Python
Currying decorator
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import inspect
def curried(f):
def curhelp(n, args):
if n==0:
return f(*args)
else:
return lambda arg: curhelp(n-1, args+[arg])
return curhelp(len(inspect.getargspec(f)[0]), [])
example use ##
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@curried
def add(a,b):
return a + b
map(add(10), range(3))
import inspect
def curried(f):
def curhelp(n, args):
if n==0:
return f(*args)
else:
return lambda arg: curhelp(n-1, args+[arg])
return curhelp(len(inspect.getargspec(f)[0]), [])
## example use ##
@curried
def add(a,b):
return a + b
map(add(10), range(3)) # == [10,11,12]
Refactorings
No refactoring yet !
brent
March 5, 2008,
March 05, 2008 18:31,
permalink
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def add(a, b):
return a + b
add10 = add.__get__(10)
print map(add10, range(3))
This decorator works, but uses recursion and re-allocates the args list after each application of the curried function. Can you get rid of one or both?
I googled a bit, but all the example code I found is for partial application instead of true currying.