I used to have my own String class with a member method called Chomp which did exactly what you are requiring. The body was something similar to this untested code:

String chomp(String& pSrc, char pMatch){    int matchPos = pSrc.indexOf(pMatch);    // Find the first occurrence of the separator    if (matchPos < 0)   // Separator was not found.    {        String ret = pSrc;  // Return the remainder of the source string.        pSrc = "";          // Clear the source string        return ret;    }    String ret = pSrc.substring(0, matchPos - 1);   // "Chomp" the start of the string up to the separator into the return value    pSrc.remove(0, matchPos);                       // Remove everything up to and including the separator.    return ret;}

Hopefully the above code should be pretty understandable and fixable if there are any errors. Our version worked on a "this" pointer rather than passing in the source string, so we would have something like:

String sourceCoords = "12,47,292,85";int x1 = sourceCoords.chomp(",").toInt();int y1 = sourceCoords.chomp(",").toInt();int x2 = sourceCoords.chomp(",").toInt();int y2 = sourceCoords.chomp(",").toInt();

Hope this is of some use.

• arduino-yun
• string