Python Vs Ruby ( again )


#1

There was a discussion a while back in trying to get Ruby looking like
Python using an indentation scheme and I posted a possible solution to
that

http://xtargets.com/snippets/posts/show/68

There is also the Lazibi library ( sorry no link … google it ) that
does a similar thing.

I thought to be fair I’d have a hack in the opposite direction and see
if I could emulate Ruby’s block notation in Python without
preprocessing. Turns out that you can get pretty close though if a bit
ugly due to the statement vs expression nature of the language.

Note that in python a return statement from within a function with a
yield statement is illegal some some ugly workaround is necessary.

A few short examples …

from ruby import rubyfi

#Ruby’s inject method
@rubyfi
def inject(ret, iter, a = 0):
for x in iter:
a = yield a, x
ret(a)

#Ruby’s collect method
@rubyfi
def collect(ret, iter):
r = []
for x in iter:
x = yield x,
r.append(x)
ret®

Do a sum over a range

for r, s, x in inject ( range (1,6), 1 ) :
r(s+x)
print r()

Generate a list

for r, s, x in inject ( range (1,6), [] ) :
s.append(x*x)
r(s)
print r()

Collect some items

for r, x in collect ( range (1,6) ) :
r(x+x)
print r()

The library and some details is at

http://xtargets.com/snippets/posts/show/74

Can this be developed a little further or a little cleaner?