getter

Why do we use 'this' in setter method but not in getter method? [duplicate]

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-06 11:53:57
问题 This question already has answers here : What is the meaning of “this” in Java? (19 answers) Closed 2 years ago . For example, in the following code: private int id; public void setID(int ID) { this.id = ID; } public void getID() { return id; } Why don't we say return this.id in the getter function or conversely say id = ID in the setter function? Also is this actually necessary? I mean, aren't the functions called through an object, say obj.setid(1) or obj.getid() ? Will it work differently

Objective-C - weak property - getter autoreleases (Automatic Reference Counting)

由 寵の児 提交于 2019-12-06 04:46:23
问题 I have a doubt regarding weak property in ARC (auto reference counting) My understanding (correct me if I am wrong): weak property behaves similar to the assign property except that when the instance that the property was pointing to gets destroyed, the ivar is made to point to nil. Question: I just feel that the getter of the weak property retains and autoreleases. Isn't it suppose to behave like getter of the assign property where the getter doesn't retain and autorelease ?(pls refer to the

benefits of getter/setter VS public vars?

由 可紊 提交于 2019-12-06 04:37:26
问题 Is there a benifit to using: private var _someProp:String; public function set someProp(value:String):void { _someProp = value; } public function get someProp():String { return _someProp; } As opposed to just using: public var someProp:String; I realise using getter/setter can be useful when you need to further processing or need to be notified of when the property is changed like so: public function set someProp(value:String):void { _someProp = value; _somePropChanged = true; doSomethingElse

Why does a readonly property still allow writing with KVC

由 故事扮演 提交于 2019-12-06 03:22:11
问题 I'm working through the "Key Value Coding" chapter in "Programming for Mac OS X". I've built an interface with a slider and a label, both bound to fido, an int. If I set the property for fido to readonly, moving the slider still causes the label to change it's value. I had assumed that I'd get some sort of error for this. If the property is readonly, how come the slider can still write to the property? I thought that it would have no setters created, and KVC wouldn't work. Thanks. Here's the

Accessor Method Performance and Optimization

由 。_饼干妹妹 提交于 2019-12-05 21:40:49
问题 Often, I come across code where the Getter method is repeatedly used/abused to get some value or pass it as a method parameter, for ex: public class Test { public void someMethod() { if(person.getName() != null && person.getName().equalsIgnoreCase("Einstein")) { method1(person.getName()); } method2(person.getName()); method3(person.getName()); method4(person.getName()); } } I usually code it, as below: public class Test { public void someMethod() { String name = person.getName(); if(name !=

DDD and the use of Getters and Setters

由 为君一笑 提交于 2019-12-05 17:45:26
问题 I've read a few articles/posts regarding the use of Getters and Setters, and how they help to defeat the purpose of encapsulation in domain model objects. I understand the logic behind not using setters - you are allowing client code to manipulate attributes of that object, outside the context of the object business rules and invariants. Now this principal does still confuse me. For example, what happens if I need to change the value of a member variable of an object? For example, if the name

Can IntelliJ generate getters without the “get” prefix?

由 ◇◆丶佛笑我妖孽 提交于 2019-12-05 16:53:10
问题 IntelliJ has the cool feature to generate Java getters. For example, for a field private final String foo , it will generate a getter getFoo() . Is there any way I can configure IntelliJ to generate getters in the format String foo() ? I am working mainly with immutable objects and prefer this syntax. 回答1: Neat question! Just to clarify @Danny Dan's answer since IntelliJ 15 has been released... To set this up: Alt + Insert Select Getter Open the template configuration from '...' on the RHS

Getter & setter support with ng-model in AngularJs

由 ぃ、小莉子 提交于 2019-12-05 15:15:45
问题 I am trying to get getter/setter support for ng-model by implementing a directive that will take care of getting and setting the values to/from the view/model. I am almost there, but I end up in infinite $digest loops. The idea is to set ng-model="$someFieldToStoreInTheScope", and then have the getter/setter directive do the updates between that field and the getter/setter functions. I use $watch to update the model using the setter expression when the ngModelController updates the field in

ES6 getter/method without curly braces

由 放肆的年华 提交于 2019-12-05 12:14:38
I have some classes which consist of many short getters/methods. Example: get jQuery() { return this.pageConfig.jQuery || jQuery; } An arrow function with similar content may be written as follows: () => this.pageConfig.jQuery || jQuery; Which is a one-liner and thus consumes only 1/3 of vertical space. But it is not a getter nor a method. Is there a recommended way of writing getters/methods in the form of a one-liner? (if possible without curly braces and without the return keyword) My getters and methods need not modify the object. They are just reading. For a one liner, just go with this:

Is it a good idea to always return references for member variable getters?

由 送分小仙女□ 提交于 2019-12-05 10:06:13
If I have a class that has many int , float , and enum member variables, is it considered efficient and/or good practice to return them as references rather than copies, and return constant references where no changes should be made? Or is there a reason I should return them as copies? There is no reason to return primitive types such as int and float by reference, unless you want to allow them to be changed. Returning them by reference is actually less efficient because it saves nothing ( int s and pointers are usually the same size) while the dereferencing actually adds overhead. If they are
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