hi,
I haven't used Python... but last days I read some stuff, wanted to compare
both languages for myself and found something interesting.
They are proposing extentinon to Pyhon 2 (with their so called PEP
documents, this also is good idea i.e. using current or some modified
version of RFC's for features addition in Perl 7,8,9,10.... ;") )
Can this be done easly at the moment OR via some of the new proposals ?!!!?
Does this have some benefit compared to array creation via cycles .... !!!
<snip>
List Comprehensions
This is a flexible new notation for lists whose elements are computed from
another list (or lists). The simplest form is:
[<expression> for <variable> in <sequence>]
For example, [i**2 for i in range(4)] yields the list [0, 1, 4, 9]. This is
more efficient than a for loop with a list.append() call.
You can also add a condition:
[<expression> for <variable> in <sequence> if <condition>]
For example, [w for w in words if w == w.lower()] would yield the list of
words that contain no uppercase characters. This is more efficient than a
for loop with an if statement and a list.append() call.
You can also have nested for loops and more than one 'if' clause. For
example, here's a function that flattens a sequence of sequences::
def flatten(seq):
return [x for subseq in seq for x in subseq]
flatten([[0], [1,2,3], [4,5], [6,7,8,9], []])
This prints
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
</snip>
thanx
=====
iVAN
[EMAIL PROTECTED]
=====
