Sort Function

[SteM]

Hi!!

I need something like a "sortfunction" because i want to sort the files
in a directory x by name or date. i can't find any system function in
c++ - any ideas, examples??

Thx,
SteM

[Tim Love]

St**@wic.co.at writes:

Hi!! I need something like a "sortfunction" because i want to sort the files
in a directory x by name or date. i can't find any system function in
c++ - any ideas, examples??

I don't really know what you mean when you say 'something like a
"sortfunction"' or 'i can't find any system function in c++'.

How have you tried to look? Try Google and search for
C++ sort
.. But you'll still need to do some work to get info about files.

[Matthias Käppler]

St**@wic.co.at wrote:

Hi!!

I need something like a "sortfunction" because i want to sort the files
in a directory x by name or date. i can't find any system function in
c++ - any ideas, examples??

Thx,
SteM

std::list has a sort operation:

void sort ()
Sort the elements.
template<typename StrictWeakOrdering> void sort (StrictWeakOrdering)
Sort the elements according to comparison function.

In addition to that, check out <algorithm>.
I guess there's lots of sorting algos implemented in there.

Regards,
Matthias

[Jonathan Mcdougall]

> I need something like a "sortfunction" because i want to sort the files

in a directory x by name or date. i can't find any system function in
c++ - any ideas, examples??

Hmm.. what about std::sort?

# include <algorithm>

class File
{
};
void by_name(std::vector<File> &files)
{
std::sort(files.begin(), files.end());
}
bool date_compare(const File &f1, const File &f2)
{
if ( f1.date() < f2.date() )
return true;

return false;
}

void by_date(std::vector<File> &files)
{
std::sort(files.begin(), files.end(), date_compare);
}
Jonathan

[Howard]

"Jonathan Mcdougall" <jo***************@DELyahoo.ca> wrote in message
news:2d*********************@wagner.videotron.net. ..

bool date_compare(const File &f1, const File &f2)
{
if ( f1.date() < f2.date() )
return true;

return false;
}

How about just:

return (f1.date() < f2.date());

?

-Howard

[Jonathan Mcdougall]

>>bool date_compare(const File &f1, const File &f2)

{
if ( f1.date() < f2.date() )
return true;

return false;
}

How about just:

return (f1.date() < f2.date());

Thanks for the constructive answer.
Jonathan