setter

问题 I am trying to create a custom setter method for my property. Below is my code. I am getting a waring Attempting to access 'myProperty' within its own getter var myProperty:String{ get { if CONDITION1 { return CONDITION1_STRING }else if CONDITION2 { return CONDITION2_STRING }else{ return myProperty } } set{ } } What is wrong in my code. can any body help to fix this. 回答1: Create a backing ivar and add a custom setter: private _myProperty: String var myProperty: String { get { if CONDITION1 {

问题 I'm new to Java, but have some OOP experience with ActionScript 3, so I'm trying to migrate relying on stuff I know. In ActionScript 3 you can create getters and setters using the get and set keywords, meaning you create a method in the class and access data through a property of an instance of that class. I might sound complicated, but it's not. Here's an example: class Dummy{ private var _name:String; public function Dummy(name:String=null){ this._name = name; } //getter public function get

问题 I have a class for products import from CSV file operation which requires about 7 parameters. This is an info which is definitely needed for importer. All of this parameters have the same life time. In the end we must have an Immutable Object. I was too scared to list all of them in constructor because of its affect to readability and decided to move 3 of them to setters injection. But obviously it's not an elegant solution. Questions: 1) Is mixing constructor-based and setter-based

问题 I have a class for products import from CSV file operation which requires about 7 parameters. This is an info which is definitely needed for importer. All of this parameters have the same life time. In the end we must have an Immutable Object. I was too scared to list all of them in constructor because of its affect to readability and decided to move 3 of them to setters injection. But obviously it's not an elegant solution. Questions: 1) Is mixing constructor-based and setter-based

问题 Following are the two approaches: constructor with all the class properties Pros: I have to put an exact number of types of parameters so if I make an error the compiler warns me (by the way, is there a way to prevent the problem of having erroneously switched two Integer on the parameter list?) Cons: if I have lots of properties the instantiation line can become really long and it could span over two or more lines setters and the default empty constructor Pros: I can clearly see what I'm

问题 I'm trying to write a method that acts as a setter and takes some extra arguments besides the assigned value. Silly example: class WordGenerator def []=(letter, position, allowed) puts "#{letter}#{allowed ? ' now' : ' no longer'} allowed at #{position}" end def allow=(letter, position, allowed) # ... end end Writing it as an indexer works and I can call it like this: gen = WordGenerator.new gen['a', 1] = true # or explicitly: gen.[]=('a', 1, true) But when I try any of the following, the

问题 I've a list of strings, field names, of a class in a loop from resource bundle. I create an object and then using loop i want to set values for that object. For example, for object Foo f = new Foo(); with parameter param1, I have string "param1" and I somehow want to concate "set" with it like "set"+"param1" and then apply it on f instance as: f.setparam1("value"); and same for getter. I know reflection will help but I couldn't manage to do it. Please help. Thanks! 回答1: You can do something

问题 Consider the following class definitions class of2010(object): def __init__(self): self._a = 1 self._b = 2 self._c = 3 def set_a(self,value): print('setting a...') self._a = value def set_b(self,value): print('setting b...') self._b = value def set_c(self,value): print('setting c...') self._c = value a = property(fset=self.set_a) b = property(fset=self.set_b) c = property(fset=self.set_c) note that set_[a|b|c]() do the same thing. is there a way do define: def set_magic(self,value): print(

问题 Is it possible to assign properties with private setters using AutoMapper? 回答1: If you set the value for this properties in the constructor like this public class RestrictedName { public RestrictedName(string name) { Name = name; } public string Name { get; private set; } } public class OpenName { public string Name { get; set; } } then you can use ConstructUsing like this Mapper.CreateMap<OpenName, RestrictedName>() .ConstructUsing(s => new RestrictedName(s.Name)); which works with this code

问题 I would like to know a good syntax for C++ getters and setters. private: YourClass *pMember; the setter is easy I guess: void Member(YourClass *value){ this->pMember = value; // forget about deleting etc } and the getter? should I use references or const pointers? example: YourClass &Member(){ return *this->pMember; } or YourClass *Member() const{ return this->member; } whats the difference between them? Thanks, Joe EDIT: sorry, I will edit my question... I know about references and pointers,