How to Capture std::vector in Lambda Function in C++?

Programmers can define an inline function anywhere in the code thanks to C++'s lambda functions. They are also capable of capturing objects outside of their definition. We'll look at how to use C++ lambda functions to capture a std::vector object in this post.

Capture std::vector in Lambda Function.

The std::vector container object that exists outside of the lambda function declaration can be captured using the lambda expression's capture clause. The capture by value and reference methods are allowed by the capture clause.

Capture by Value:

Capture by Reference:

Program:

Let us take an example to illustrate how to capture std::vector in lambda function in C++.

Output:

Benefits of std::vector in Lambda Function in C++

In C++, using std::vector with lambda functions can improve the code's expressiveness and flexibility in several ways. Here are a few specific advantages:

1. Dynamic Resizing: As std::vector offers dynamic resizing, managing collections of objects is made simple, and you don't have to worry about their fixed size. When combined with std::vector, lambda functions can perform dynamic operations like filtering, mapping, and element transformation.
2. Brief Syntax: Code can be written more succinctly and expressively when lambda functions and std::vector are combined. Lambdas can write operations like iteration, transformation, and filtering directly, negating the need for explicit loops and temporary variables.
3. Readability and Maintainability: By keeping the logic close to where it's utilized, lambda functions that are specified inline can make the code easier to read. Since it identifies the container being worked on, the code is easier to comprehend when lambda operations' results are stored in std::vector.
4. Algorithm Compatibility: The C++ Standard Template Library (STL) contains several readily compatible algorithms with std::vector. Lambda functions can apply algorithms such as std::transform, std::for_each, and std::remove_if to vectors, offering a strong and adaptable method of processing items.
5. Automatic Memory Management: Memory management is handled automatically by std::vector, ensuring that elements are allocated and deallocated effectively.

By defining operations using lambda functions, manual memory management is unnecessary, lowering the risk of memory leaks and mistakes.