How Can I Efficiently and Elegantly Iterate Over Words in a String?

Iterating Over Strings: Elegance Meets Efficiency

Iterating over the individual words of a string, especially when separated by whitespace, is a common programming task. While various approaches exist, finding an elegant and efficient solution can be challenging.

Current Method Using StringStream

The example provided utilizes a stringstream, but the OP seeks a more elegant solution. This method is certainly robust, but it involves some character manipulation and is not as concise as desired.

Elegant Solution: Splitting Strings

To achieve both elegance and efficiency, we can utilize C 's split() function. This function takes a string and a delimiter as input and returns a vector containing the split words.

#include <vector>
#include <string>

template <typename Out>
void split(const std::string &s, char delim, Out result) {
    std::istringstream iss(s);
    std::string item;
    while (std::getline(iss, item, delim)) {
        *result++ = item;
    }
}

std::vector<std::string> split(const std::string &s, char delim) {
    std::vector<std::string> elems;
    split(s, delim, std::back_inserter(elems));
    return elems;
}

This solution requires minimal code and is easy to understand. It simply reads the string into a stringstream and uses the getline() function to extract individual words using the specified delimiter. The split strings can then be stored in a vector for further processing.

Do keep in mind, however, that this solution does not skip empty tokens. If you need to remove empty strings, you can further post-process the vector.

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