>>> minus.flip(8, 5)
-3
>>> minus.flip.flip(8, 5)
3
Flip operator ``~``
>>> (~minus)(8, 5)
-3
>>> subtract = ~minus
>>> subtract(8, 5)
-3
"""
return self.clone(flip(self.invoke))
def reverse_apply(self):
"""Creates a Function that reversely apply positional arguments.
Reversed positional arguments application:
>>> minus = Function(lambda a, b: a - b)
>>> minus(8, 5)
3
>>> subtract = minus.reverse_apply()
>>> subtract(8, 5)
-3
``flip`` is a read-only property for easier referencing:
>>> minus.flip(8, 5)
-3
>>> minus.flip.flip(8, 5)
3
Flip operator ``~``
>>> (~minus)(8, 5)
-3
>>> subtract = ~minus
>>> subtract(8, 5)
-3
"""
return self.clone(flip(self.invoke))
def test_flip():
f = lambda a, b: a - b
ns = [(2, 1), (1, 2), (0, 1), (1, 0)]
for a, b in ns:
assert f(a, b) != flip(f)(a, b)
assert flip(f)(a, b) == flip(f)(a, b)
assert flip(f)(a, b) != flip(flip(f))(a, b)
assert flip(flip(f))(a, b) == f(a, b)