Any way to bind an object with an integer

[Jayden Shui]

Hello All,

I think usually we require to bind an object with a data, such as an
integer. From this object, we can easily and quickly get its bound
integer. std::map requires the object to be compared. Any other way to
do it?

Thank you very much for your kind help!

Best regards,

Jayden

 

[Victor Bazarov]

I think usually we require to bind an object with a data, such as an
integer. From this object, we can easily and quickly get its bound
integer. std::map requires the object to be compared. Any other way to
do it?

A derived class that adds an integer as a data member? You disclose too
little of the requirements to recommend anything specific...

V

 

[SG]

I think usually we require to bind an object with a data, such as an
integer. From this object, we can easily and quickly get its bound
integer.

What do you mean by "bind" and "bound" in this context?

std::map requires the object to be compared.

It requires the key type to be comparable somehow, yes. Either using
the default predicate -- std::less<key_type> -- or with a custom
predicate. As long as this binary predicate represents a strict weak
ordering you'll be fine.

Any other way to do it?

What is "it" ?

Cheers!
SG