Re: explode equivalent in c++

From:

Alan Johnson <awjcs@yahoo.com>

Newsgroups:

comp.lang.c++

Date:

Tue, 19 Jun 2007 01:11:46 -0000

Message-ID:

<1182215506.374314.84880@n2g2000hse.googlegroups.com>

On Jun 18, 4:35 pm, DJH <nos...@nospam.com> 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!

It shouldn't be hard to cook up an explode function. Here is what I
come up with after a few minutes of tinkering:
#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