Understanding move semantics and rvalues in C and C++

http://eli.thegreenplace.net/2011/12/15/understanding-lvalues-and-rvalues-in-c-and-c/

A good example of the usage of move semantics and rvalue references. 

	#include <algorithm>
	#include <iostream>
	using namespace std;
	class Intvec
	{
	public:
	explicit Intvec(size_t num = 0)
	: m_size(num), m_data(new int[m_size])
	{
	log("constructor");
	}
	~Intvec()
	{
	log("destructor");
	if (m_data) {
	delete[] m_data;
	m_data = 0;
	}
	}
	Intvec(const Intvec& other)
	: m_size(other.m_size), m_data(new int[m_size])
	{
	log("copy constructor");
	for (size_t i = 0; i < m_size; ++i)
	m_data[i] = other.m_data[i];
	}
	Intvec& operator=(const Intvec& other)
	{
	log("copy assignment operator");
	Intvec tmp(other);
	std::swap(m_size, tmp.m_size);
	std::swap(m_data, tmp.m_data);
	return *this;
	}
	//!!! move semantics - move assignment operator
	// It takes the rvalue reference as its function parameter
	Intvec& operator=(Intvec&& other)
	{
	log("move assignment operator");
	std::swap(m_size, other.m_size);
	std::swap(m_data, other.m_data);
	return *this;
	}
	private:
	void log(const char* msg)
	{
	cout << "[" << this << "] " << msg << "\n";
	}
	size_t m_size;
	int* m_data;
	};
	int main()
	{
	Intvec v1(20);
	Intvec v2;
	cout << endl << endl;
	cout << "assigning lvalue...\n";
	v2 = v1;
	cout << "ended assigning lvalue...\n";
	cout << endl << endl;
	//!!! here, instead of call the first copy assignment function, the move assignment function is called,
	// which saves the overhead of creating another temporary object.
	cout << "assigning rvalue...\n";
	v2 = Intvec(33);
	cout << "ended assigning rvalue...\n";
	cout << endl << endl;
	return 0;
	}

view raw Move_Semantics.cpp hosted with ❤ by GitHub

Job Interview Questions - C++

1. How to prevent a user from creating a class instance on the stack?

2. How to prevent a user from creating a class instance on the heap?

3. Smart pointers

4. C++ 11 features

5. Data structures:

map, unordered_map;

hash table, red-black tree;

Issues with hash table

6. Virtual table

- class or instance owned?

7. Usage of function pointers

Job Interview Questions - Algorithms

1. How to combine two ordered array? How about N ordered array?

Computer Graphics Questions in Job Interview

1. When does Depth-Test take place in the openGL graphics pipeline? 

    (Before fragment shader, or after, or can be both?

2. What is the cause of Gimbol Lock?

3. Given two lines in a 3D space, how to calculate the distance between them?

Readings on Physically based Elastic Deformation

 (draft ...busy with confirmation report, coming back soon)

1  Textbooks for Continuum Mechanics

1. Continuum Mechanics

Online book:  Solid Mechanics
(http://homepages.engineering.auckland.ac.nz/~pkel015/SolidMechanicsBooks/index.html)

* A good material for the beginners to get to known the basis of continuum mechanics. I only read to the linear elasticity part.

2. Nonlinear Continuum Mechanics

Bonet, J. and R. D. Wood (2008). Nonlinear continuum mechanics for finite element analysis, 2nd Ed., Cambridge university press.

* Get a deeper understanding of the mathematics behind the continuum machanics, expecially the nonlinear elasticity. I read it through, but havenot got a deep understanding of the virtual work part,

3. Anisotropic Elasticity

Ting, T. C. T. (1996). Anisotropic elasticity: theory and applications, Oxford University Press, USA.

* Even deeper and more difficult mathematics. I just started reading it.

4.    Practical Time-stepping Schemes

Wood, W. (1990). Practical time-stepping schemes, Clarendon Press Oxford, UK.

2   ACM Siggraph Courses

Siggraph1997, Physically Based Modeling Principles and Practice;

Siggraph2001, Physically Based Modeling – similar to Siggraph1997;

Siggraph2008, Real Time Physics;

Siggraph2011, Destruction and Dynamics for Film and Game Production;

Siggraph2012, The classical FEM method and discretization methodology,

  Data-Driven Simulation Methods in Computer Graphics.

Hello world

Hello world! :)