[tools] python map()

#include <algorithm>
#include <iostream>
#include <vector>
#include <iomanip>
#include <functional>
#include <iterator>

template<typename Collection, typename unop>
void for_each(Collection col, unop op) {
    std::for_each(col.begin(), col.end(), op);
}

template<typename Collection, typename unop>
Collection map(Collection col, unop op) {
    std::transform(col.begin(), col.end(), col.begin(), op);
    return col;
}

int main()
{
    auto println = [](const char *message) { std::cout << "\n" << message << '\n'; };
    auto lambda_echo = [](int i) { std::cout << std::setw(3) << i; };
    std::vector<int> col{ 23, 23, 37, 42, 23, 23, 37 };

    // call map
    println("running map<T> operation");
    auto add_one = [](int i) { return i + 1; };
    auto new_col = map(col, add_one);
    for_each(col, lambda_echo);

    return 0;
}