On 2008-01-17, Steven D'Aprano <[EMAIL PROTECTED]> wrote:
> On Thu, 17 Jan 2008 11:40:59 +0800, J. Peng wrote:
>
>> May I ask, python's pass-by-reference is passing the object's reference
>> to functions, but perl, or C's pass-by-reference is passing the variable
>> itself's reference to functions.
On Jan 17, 1:59 am, Christian Heimes <[EMAIL PROTECTED]> wrote:
> George Sakkis wrote:
> > Posting a counter-example where the difference is clearly shown would
> > be more vastly useful than referring to a list of long obscure usenet
> > posts with practically no examples. C/C++ are not even menti
On Jan 17, 2008 2:55 PM, Hrvoje Niksic <[EMAIL PROTECTED]> wrote:
>
> @$ref = (4, 5, 6) intentionally assigns to the same list pointed to by
> the reference. That would be spelled as x[:] = [4, 5, 6] in Python.
> What Python does in your example is assign the same as Perl's $ref =
> [4, 5, 6]. So
"J. Peng" <[EMAIL PROTECTED]> writes:
> $ cat t1.py
> def test(x):
> x = [4,5,6]
>
> a=[1,2,3]
> test(a)
> print a
>
> $ python t1.py
> [1, 2, 3]
>
> $ cat t1.pl
> sub test {
> my $ref = shift;
> @$ref = (4,5,6);
> }
@$ref = (4, 5, 6) intentionally assigns to the same list pointed to
George Sakkis wrote:
> Posting a counter-example where the difference is clearly shown would
> be more vastly useful than referring to a list of long obscure usenet
> posts with practically no examples. C/C++ are not even mentioned in
> that page. I am not claiming you are wrong, I just don't find
On Jan 17, 1:03 am, Christian Heimes <[EMAIL PROTECTED]> wrote:
> George Sakkis wrote:
> > Python's parameter passing is like passing a pointer in C/C++.
>
> [snip]
>
> It's not (I repeat NOT) like passing a pointer in C. Please
> readhttp://effbot.org/zone/call-by-object.htm
>
> Christian
Posti
On Jan 17, 3:34 am, "J. Peng" <[EMAIL PROTECTED]> wrote:
> I just thought python's way of assigning value to a variable is really
> different to other language like C,perl. :)
>
> Below two ways (python and perl) are called "pass by reference", but
> they get different results.
> Yes I'm reading 'C
On Jan 17, 2008 1:54 PM, Mel <[EMAIL PROTECTED]> wrote:
>
> test(a) (along with def test(x)) takes the object named 'a' in the
> current namespace and binds it with the name 'x' in function test's
> local namespace. So, inside test, the name 'x' starts by referring to
>the list that contains [
On Jan 17, 2008 2:03 PM, Christian Heimes <[EMAIL PROTECTED]> wrote:
> George Sakkis wrote:
> > Python's parameter passing is like passing a pointer in C/C++.
> [snip]
>
> It's not (I repeat NOT) like passing a pointer in C. Please read
> http://effbot.org/zone/call-by-object.htm
>
Yes I agree. No
George Sakkis wrote:
> Python's parameter passing is like passing a pointer in C/C++.
[snip]
It's not (I repeat NOT) like passing a pointer in C. Please read
http://effbot.org/zone/call-by-object.htm
Christian
--
http://mail.python.org/mailman/listinfo/python-list
J. Peng wrote:
> May I ask, python's pass-by-reference is passing the object's
> reference to functions, but perl, or C's pass-by-reference is passing
> the variable itself's reference to functions. So althought they're all
> called pass-by-reference,but will get different results.Is it?
>
> On Ja
On Jan 16, 10:34 pm, "J. Peng" <[EMAIL PROTECTED]> wrote:
> I just thought python's way of assigning value to a variable is really
> different to other language like C,perl. :)
>
> Below two ways (python and perl) are called "pass by reference", but
> they get different results.
>
> (snipped)
Pyt
On Thu, 17 Jan 2008 11:40:59 +0800, J. Peng wrote:
> May I ask, python's pass-by-reference is passing the object's reference
> to functions, but perl, or C's pass-by-reference is passing the variable
> itself's reference to functions. So althought they're all called
> pass-by-reference,but will ge
May I ask, python's pass-by-reference is passing the object's
reference to functions, but perl, or C's pass-by-reference is passing
the variable itself's reference to functions. So althought they're all
called pass-by-reference,but will get different results.Is it?
On Jan 17, 2008 11:34 AM, J. Pen
I just thought python's way of assigning value to a variable is really
different to other language like C,perl. :)
Below two ways (python and perl) are called "pass by reference", but
they get different results.
Yes I'm reading 'Core python programming', I know what happened, but
just a little con
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