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Splitting a string in C++
Once I writing a tool for processing some csv files where in I needed to split strings and store them in a vector.I wrote one function for it which i feel like sharing.below is the function to split the string:
std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems) {
std::stringstream ss(s);
std::string item;
while(std::getline(ss, item, delim)) {
elems.push_back(item);
}
return elems;
}
std::vector<std::string> split(const std::string &s, char delim) {
std::vector<std::string> elems;
return split(s, delim, elems);
}
std::stringstream ss(s);
std::string item;
while(std::getline(ss, item, delim)) {
elems.push_back(item);
}
return elems;
}
std::vector<std::string> split(const std::string &s, char delim) {
std::vector<std::string> elems;
return split(s, delim, elems);
}
The given function splits the string and returns a vector of strings.Also i would like to mention that if the string contains empty fields then an empty element is inserted into the vector.
More simple way would be:
#include <sstream>//for std::istringstream
#include <iterator> //for std::istream_iterator
#include <vector>//for std::vector
while(std::getline(in, line))
{
std::istringstream ss(line);
std::istream_iterator<std::string> begin(ss), end;//putting all the tokens in the vector std::vector<std::string> arrayTokens(begin, end);//arrayTokens is containing all the tokens - use it!
}
#include <iterator> //for std::istream_iterator
#include <vector>//for std::vector
while(std::getline(in, line))
{
std::istringstream ss(line);
std::istream_iterator<std::string> begin(ss), end;//putting all the tokens in the vector std::vector<std::string> arrayTokens(begin, end);//arrayTokens is containing all the tokens - use it!
}
I am a software programmer working in India. I usually like to blog in my free time.
Why not use BOOST tokenizer? @see reference below.
ReplyDeletehttp://www.boost.org/doc/libs/1_53_0/libs/tokenizer/
Yeah adam boost can be used. but in caseif anybody dont want to use boost they can use this.
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