Re: explode equivalent in c++

From:

Alan Johnson <awjcs@yahoo.com>

Newsgroups:

comp.lang.c++

Date:

Mon, 18 Jun 2007 18:09:12 -0700

Message-ID:

<f57abo$u25$1@aioe.org>

DJH wrote:

I am trying to find the most efficient way to code a php explode in C++.

What existing STL function may I use to separate this in to its parts
where the delimiter is "||" ?

example:

~!||1||1||foobar

I would like a string array as such

stringarray[0]="~!"
stringarray[1]="1"
stringarray[2]="1"
stringarray[3]="foobar"

Thanks in advance!

Writing an explode function should not be too difficult. E.g.:
#include <vector>
#include <string>

std::vector<std::string> explode(
     const std::string & in,
     const std::string & delim)
{
     typedef std::string::size_type size_type ;

     const size_type delim_len = delim.length() ;
     std::vector<std::string> result ;

     size_type i = 0, j ;
     for (;;)
     {
         j = in.find(delim, i) ;
         result.push_back(in.substr(i, j-i)) ;
         if (j == std::string::npos)
             break ;
         i = j + delim_len ;
     }

     return result ;
}

#include <iterator>
#include <algorithm>
#include <iostream>

int main()
{
     std::vector<std::string> parts = explode("~!||1||1||foobar", "||") ;
     std::copy(parts.begin(), parts.end(),
         std::ostream_iterator<std::string>(std::cout, "\n")) ;
}

--
Alan Johnson