assign class

C + + class prohibits copy constructor and copy assign operatorIn a C + + class, the compiler can secretly create a default constructor, a copy constructor, a copy assignment operator, and a destructor for class. Note that the functions generated by

The Assign method is understood to be to empty the original string first and then assign a new value to replace it.Returns a reference of type string. Its common overloads are also available in the following ways:A. string& assign (const string& str)

A few days ago, I tried to make a very simple control (based on the D5 developer guide)This control uses a class inherited from tpersistent. TypeTsomeobject = Class (tpersistent)PrivateFprop1: integer;Fprop2: string;PublicProcedure assign (Source:

Copy: Create an object with an index count of 1 and then release the old object to NSStringFor NSString it states that a copy of the passed-in value is used when the value is assigned. Copy work is performed by the copy method, and this property is

1. To traverse the properties of the model class, you first have to go through the runtime to get the properties of the model class, and the value of all the properties of the output model is not like traversing a For loop with dictionary and array.

Copy and strong (retain) differences1. http://blog.csdn.net/itianyi/article/details/9018567Most of the time NSString properties are copy, then copy and strong in the case of what is the difference?Like what:@property (retain,nonatomic) NSString

Copy: Create an object with an index count of 1 and release the nsstringIt indicates to nsstring that a copy of the input value is used when the value is assigned. The copy operation is executed by the copy method. This attribute is only valid for

Copy: Create an object with an index count of 1 and release the nsstringIt indicates to nsstring that a copy of the input value is used when the value is assigned. The copy operation is executed by the copy method. This attribute is only valid for

Copy: Create an object with an index count of 1 and then release the old object to NSStringFor NSString it states that a copy of the passed-in value is used when the value is assigned. Copy work is performed by the copy method, and this property is

Can A member of A class be declared using another class? does this function be required to assign values to this member? class { Var $ sun = ''; Var $ sav = false; } Class B { Var $ vo =; Var $ tmp = 0; } Isn't that true? So: class B { Var $