What are lambda expressions in C++14 and how are they used in standard algorithms?

Can you explain what lambda expressions are in C++14?

Sure! Lambda expressions in C++14 are a way to create anonymous functions directly in your code. They allow you to define a function inline without needing to create a separate function definition.

How do I use lambda expressions with standard algorithms?

You can use lambda expressions with standard algorithms like std::sort or std::for_each. For example, you can sort a vector of integers using a lambda to define the sorting criteria.

Can you give me a code example of using a lambda with std::sort?

Absolutely! Here's a simple example:

#include <vector>
#include <algorithm>
#include <iostream>

int main() {
    std::vector<int> vec = {5, 2, 8, 1, 4};
    std::sort(vec.begin(), vec.end(), [](int a, int b) { return a < b; });
    for (int n : vec) std::cout << n << ' ';
}

This will sort the vector in ascending order.

What are the benefits of using lambda expressions?

Lambda expressions make your code more concise and readable. They allow you to define functionality in place, reducing the need for separate function declarations and improving code clarity.