From: Marco <marvena@...>
Date: 2007-12-26T16:55:05+09:00
Subject: Index of the n-th occurrence

Hi, some newbie questions...

1) How can I obtain all the indices of the occurrences of a pattern in a 
string (and not only the index of the first one using "index")? And the 
index of the n-th occurrence?

2) What's the simplest way to select elements of a vector,on the basis of a 
condition on a second vector of the same length?

Thanks,

                      Marco