On 3/25/2012 16:11, Chris Angelico wrote:
On Mon, Mar 26, 2012 at 12:48 AM, Tim Chase
<python.l...@tim.thechases.com> wrote:
Yeah, it has the same structure internally, but I'm somewhat surprised that
the DB connection object doesn't have an __iter__() that does something like
this automatically under the covers.
Sure. That's definitely the truly Pythonic technique. If I build a C++
object that acts like an array, it's going to overload the []
dereference operator - and if I build a Python object that returns a
series of things, it's going to be an iterable.
STL's containers are *heavily* based on iterators. There are forward
iterators, bidirectional iterators and even random access iterators.
You can also write (in C++11)
int my_array[5] = {1, 2, 3, 4, 5};
for (int &x : my_array)
x *= 2;
It works with every container or object which returns iterators through
begin() and end().
Note the ampersand which means "get the reference of".
Kiuhnm
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