在上面的代码中,我们定义了一个DeepCopy类,并额外定义了一个深复制构造函数。在main函数中,我们定义了一个source对象,并对它进行了一些操作(同样是修改前三个元素的值)。接着,我们定义了一个copy对象,并将source对象赋值给它。这时,copy对象和source对象都拥有了自己的内存空间,它们互不干扰。我们在copy对象中修改...
其键必须是对象,而值可以是任意的(我一般用此来缓存计算结果,参考java中利用WeakHashMap实现缓存)。 const deepClone = (obj, hash=new WeakMap) => { let data = new obj.constructor(); // 取出循环引用 if(hash.get(obj)) return hash.get(obj) hash.set(obj, data); for(var k in obj) { i...
const deepClone = (obj, hash=newWeakMap) => { letdata =newobj.constructor(); // 取出循环引用 if(hash.get(obj))returnhash.get(obj) hash.set(obj, data); for(varkinobj) { if(obj.hasOwnProperty(k)){ data[k] = deepClone(obj[k], hash); } } returnobj; } WeakMap 健弱引用,帮...
4.3 拷贝构造函数(copy constructor ) (浅拷贝) 4.4 非平凡的类与复制控制 (深拷贝 deep control) 4.5 类的静态成员变量 static member Visual Studio 2022 调试Debug 3分钟掌握C++调试神器-调用堆栈(V) 4.6 继承inherit 4.7 多态polymorphic 与虚函数 virtual function 5 输入输出I/O 难度系数(3):* * * 你...
C.130: For making deep copies of polymorphic classes prefer a virtual clone function instead of copy construction/assignment C.130:实现多态类的深拷贝时,虚clone函数要比拷贝构造函数/赋值运算符好。 Reason(原因) Copying a polymorphic class is discouraged due to the slicing problem, see C.67. ...
constructor(name){ this.name = name; } } Object.assign( Student.prototype, mixin ); let student = new Student('小许'); student.sing(); //输出:小许在唱歌 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
深入理解C/C++ [Deep C (and C++)] (1) 编程是困难的,正确的使用C/C++编程尤其困难。确实,不管是C还是C++,很难看到那种良好定义并且编写规范的代码。为什么专业的程序员写出这样的代码?因为绝大部分程序员都没有深刻的理解他们所使用的语言。他们对语言的把握,有时他们知道某些东西未定义或未指定,但经常不知道...
Problem with copy constructor. by: pallav | last post by: I'm having some trouble with my copy constructor. I've tried using gdb to find the bug, but it seg faults in the destructor. I'm not able to see what I'm doing wrong. Since I'm using pointers, I need deep copy and ...
The solution is to have the compiler perform a deep copy ofHasPointerobjects via an appropriate copy constructor, such as: HasPointer(constHasPointer& rhs) { p =newdouble(*rhs.p); } As a rule, a class with a pointer member probably needs a copy constructor (and as you’ll see in ...
Pull Up Constructor Body,构造函数本体上移1 Pull Up Field,字段上移1 Pull Up Method,函数上移1 push,推送 Push Down Field,字段下移1 Push Down Method,函数下移1 Q quality assurance,质量保证(QA) Queue,队列 Quota,配额 S Table,表 tactical development tools,战术实施工具5,战术开发工具...