Re: [Boost-users] Extracting items from a string

Subject: Re: [Boost-users] Extracting items from a string
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-06-29 12:10:46

AMDG

Sean Farrow wrote:
> I have a string of the following format:
>
> 11, 0, 1461, 400
>
> I need to be able to extract any element of the string at any point, so
> for example, the 1, would return 11, or the second world return 0. What is
> the best way of extracting any individual element, without using any
> temporary variables. 
>
> IF I use boost.tokenizer, can I access any element individually, without
> using iterators? Or is there a better way of dealing with this sort of
> string.
>   

If you can't parse the string into a more suitable data structure,
then you can't avoid searching from the beginning of the
string on each access.

Probably the easiest way is
std::string element = *boost::next(make_token_iterator(...), n);

In Christ,
Steven Watanabe