instance-variables

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Is there any reason to declare ivars if you're using properties exclusively in Objective-C?

I tend to use properties exclusively in my classes, especially now that you can declare properties in a class extension thanks to the modern Objective-C 2.0 runtime—I use this feature to create \"pri[详细]

2023-02-08 10:32 分类：问答
Instance variable not retaining value in iOS application

I have declared this ivar in my ViewController.h #import <UIKit/UIKit.h> @interface FirstViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>[详细]

2023-02-08 09:08 分类：问答
Privacy: Underscored prototype properties or encapsulated variables?

Something has been bugging me, like people realize something I don\'t. I\'m looking at a FOSS example, (simplified below)... whenever I have a class in JavaScript, I prefer Crockford\'s variable hidin[详细]

2023-02-08 01:15 分类：问答
Why is my instance_variable nil? (2 lines of code)

I\'m trying to create a hash which stores an auto-increment number for a non-existent key. I\'m aware there are other, less brittle, ways to do this; my question is : why does my instance variable fai[详细]

2023-02-07 17:11 分类：问答
Recalling an instance variable in a virtual attribute with Ruby

So I am just starting to make my way through The Pragmatic Bookself\'s, \"Programming Ruby 1.9 (3rd Edition)\" and I\'ve come across some code that I need a little clarification on.[详细]

2023-02-07 09:25 分类：问答
foreign key removed on new/build

hopefully someone can help me understand why this is happening.i setup the following instances... @product = Product.find(params[:id])[详细]

2023-02-07 03:40 分类：问答
What is the conventional way to access instance variables within an object in Ruby?

C开发者_如何学Goonsider the following code: class Dog attr_accessor :name, :color def initialize(name, color)[详细]

2023-02-05 18:52 分类：问答
Class variable and instance variable question in Python

When I have this class, the variable \'value\' is class variable. class Hello: value = 10 def __init__(self):[详细]

2023-02-05 00:18 分类：问答
Why doesn't the instance variable take the new value

Here is a code example: var testObject = { val1:1, testing:function( ) { val1 = 2; alert( va开发者_开发知识库l1 );[详细]

2023-02-04 14:10 分类：问答
Private members in CoffeeScript?

Does somebody know how to make private, non-static members in CoffeeScript? Currently I\'m doing this, which just uses a public variable starting with an underscore to clarify that it shouldn\'t be us[详细]

2023-02-04 10:34 分类：问答