How to use boost split to split a string and ignore empty values?

Question

I am using boost::split to parse a data file. The data file contains lines such as the following.

data.txt

1:1~15  ASTKGPSVFPLAPSS SVFPLAPSS   -12.6   98         


        

Answer 1

I would recommend using C++ String Toolkit Library. This library is much faster than Boost in my opinion. I used to use Boost to split (aka tokenize) a line of text but found this library to be much more in line with what I want.

One of the great things about strtk::parse is its conversion of tokens into their final value and checking the number of elements.

you could use it as so:

std::vector tokens;

// multiple delimiters should be treated as one
if( !strtk::parse( dataLine, "\t", tokens ) )
{
    std::cout << "failed" << std::endl;
}

--- another version

std::string token1;
std::string token2;
std::string token3:
float value1;
float value2;

if( !strtk::parse( dataLine, "\t", token1, token2, token3, value1, value2) )
{
     std::cout << "failed" << std::endl;
     // fails if the number of elements is not what you want
}

Online documentation for the library: String Tokenizer Documentation Link to the source code: C++ String Toolkit Library