getter-setter

Correct usage of a getter/setter for dictionary values

前提是你 提交于 2019-11-27 16:11:06
问题 I'm pretty new to Python, so if there's anything here that's flat-out bad, please point it out. I have an object with this dictionary: traits = {'happy': 0, 'worker': 0, 'honest': 0} The value for each trait should be an int in the range 1-10, and new traits should not be allowed to be added. I want getter/setters so I can make sure these constraints are being kept. Here's how I made the getter and setter now: def getTrait(self, key): if key not in self.traits.keys(): raise KeyError return

What is the syntax for accessing PHP object properties? [closed]

感情迁移 提交于 2019-11-27 16:01:09
How do you access a PHP object's properties? Also, what is the difference between accessing an object's property with $this->$property1 vs. $this->property1 ? When I try to use $this->$property1 I get the following error: 'PHP: Cannot access empty property'. PHP's documentation on object properties has one comment which mentions this, but the comment doesn't really explain in depth. Sposmen $property1 // specific variable $this->property1 // specific attribute The general use on classes is without "$" otherwise you are calling a variable called $property1 that could take any value. Example:

Does Javascript have get/set keywords like C#?

百般思念 提交于 2019-11-27 15:48:34
问题 I'm working with XULRunner and came across the following pattern in a code sample: var StrangeSample = { backingStore : "", get foo() { return this.backingStore + " "; }, set foo(val) { this.backingStore = val; }, func: function(someParam) { return this.foo + someParam; } }; StrangeSample.foo = "rabbit"; alert(StrangeSample.func("bear")); This results in "rabbit bear" being alerted. I've never seen this get/set pattern used in Javascript before. It works, but I can't find any documentation

Adding a setter to a derived interface

风流意气都作罢 提交于 2019-11-27 15:31:55
问题 Is it possible somehow to achieve this behavior in C#: public interface IReadOnly { Data Value { get; } } internal interface IWritable : IReadOnly { Data Value { get; set; } } I want to be able to expose a readonly interface to outside assemblies, but use a writable interface internally (which I could also implement in different ways). I know I can use an abstract class which implements IReadOnly but adds setters, but that forces me to derive all internal implementations from that class. 回答1:

Eclipse JDT: Is there a refactoring to replace direct field accesses with setter/getter methods?

对着背影说爱祢 提交于 2019-11-27 14:30:46
问题 I know I can generate setters and getters for fields in the Eclipse source menu, but I'm very surprised it doesn't offer to replace the direct field accessors with calls to the newly created methods. Does anyone know how to do this short of manual search and replace? Thanks! 回答1: There is a way. Focus on the attribute, right click. Select "Refactor" -> "Encapsulate Field". (Edited to explain why it works, even though the menu's title doesn't imply it) The "Encapsulate Field" dialog-box will

(no) Properties in Java?

a 夏天 提交于 2019-11-27 13:24:18
So, I have willfully kept myself a Java n00b until recently, and my first real exposure brought about a minor shock: Java does not have C# style properties! Ok, I can live with that. However, I can also swear that I have seen property getter/setter code in Java in one codebase, but I cannot remember where. How was that achieved? Is there a language extension for that? Is it related to NetBeans or something? Calum There is a "standard" pattern for getters and setters in Java, called Bean properties . Basically any method starting with get , taking no arguments and returning a value, is a

Determine if a JavaScript property has a getter or setter defined?

我与影子孤独终老i 提交于 2019-11-27 13:05:06
Is it possible, given an object and property name to determine if that property is defined using either a getter or setter, or is it completely transparent? I only want to define a getter/setter if there is not already one defined on the property. I need it to work in WebKit/Firefox. I think you're looking for getOwnPropertyDescriptor ? https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptor You can use Object.getOwnPropertyDescriptor(obj, prop) For example: var obj = { first: 1 } obj.__defineGetter__('second', function() { return 2; }); // get

AngularJS ng-model-options getter-setter

假如想象 提交于 2019-11-27 12:48:06
I've just upgrade to angular version 1.3.8. When using 1.2.23 version I've created a directive to convert the data form view to model and vice verse. This is my directive: .directive('dateConverter', ['$filter', function ($filter) { return { require: 'ngModel', link: function (scope, element, attrs, ngModelController) { // Convert from view to model ngModelController.$parsers.push(function (value) { return $filter('date')(new Date(date), 'yyyy-MM-ddTHH:mm:ss') }); // Convert from model to view ngModelController.$formatters.push(function (datetime) { return $filter('date')(datetime, 'MM/dd/yyyy

Why doesn't JAXB generate setters for Lists

喜夏-厌秋 提交于 2019-11-27 11:18:14
When I generate JAXB classes from an XSD, the elements with maxOccurs="unbounded" gets a getter method generated for them, but no setter method, as follows: /** * Gets the value of the element3 property. * * <p> * This accessor method returns a reference to the live list, * not a snapshot. Therefore any modification you make to the * returned list will be present inside the JAXB object. * This is why there is not a <CODE>set</CODE> method for the element3 property. * * <p> * For example, to add a new item, do as follows: * <pre> * getElement3().add(newItem); * </pre> * * * <p> * Objects of the

Getters, setters, and properties best practices. Java vs. C#

依然范特西╮ 提交于 2019-11-27 10:31:08
I'm taking a C# class right now and I'm trying to find out the best way of doing things. I come from a Java background and so I'm only familiar with Java best-practices; I'm a C# novice! In Java if I have a private property, I do this; private String name; public void setName(String name) { this.name = name; } public String getName() { return this.name; } In C#, I see that there are many ways of doing this. I can do it like Java: private string name; public void setName(string name) { this.name = name; } public string getName() { return this.name; } Or I can do it this way: private string name