dereference

I'm learning how to use Qt with PyQt, and I have a QTabelView with a StandardItemModel I've populated the model successfully and hooked up the itemChanged signal to a slot. I'd l'd like to mess around with whatever object is returned in IPython, so currently I have the line: def itemChangedSlot(epw, item): new_data = item.data() print new_data print item which prints <PyQt4.QtGui.QStandardItem object at 0x07C5F930> <PyQt4.QtCore.QVariant object at 0x07D331F0> In the IPython session is it possible to get the object using this memory address? I'm not seeing anything on Google, maybe I don't have

I have a simple smart pointer implementation shown in code snippet 1 below. And a dummy test class named Dummy in the 2nd snippet. The code snippet 3 shows how we can utilize this simple smart pointer to access the function foo(). My question is about the way we invoke the function foo() in class Dummy by using the -> operator. -> operator already returns a pointer to the raw pointer. So, I think, in order for us to be able to invoke function foo(), we need to perform a second -> operation on the returned raw pointer. However, many resources say that a single use of the -> operator is

HASH(0x991f0dc) so the above hash reference is stored as string in scalar variable,if we dereference it with "%" in the Perl program it throws error, Can't use string ("HASH(0x991f0dc) ") as a HASH ref while "strict refs" in use at tcpclient1.pl line 49, <GEN0> line 1 this above is throws from Perl program,i request solution,to convert back the hash string reference to Perl hash reference. You can't convert this back . The HASH(0x991f0dc) is not a hash reference. It is the string representation of a variable that contains a reference to a hash at that address. The error message you describe

From what I understand (and please correct me if I'm wrong): int x, count = 10; int *hello; hello = &count; x = *hello; Here the variables x and count are declared to be of type integer. Additionally, the variable count is assigned the value of 10. hello is a pointer to type integer. hello is then assigned the address of count. In order to access the value of count, hello must have an asterisk in front of it, ie, *hello. So, x is assigned the value of whatever is in count and in this case, 10. However... Fraction *myFraction = [[Fraction alloc] init]; [myFraction someMethod]; Here, if I

I would like to understand how pointers work, so i created this small program. first of all i create a p pointer, which points to a char. The first question is at this point. If i create a pointer, the value of it is a memoryaddress (if i point it to a non-pointer object), but this time it is "haha" in my example. Why does it work this way in char*? And how i can add value to it with cin >> p? My second question is that, i created a q char, which has the value of the *p pointer at the point i created it. BUT its value and address are "h" too, but why? It must be the memory address of this char