cpp useful lambdas code example

Example 1: cpp lambda function

#include <iostream>
using namespace std;

bool isGreater = [](int a, int b){ return a > b; }

int main() {
	cout << isGreater(5, 2) << endl; // Output: 1
	return 0;
}

Example 2: cpp lambda

struct X {
    int x, y;
    int operator()(int);
    void f()
    {
        // the context of the following lambda is the member function X::f
        [=]()->int
        {
            return operator()(this->x + y); // X::operator()(this->x + (*this).y)
                                            // this has type X*
        };
    }
};