Nick Coghlan wrote:
> Python, however, uses a dynamic name binding system and scopes are expensive
> because they require setting up all of the machinery to support nested
> visibility.
Scopes within a function needn't be anywhere near as expensive
as scopes for nested functions are. The compil
Andrew Koenig wrote:
>>Interestingly enough, not all C++ compilers (Microsoft) hid variables
>>created in for loops
>>(http://www.devx.com/cplus/10MinuteSolution/28908/0/page/2).
>
>
> That's because the C++ spec changed during standardization, when the
> standards committee realized the original
> Interestingly enough, not all C++ compilers (Microsoft) hid variables
> created in for loops
> (http://www.devx.com/cplus/10MinuteSolution/28908/0/page/2).
That's because the C++ spec changed during standardization, when the
standards committee realized the original idea was a mistake.
One of t
On Thursday 2005-09-22 20:00, Josiah Carlson wrote:
[Alexander Myodov:]
> > But for the "performance-oriented/human-friendliness" factor, Python
> > is anyway not a rival to C and similar lowlevellers. C has
> > pseudo-namespaces, though.
>
> C does not have pseudo-namespaces or variable encapsul
On 9/22/05, Greg Ewing <[EMAIL PROTECTED]> wrote:
> Josiah Carlson wrote:
>
> > As for list comprehensions, they were literally meant to be a
> > completely equivalent translation of a set of for loops.
>
> I don't think that's quite true. I doubt whether anyone
> really thought about the issue whe
Josiah Carlson wrote:
> As for list comprehensions, they were literally meant to be a
> completely equivalent translation of a set of for loops.
I don't think that's quite true. I doubt whether anyone
really thought about the issue when LCs were first being
discussed. I didn't, but if I had, I wo
Please end this thread. It belongs in c.l.py. Nothing's going to change.
--
--Guido van Rossum (home page: http://www.python.org/~guido/)
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Alexander Myodov <[EMAIL PROTECTED]> wrote:
> >> "for (int i = 0; i < 10; i++)" works fine nowadays.
> JC> I'm sorry, but you are wrong. The C99 spec states that you must define
> JC> the type of i before using it in the loop. Maybe you are thinking of
> JC> C++, which allows such things.
> "gc
Hello Josiah,
>> i = 0
>> while i != 1:
>> i += 1
>> j = 5
>> print j
JC> Maybe you don't realize this, but C's while also 'leaks' internal
JC> variables...
JC> int i = 0, j;
JC> while (i != 1) {
JC> i++;
JC> j = 5;
JC> }
JC> printf("%i %i\n", i, j);
Yeah, it may *leak* it in your
Alexander Myodov <[EMAIL PROTECTED]> wrote:
[snip Alexander Myodov complaining about how Python works]
> i = 0
> while i != 1:
> i += 1
> j = 5
> print j
Maybe you don't realize this, but C's while also 'leaks' internal
variables...
int i = 0, j;
while (i != 1) {
i++;
j = 5;
}
p
"Alexander Myodov" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Why the variables defined inside "for"/"while"/"if" statements
> (including loop variables for "for") are visible outside this scope?
Questions about why Python is the way it is belong on comp.lang.python, the
gene
Alexander Myodov wrote:
> Thus, your example falls to case 1: "i" variable is newly declared for
> this loop. Well, we don't reuse old value of i to start the iteration
> from a particular place, like below?
>
> i = 5
> for i in [3,4,5,6,7]:
> print i,
>
> More general, the variables could b
Hello Josiah,
>> Why the variables defined inside "for"/"while"/"if" statements
>> (including loop variables for "for") are visible outside this scope?
JC> if and while statements don't define variables, so they can't expose
JC> them later in the scope.
They don't. They just leak internal ones:
Alexander Myodov <[EMAIL PROTECTED]> wrote:
> Hello,
>
> Don't want to be importunate annoyingly asking the things probably
> trivial for experienced community, but need to ask it anyway, after
> spending about two hours trying to find well-camouflaged error caused
> by it.
In the future yo
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