Iterating over a vector in reverse direction

Question

I need to iterate over a vector from the end to the beginnig. The \"correct\" way is

for(std::vector::reverse_iterator rit = v.rbegin(); rit !=          


        

Answer 1

I would prefer the reverse iterator variant, because it's still easy to interpret and allows to avoid index-related errors.

Sometimes you can simply use the BOOST_REVERSE_FOREACH, which would make your code look the following way:

reverse_foreach (int value, vector) {
   do_something_with_the_value;
}

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Actually speaking, you can always use foreach statements for these kinds of loops, but then they become a bit unobvious:

size_t i = 0;

foreach (int value, vector) {
   do_something;
   ++i;
}