accessor

Accessors are only available when targeting ECMAScript 5 and higher

由 旧街凉风 提交于 2019-12-03 14:25:45
问题 I am trying to run this code but it is giving me following errors: Animal.ts(10,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. Animal.ts(14,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. interface IAnimal{ name : string; sayName():string; } class AnimalImpm implements IAnimal{ private _name : string = '[Animal]'; get name():string{ return this._name; } set name(name:string){ this._name = name; } constructor(name

What is the purpose of accessors?

由 匆匆过客 提交于 2019-12-03 11:20:01
Can somebody help me understand the get & set ? Why are they needed? I can just make a public variable. Warning : I am assuming you already know about object-oriented programming . What are properties? Properties are language elements that allow you to avoid the repetitive getXYZ() accessors and setXYZ() mutators techniques found in other languages, like Java. Why do they exist? They aim to solve the following problems: Saying get and set in the beginning of every access or mutation of a value is annoying and distracting. In Java, you often say: class person { private int _age; public void

“Read only” Property Accessor in C#

由 你说的曾经没有我的故事 提交于 2019-12-03 09:54:55
I have the following class: class SampleClass { private ArrayList mMyList; SampleClass() { // Initialize mMyList } public ArrayList MyList { get { return mMyList;} } } I want users to be able to get mMyList which is why i exposed the "get" via a property however i don't want changes they make to the object (ie. MyList.Add(new Class());) to make its way back into my class. I guess i can return a copy of the object but that may be slow and i'm looking for a way that will provide a compile-time error informing the user that they shouldn't expect to be able to modify the returned value from the

Visual Studio keyboard short-cut to complete default accessors {get; set;}

由 瘦欲@ 提交于 2019-12-03 08:12:56
问题 I am looking for a keyboard short-cut to complete creating the default accessors for a property in a C# class. Something like... I start typing: public int Id Then I press one or more keys, and I endup with: public int Id { get; set; } 回答1: The shortcut is the trigger "prop": prop tab tab int tab Id tab and you end up with: public int Id { get; set; } 回答2: Try with propfull , then TAB Twice and you'll get: private int myVar; public int MyProperty { get { return myVar;} set { myVar = value;} }

How do I access my Application Delegate's window accessor method from another object?

由 余生颓废 提交于 2019-12-03 07:30:52
问题 As mentioned before - I'm an Objective-C newbie of the first order but having read 4 physical books on the subject and a bucket-load of ebooks and documentation I still can't find what I'm looking for. I have a top-level content view controller that wants to configure its view property from the physical dimensions of the window property of the application delegate. This is something that several people have already asked questions on. ( [UIScreen mainScreen] doesn't cut it for reasons already

Accessors are only available when targeting ECMAScript 5 and higher

由 断了今生、忘了曾经 提交于 2019-12-03 04:16:31
I am trying to run this code but it is giving me following errors: Animal.ts(10,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. Animal.ts(14,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. interface IAnimal{ name : string; sayName():string; } class AnimalImpm implements IAnimal{ private _name : string = '[Animal]'; get name():string{ return this._name; } set name(name:string){ this._name = name; } constructor(name:string){ this.name = name; } sayName():string { console.log(`My name is ${this.name}`); return "Hello"

How to avoid getters and setters

由 荒凉一梦 提交于 2019-12-03 03:11:44
问题 I have read in many places that "getters and setters are evil". And I understood why so. But I don't know how to avoid them completely. Say Item is a class that has information about item name, qty, price etc... and ItemList is a class, which has a list of Items. To find the grand total: int grandTotal() { int total = 0; for (Item item: itemList) total += item.getPrice(); return total; } In the above case, how does one avoid getPrice()? The Item class provides getName, setName, etc.... How do

Visual Studio keyboard short-cut to complete default accessors {get; set;}

由 会有一股神秘感。 提交于 2019-12-03 01:04:39
I am looking for a keyboard short-cut to complete creating the default accessors for a property in a C# class. Something like... I start typing: public int Id Then I press one or more keys, and I endup with: public int Id { get; set; } The shortcut is the trigger "prop": prop tab tab int tab Id tab and you end up with: public int Id { get; set; } Try with propfull , then TAB Twice and you'll get: private int myVar; public int MyProperty { get { return myVar;} set { myVar = value;} } You could also create a custom snippet: <CodeSnippets xmlns="http://schemas.microsoft.com/VisualStudio/2005

Intermingling attr_accessor and an initialize method in one class

由 烂漫一生 提交于 2019-12-03 00:55:16
问题 I see code like: class Person def initialize(name) @name = name end end I understand this allows me to do things like person = Person.new and to use @name elsewhere in my class like other methods. Then, I saw code like: class Person attr_accessor :name end ... person = Person.new person.name = "David" I'm just at a loss with these two methods mesh. What are the particular uses of def initialize(name) ? I suppose attr_accessor allows me to read and write. That implies they are two separate

How do I access my Application Delegate's window accessor method from another object?

由 折月煮酒 提交于 2019-12-02 22:20:19
As mentioned before - I'm an Objective-C newbie of the first order but having read 4 physical books on the subject and a bucket-load of ebooks and documentation I still can't find what I'm looking for. I have a top-level content view controller that wants to configure its view property from the physical dimensions of the window property of the application delegate. This is something that several people have already asked questions on. ( [UIScreen mainScreen] doesn't cut it for reasons already aired many times before on this forum). Therefore, the logical approach would be for the content view
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