Removal Of Elements in a Vector Conatings User-Defined Object Basedon Value Contained in Object

[Adam Hartshorne]

Hi All,

I have a vector of MyObject's user defined objects(with each containing
a bool type variable called myFlag). I want to go through the whole
vector and delete from it all the MyObjects's that have their myFlag set
to false. I can't work out a simple way of doing this, any suggests
would be much appreciated,

Adam

 

[Victor Bazarov]

I have a vector of MyObject's user defined objects(with each containing a
bool type variable called myFlag). I want to go through the whole vector
and delete from it all the MyObjects's that have their myFlag set to
false. I can't work out a simple way of doing this, any suggests would be
much appreciated,

Create a custom functor

class MyFlagTester {
bool desired;
public:
MyFlagTester(bool d) : desired(d) {}
bool operator()(MyObject const& o) const
{ return o.myFlag == desired; }
};

Then use it:

myVector.erase(std::remove_if(myVector.begin(), myVector.end(),
MyFlagTester(false)));

V