What is the most efficient C++ method to split a string based on a particular delimiter similar to split method in python?

Question

getline(cin,s);
istringstream iss(s);
do
{
    string sub;
    iss>>sub;
    q.insert(sub);
 }while(iss);

I used this technique when question wanted me to split on the basis of space so can anyone explain me how to split when there's a particular delimiter like ';' or ':'.

Someone told me about strtok function but i am not able to get it's usage so it would be nice if someone could help.

The most efficient way is to SEARCH this information at StackOverflow. Thiis has been answered before. — harper, Jun 20 '14 at 12:54
The most efficient way is to SEARCH this information at Google. (@harper upvoted) — Orelsanpls, Jun 20 '14 at 12:55
@vs13 In future before asking a question you might want to be informed [about this](http://stackoverflow.com/help/how-to-ask) — πάντα ῥεῖ, Jun 20 '14 at 13:04
I implemented a [delimited input stream iterator](https://gist.github.com/sftrabbit/4335b21717fff8f8932a). To use, fill a `std::istringstream` with your string, then do: `std::vector split{delim_istream_iterator<>{ss, ':'}, delim_istream_iterator<>{}};`. Replace `:` with whatever your delimiter is. — Joseph Mansfield, Jun 20 '14 at 14:03

score 17 · Accepted Answer · answered Jun 20 '14 at 12:52

First, don't use strtok. Ever.

There's not really a function for this in the standard library. I use something like:

std::vector<std::string>
split( std::string const& original, char separator )
{
    std::vector<std::string> results;
    std::string::const_iterator start = original.begin();
    std::string::const_iterator end = original.end();
    std::string::const_iterator next = std::find( start, end, separator );
    while ( next != end ) {
        results.push_back( std::string( start, next ) );
        start = next + 1;
        next = std::find( start, end, separator );
    }
    results.push_back( std::string( start, next ) );
    return results;
}

I believe Boost has a number of such functions. (I implemented most of mine long before there was Boost.)

Thanks a lot helping I was looking for something like this thanks :) — vs13, Jun 20 '14 at 12:58
@vs13 You may still wan't to accept this answer if it helped you. Click the big white checkmark in the left ... — πάντα ῥεῖ, Jun 20 '14 at 13:02

What is the most efficient C++ method to split a string based on a particular delimiter similar to split method in python?

1 Answers1