Re: [Boost-users] Question about using Boost::for_each function toset a local variable if a condition is met

From: Meryl Silverburgh (silverburgh.meryl_at_[hidden])
Date: 2007-01-31 00:19:31

On 1/30/07, Peter Dimov <pdimov_at_[hidden]> wrote:
> Gottlob Frege wrote:
> > On 1/30/07, Meryl Silverburgh <silverburgh.meryl_at_[hidden]> wrote:
> >> Hi,
> >>
> >> I am trying to Boost::for_each function to set a local variable if
> >> all elements in this is DEFAULT type.
> >>
> >> Here is my code, but I don't know how to implement the last part of
> >> the if_then call.
> >>
> >>  boolean rtnValue = false;
> >>
> >
> > bool rtnValue = true;  // assume true
> >
> >>  for_each(mylist.begin(), mylist.end(), if_then(
> >> bind(&ListItem::getType, _1) == DEFAULT,  set the local value to true
> >> if true if all of them are DEFAULT type ));
> >>
> > bind(&ListItem::getType, _1) != DEFAULT, set the local value to
> > false));
>
> bool rtnValue = find_if( mylist.begin(), mylist.end(),
>     bind(&ListItem::getType, _1) != DEFAULT ) == mylist.end();
>
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Thanks for the help.