Multiple reasons: If you allow field access like shape.x = 90 then you cannot add any logic in future to validate the data. say if x cannot be less than 100 you cannot do it, however if you had setters like public void setShapeValue(int shapeValue){ if(shapeValue < 100){ //do something here like throw exception. } … Read more
Set and Get methods are a pattern of data encapsulation. Instead of accessing class member variables directly, you define get methods to access these variables, and set methods to modify them. By encapsulating them in this manner, you have control over the public interface, should you need to change the inner workings of the class … Read more
I have personally settled on using an underscore prefix for ivars, and this kind of synthesize @synthesize name = _name; That way I don’t mix them up. The major issue with not using self is that this code _name = … is very different from self.name = … When the @property uses the retain option. … Read more
It’s common to put an additional @interface that defines a category containing private methods: Person.h: @interface Person { NSString *_name; } @property(readwrite, copy) NSString *name; -(NSString*)makeSmallTalkWith:(Person*)person; @end Person.m: @interface Person () //Not specifying a name for the category makes compiler checks that these methods are implemented. -(void)startThinkOfWhatToHaveForDinner; @end @implementation Person @synthesize name = _name; -(NSString*)makeSmallTalkWith:(Person*)person … Read more
Neither. You should have methods that do things. If one of those things happens to correspond with a specific internal variable that’s great but there should be nothing that telegraphs this to the users of your class. Private data is private so you can replace the implementation whenever you wish (and can do full rebuilds … Read more
As noted in the section Migration notes on the Setter.Value property page on MSDN, UWP/Windows Runtime does not support bindings in Style Setters. Windows Presentation Foundation (WPF) and Microsoft Silverlight supported the ability to use a Binding expression to supply the Value for a Setter in a Style. The Windows Runtime doesn’t support a Binding … Read more
In addition to @millimoose’s answer, setters can also be used to update other values. function Name(first, last) { this.first = first; this.last = last; } Name.prototype = { get fullName() { return this.first + ” ” + this.last; }, set fullName(name) { var names = name.split(” “); this.first = names[0]; this.last = names[1]; } }; … Read more
There is also the point of view that most of the time, using setters still breaks encapsulation by allowing you to set values that are meaningless. As a very obvious example, if you have a score counter on the game that only ever goes up, instead of // Game private int score; public void setScore(int … Read more
In C# 5 and earlier, to give auto implemented properties an initial value, you have to do it in a constructor. Since C# 6.0, you can specify initial value in-line. The syntax is: public int X { get; set; } = x; // C# 6 or higher DefaultValueAttribute is intended to be used by the … Read more
Tutorial is not really required for this. Read up on encapsulation private String myField; //”private” means access to this is restricted to the class. public String getMyField() { //include validation, logic, logging or whatever you like here return this.myField; } public void setMyField(String value) { //include more logic this.myField = value; }