Re: [Boost-users] using bind with find_if

Subject: Re: [Boost-users] using bind with find_if
From: Dennis Jones (djones_at_[hidden])
Date: 2011-03-09 16:09:34

----- Original Message ----- 
From: "Igor R" <boost.lists_at_[hidden]>
To: <boost-users_at_[hidden]>
Sent: Wednesday, March 09, 2011 12:30 PM
Subject: Re: [Boost-users] using bind with find_if

>> I am currently using find_if with bind2nd to perform a search on a 
>> vector.
>> My current code looks like this:
>>
>>
>> struct OverrideMatches : public std::binary_function<const TItemOverride,
>> const TItemOverride, bool>
>> {
>> bool operator()( const TItemOverride& OverrideSource, TItemOverride
>> OverrideTarget ) const
>> {
>> return OverrideSource.ChildAssyItemRecNo ==
>> OverrideTarget.ChildAssyItemRecNo &&
>> OverrideSource.LinkItemRecNo == OverrideTarget.LinkItemRecNo;
>> }
>> };
>>
>> TItemOverrideGateway::Container_t::iterator where =
>> std::find_if( FOverridesContainer.begin(),
>> FOverridesContainer.end(),
>> std::bind2nd( OverrideMatches(),
>> TItemOverride( "", 0, "", 0, ChildItemRecNo,
>> LinkItemRecNo ) ) );
>
>
> Excuse my ignorance, but if you just want to find elements equal to
> some specific element, why don't you use simply std::find() -- without
> binds etc.?

I don't want to find elements equal to a specific element.  I want to find 
an element that meets specific criteria -- that is, find the element for 
which two of its data members have specific values.  If I already had all 
the criteria for the element, I wouldn't need to find it in the first place!

- Dennis