how to use boost to bind to an attribute?
Hi, I have code like this which sort a Rect, which compare value of getY(), like this: vector<Rect*> rl; ::sort(rl.begin(), rl.end(), bind(less < int >(), bind(&Rect::getY, _1), bind(&Rect::getY, _2))); how can I change it so that it compares with the 'y' attribute? like, rect1.y < rect2.y? Thank you.
Meryl Silverburgh wrote:
Hi,
I have code like this which sort a Rect, which compare value of getY(), like this:
vector<Rect*> rl;
::sort(rl.begin(), rl.end(), bind(less < int >(), bind(&Rect::getY, _1), bind(&Rect::getY, _2)));
how can I change it so that it compares with the 'y' attribute? like, rect1.y < rect2.y?
Thank you. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Hi Meryl, well, just replace &Rect::getY with &Rect::y :) sort( rl.begin(), rl.end(), bind( less<int>(), bind(&Rect::y, _1), bind(&Rect::y, _2) ) ); -- HTH dave
David, Thank you. On 2/9/07, David Klein <dave_chp@gmx.de> wrote:
Meryl Silverburgh wrote:
Hi,
I have code like this which sort a Rect, which compare value of getY(), like this:
vector<Rect*> rl;
::sort(rl.begin(), rl.end(), bind(less < int >(), bind(&Rect::getY, _1), bind(&Rect::getY, _2)));
how can I change it so that it compares with the 'y' attribute? like, rect1.y < rect2.y?
Thank you. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Hi Meryl,
well, just replace &Rect::getY with &Rect::y :)
sort( rl.begin(), rl.end(), bind( less<int>(), bind(&Rect::y, _1), bind(&Rect::y, _2) ) );
-- HTH dave
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
On 2/9/07, Meryl Silverburgh <silverburgh.meryl@gmail.com> wrote:
how can I change it so that it compares with the 'y' attribute? like, rect1.y < rect2.y?
As of Boost 1.33: sort(rl.begin(), rl.end(), bind(&Rect::y, _1) < bind(&Rect::y, _2) ); http://boost.org/libs/bind/bind.html#operators ~ Scott McMurray
me22 wrote:
On 2/9/07, Meryl Silverburgh <silverburgh.meryl@gmail.com> wrote:
how can I change it so that it compares with the 'y' attribute? like, rect1.y < rect2.y?
As of Boost 1.33: sort(rl.begin(), rl.end(), bind(&Rect::y, _1) < bind(&Rect::y, _2) );
http://boost.org/libs/bind/bind.html#operators
~ Scott McMurray _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Oh, very cool. Thanks for the info Scott. -- Regards, dave
participants (3)
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David Klein -
me22 -
Meryl Silverburgh