One downside is that you would break the chained assignment semantics: $ irb irb(main):001:0> x = y = 3 => 3 irb(main):002:0> p x 3 => nil irb(main):003:0> p y 3 => nil irb(main):004:0> Consider: x = MyClass.property = 3 Then x would take true if this worked as you had expected (right-associativity). That could … Read more
AutoMapper allows now (I am not sure, since when) to map properties with private setters. It is using reflection for creating objects. Example classes: public class Person { public string Name { get; set; } public string Surname { get; set; } } public class PersonDto { public string Fullname { get; private set; } … Read more
They are almost exactly equivalent except that the first method (using an object initializer) only works in C# 3.0 and newer. Any performance difference is only minor and not worth worrying about. They produce almost identical IL code. The first gives this: .method private hidebysig instance void ObjectInitializer() cil managed { .maxstack 2 .locals init … Read more
I don’t see why an interface can’t define getters and setters. For instance, List.size() is effectively a getter. The interface must define the behaviour rather than the implementation though – it can’t say how you’ll handle the state, but it can insist that you can get it and set it. Collection interfaces are all about … Read more
You can’t use set like that because when you call self.document = newValue you’re just calling the setter again; you’ve created an infinite loop. What you have to do instead is create a separate property to actually store the value in: private var _document: UIDocument? = nil var document: UIDocument? { get { return self._document … Read more
Using Proxies, you can get the desired behavior: var _arr = [‘one’, ‘two’, ‘three’]; var accessCount = 0; function doSomething() { accessCount++; } var arr = new Proxy(_arr, { get: function(target, name) { doSomething(); return target[name]; } }); function print(value) { document.querySelector(‘pre’).textContent += value + ‘\n’; } print(accessCount); // 0 print(arr[0]); // ‘one’ print(arr[1]); // … Read more
Property Set is for objects (e.g., class instances) Property Let is for “normal” datatypes (e.g., string, boolean, long, etc.)
=========================================================================== Update: July 19, 2017 Now the Rails documentation is also suggesting to use super like this: class Model < ActiveRecord::Base def attribute_name=(value) # custom actions ### super(value) end end =========================================================================== Original Answer If you want to override the setter methods for columns of a table while accessing through models, this is the way to … Read more
From my perspective as sitting with 4 million lines of C++ code (and that’s just one project) from a maintenance perspective I would say: It’s ok to not use getters/setters if members are immutable (i.e. const) or simple with no dependencies (like a point class with members X and Y). If member is private only … Read more
These setter and getter allow you to use the properties directly (without using the parenthesis) var emp = new Employee(“TruMan1”); if (emp.name) { // uses the get method in the background } emp.name = “New name”; // uses the setter in the background This is only to set and get the value of the property.