QOTD
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Congrats to Christian Graus for thinking up the QOTD. I believe this is the first one I've seen from a CPian. Of course, I can't answer because I haven't a clue when it comes to STL. So I'll just leave the answering of it to the rest of you. :) David Stone It seemed similar to someone saying, "Would you like to meet my knife collection?" Ryan Johnston on Elaine's sig
I don't know anything about STL, what is an STL iterator? Having said that the only option that look reasonable is D (although other options are possible if iterators have overloaded operators). Ryan Johnston
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Chris Losinger wrote: but, i've honestly never seen that in any live code or example: it's always (*it).Foo(); Are you serious? I have never ever seen someone use (*it).Foo() instead of it->Foo(). Pointers would be so dirty without ->. Ryan Johnston
Ryan Johnston wrote: Are you serious? yes, 100%. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
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Ryan Johnston wrote: Are you serious? yes, 100%. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
Wow, interesting... I guess the only difference is one keystroke, but I am just surprised. What kind of programming do you do? Ryan Johnston
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Wow, interesting... I guess the only difference is one keystroke, but I am just surprised. What kind of programming do you do? Ryan Johnston
there's probably some deep metaphysical reason why people want to use (*it). instead of it-> . i just do it because that's how i learned it. Ryan Johnston wrote: What kind of programming do you do? a little of everything, but mostly 2d graphics. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
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Congrats to Christian Graus for thinking up the QOTD. I believe this is the first one I've seen from a CPian. Of course, I can't answer because I haven't a clue when it comes to STL. So I'll just leave the answering of it to the rest of you. :) David Stone It seemed similar to someone saying, "Would you like to meet my knife collection?" Ryan Johnston on Elaine's sig
The answer is C) (*it) is the value, so &(*it) is the address of the value. Or did I miss something? I vote pro drink :beer:
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Ryan Johnston wrote: Are you serious? yes, 100%. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
:omg:
David Wulff http://www.davidwulff.co.uk
One 18yrs male, red and white, good condition; daily servicing required. £500 collect ono.
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The answer is C) (*it) is the value, so &(*it) is the address of the value. Or did I miss something? I vote pro drink :beer:
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there's probably some deep metaphysical reason why people want to use (*it). instead of it-> . i just do it because that's how i learned it. Ryan Johnston wrote: What kind of programming do you do? a little of everything, but mostly 2d graphics. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
Looking into the MSDN can open eyes! iterator overloads operator*. plain and simple. Somehow the STL trys to use references wherever possible.
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:omg:
David Wulff http://www.davidwulff.co.uk
One 18yrs male, red and white, good condition; daily servicing required. £500 collect ono.
sadly, that used up the last of my "serious" for today. time for beer. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
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The answer is C) (*it) is the value, so &(*it) is the address of the value. Or did I miss something? I vote pro drink :beer:
Correct :D! Altough I believe the questioner ment D).
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sadly, that used up the last of my "serious" for today. time for beer. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
lol. :)
David Wulff http://www.davidwulff.co.uk
One 18yrs male, red and white, good condition; daily servicing required. £500 collect ono.
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Looking into the MSDN can open eyes! iterator overloads operator*. plain and simple. Somehow the STL trys to use references wherever possible.
Colin Leitner wrote: plain and simple what's plain and simple? *it.menuItem // does not compile (*it).menuItem // compiles nicely -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
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Colin Leitner wrote: plain and simple what's plain and simple? *it.menuItem // does not compile (*it).menuItem // compiles nicely -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
iterator is a struct. now operator* returns the value (if I understood that right). so you need it.operator*().menuItem or (*it).menuItem. This has nothing to do with any pointer syntax.
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iterator is a struct. now operator* returns the value (if I understood that right). so you need it.operator*().menuItem or (*it).menuItem. This has nothing to do with any pointer syntax.
but it has a lot to do with precedence. overloading an operator, such as "*" doesn't change its precedence. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
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but it has a lot to do with precedence. overloading an operator, such as "*" doesn't change its precedence. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
Yes but '->' won't work at all! You cannot change operator precedence at all, that's correct. a+++++b ;)
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The answer is C) (*it) is the value, so &(*it) is the address of the value. Or did I miss something? I vote pro drink :beer:
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Yes but '->' won't work at all! You cannot change operator precedence at all, that's correct. a+++++b ;)
are you 100% sure of that?
#include <vector>
struct sc
{
sc(int i) {v=i;}
sc() {v=0;}int v;
};
int main(int argc, char* argv[])
{std::vector <sc> myvec;
myvec.push_back(sc(10));
myvec.push_back(sc(40));
myvec.push_back(sc(60));
myvec.push_back(sc(15));
myvec.push_back(sc(13));
myvec.push_back(sc(11));for (std::vector<sc>::iterator it = myvec.begin(); it!=myvec.end(); it++)
{
if ((*it).v != it->v)
{
printf("%d != %d\n", (*it).v, it->v);
}
}
return 0;
}cause this works fine. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
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What's wrong with 'it' alone - (as long as the context indicates a valuetype * is expected)
You don't need to sleep to see a nightmare Anne Clark [sighist]
peterchen wrote: What's wrong with 'it' a You mean, aside from being incorrect code? ;) An iterator is an opaque data type, like say POSITION in MFC. You can't make any assumptions about it actually being a pointer to the underlying data, because iterator is not documented as such. --Mike-- Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer My really out-of-date homepage Sonork-100.19012 Acid_Helm
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I don't know anything about STL, what is an STL iterator? Having said that the only option that look reasonable is D (although other options are possible if iterators have overloaded operators). Ryan Johnston
It's a type used to iterate (!) through the elements in an STL collection (vector, list, etc.) --Mike-- Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer My really out-of-date homepage Sonork-100.19012 Acid_Helm
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are you 100% sure of that?
#include <vector>
struct sc
{
sc(int i) {v=i;}
sc() {v=0;}int v;
};
int main(int argc, char* argv[])
{std::vector <sc> myvec;
myvec.push_back(sc(10));
myvec.push_back(sc(40));
myvec.push_back(sc(60));
myvec.push_back(sc(15));
myvec.push_back(sc(13));
myvec.push_back(sc(11));for (std::vector<sc>::iterator it = myvec.begin(); it!=myvec.end(); it++)
{
if ((*it).v != it->v)
{
printf("%d != %d\n", (*it).v, it->v);
}
}
return 0;
}cause this works fine. -c
Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten
I'm sorry, I forgot they implemented the operator-> too (argh! operator overloading begins to suck ;)