Re: Containers - nontrivial element access

["Randy Brukardt" <randy@rrsoftware.com>]

"Maciej Sobczak" <see.my.homepage@gmail.com> wrote in message
news:1191275759.184463.238350@n39g2000hsh.googlegroups.com...
...
> I would like to swap salaries of two guys which I can refer with the
> index/iterator/cursor/etc. The reference method is not really
> important - what is important is the problem of modifying more than
> one element in the container.

Why don't you just use the Swap operation of the containers? One would
presume that it is implemented as efficiently as possible. (Surely if you
are using the indefinite version of the containers, it would just be a
pointer swap; might be a copy with the definite version of vectors, but that
couldn't be avoided as the object order is significant in that sort of
implementation.)

That surely seems better than using explicit pointers; in most cases,
worries about efficiency are premature (and when they're not, you probably
shouldn't be using the predefined containers anyway).

                               Randy.