Am 09.11.2013 14:27 schrieb Joshua Landau:
`select` is quite an odd statement, in that in most cases it's just a
weaker variant of `if`. By the time you're at the point where a
`select` is actually more readable you're also at the point where a
different control flow is probably a better idea. Things like
dictionaries or a variables pointing to functions are really useful
and can be encapsulated in a class quite well. This is a bit more
advanced but largely more rigorous.
class Switch(object):
def __init__(self, value):
self.value = value
self.called = False
def case(self, other):
def wr(func):
if not self.called and self.value == other:
self.called = True
return func(self.value)
return wr
def default(self, func):
if not self.called:
self.called = True
return func(self.value)
if __name__ == '__main__':
import random
while 1:
n = random.randrange(0, 5)
sw = Switch (n)
@sw.case(1)
def _(n): print n, "is one"
@sw.case(2)
def _(n): print n, "is two"
@sw.default
def _(n): print n, "is something else"
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