Quick and Clean: Join a Vector of Strings with a Separator

Content

Let's say you have a vector of strings, and you want to join them into a single string with a separator like a comma or space. Here’s how you can do it:

#include <iostream>
#include <vector>
#include <string>

std::string joinStrings(const std::vector<std::string>& strings, const std::string& separator) {
    std::string result;
    for (size_t i = 0; i < strings.size(); ++i) {
        if (i != 0) {
            result += separator;
        }
        result += strings[i];
    }
    return result;
}

int main() {
    std::vector<std::string> words = {"Hello", "world", "this", "is", "C++"};
    std::string joinedString = joinStrings(words, ", ");
    std::cout << joinedString << std::endl;
    return 0;
}

In this code:

• We define a function `joinStrings` that takes a vector of strings and a separator string as parameters.
• We iterate through the vector, appending each string to the result with the specified separator.
• The `main` function demonstrates how to use this function by joining a vector of words into a single string separated by commas and spaces.

Conclusion

Joining a vector of strings with a separator is a straightforward task in C++. By using the code provided, you can efficiently concatenate multiple strings into one, making your code cleaner and more maintainable. This method is particularly useful for generating comma-separated values (CSV) or creating formatted output.