On Tue, Sep 9, 2008 at 4:05 PM, Steven Watanabe wrote:

AMDG

Peter Barker wrote:

...

Hello,

I have the following program:

#include <string>

#include #include

int main() { std::string str("12.5e");

boost::last_finder(str,boost::is_digit()); // <--- is this sort of right? }

What I'm trying to do is find the last occurence of a digit in my string (and learn a bit more about Boost.StringAlgorithms!). Am I going down the correct route here, and if so would someone be so kind to add to my program to show how I could obtain and output the index? The call operator for last_finder accepts two paramters which has thrown me as I thought the range was defined at construction.

last_finder searches for the substring specified in the constructor, in the string passed to the function call operator. You can use the standard library fairly easily in this case:

#include <string> #include <algorithm> #include <iostream>

#include

int main() { std::string str("12.5e"); std::cout << (std::find_if(str.rbegin(), str.rend(), boost::is_digit()).base() - str.begin() - 1) << std::endl; }

In Christ, Steven Watanabe

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Steven, Thanks for your explanation and example. Regards, Pete