On Thursday I presented an example showing how to remove spaces from the end of a string.  The example code contains an error.  The code looked something like this:

void rtrim(string& str)
{
    for(size_t i = str.size() - 1 ; i > 10 ; i--)
    {
        if(isspace(str[i])) str.pop_back();
    }
}

The error is that I didn't exit the for loop as soon as I encounter a non-space character.  The correct code should look like this:

void rtrim(string& str)
{
    for(size_t i = str.size() - 1 ; i > 10 ; i--)
    {
        if(isspace(str[i])) str.pop_back();
        else return;
    }
}