Boost split in C++ library

Boost::split in C++ library

Boost offers strong tools for adding mature, well-tested libraries to the C++ standard library. The boost: split function, which is a component of the Boost string algorithm library, is examined in this article. The latter has numerous techniques for manipulating strings, including clipping and replacing.

By dividing the given string sequence into tokens and a delimiter, the boost: split function can be used. The third parameter should be a predicate function that specifies the delimiter. If the specified element is a delimiter, the function should return true.

To identify spaces in the provided text and separate them into tokens, we supply an isspace function object in the example that follows. To save tokenized substrings, boost::split also requires a destination sequence container. It should be noted that the function call overwrites the destination container's prior contents after the first parameter, which is the destination container itself.

Example 1:

#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <boost/algorithm/string/split.hpp>
//usage of std 
using std::cout; using std::cin;
using std::endl; using std::string;
using std::vector;
int main() {
    string text = "my name is khan";
    vector<string> words;
    boost::split(words, text, isspace);
    for (const auto &item : words) {
        cout << item << "; ";
    }
    cout << endl;
    return EXIT_SUCCESS;
}

Output:

When two or more delimiters are close to one another, the boost::split function in the preceding code sample stores empty strings. Although, as demonstrated in the following example, we can specify the fourth optional argument boost::token compress on, which causes neighbouring delimiters to be combined. Keep in mind that in order for these two code samples to operate properly, Boost libraries must be installed on the system.

Example 2:

#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <boost/algorithm/string/split.hpp>
using std::cout; using std::cin;
using std::endl; using std::string;
using std::vector;
using std::stringstream;
//usage of libraries
int main() {
    string text = " my name is khan ";
    vector<string> words;


    boost::split(words, text, isspace, boost::token_compress_on);
    for (const auto &item : words) {
        cout << item << "; ";
    }
    cout << endl;


    return EXIT_SUCCESS;
}

Output:

Example 3:

/ /C++ program to divide a string into many substrings separated by
//using a separator boost::split
//this header document includes boost::split function
#include <bits/stdc++.h>
#include <boost/algorithm/string.hpp>
using namespace std;
int main()
{
	string input("my name is khan ");
	vector<string> result;
	boost::split(result, input, boost::is_any_of("\t"));


	for (int i = 0; i < result.size(); i++)
		cout << result[i] << endl;
	return 0;
}

Output: