JS object-oriented (3) Object class, static attributes, closures, private attributes, use of call and apply, inherited three implementation methods, objectapply
1. Object Class
In JS, an Object is the base class of all classes. When you use an Object class to create a custom Object, you do not need to define Constructors (constructor, prototype, hasOwnProperty (property ))
var per = new Object();per.name =
This article mainly introduces JS object attributes (check attributes, enumeration attributes, etc.). For more information, see
1. delete attributes
The delete operator can delete object attributes.
The code is as follows:
Delete person. age // that is, the person no long
This article introduces the static and prototype attributes in javascript, and attaches an example analysis. it is very practical. if you need it, you can refer to it. This article will introduce you to the Javascript static method and prototype method. if you do not know about the Javascript static method and prototype method, you can take a look at it with the editor. A piece of code to understand static methods and instance methods:
Script // ob
26th: do not declare attributes in the category. Do not declare attributes in the 26th categories.
AttributeIs the way to encapsulate data (see 6th ).
Attributes only define instance variables and relatedAccess MethodThe"Syntactic sugar", So we should also follow the sameInstance variablesSame rules.
Classification mechanism, Should be understood as a means, t
I. Dependency attributes
The dependency property means that you do not have a value. The value obtained from the data source through binding is dependent on others. Objects with dependency properties are called dependent objects.
Scenarios of application dependency attributes:
1. You want to set attributes in the style.
2. You want the property to support
How to copy an object in js, such as the next js object.If you know all the attributes of this object, you can naturally create a new one, and then assign values to each attribute, you can do it, but if you do not know? How to create an object with the same content?Copy codeThe Code is as follows:Var obj = {colkey: "col", colsinfo: "NameList "} The simplest is to use for in,For example, obj2 has the same attribute
How to copy an object in js, such as the next js object. If you know all the attributes of this object, you can naturally create a new one, and then assign values to each attribute, you can do it, but if you do not know? How to create an object with the same content?
Var obj = {colkey: "col", colsinfo: "NameList"} var obj = {colkey: "col", colsinfo: "NameList,
For example, obj2 has the same attributes as ob
C #3.0 language features: Automatic Properties)
If you are a C # developer, you may be very accustomed to writing types with basic attributes like the following code snippet:
Public class Person {
Private string _ firstName;Private string _ lastName;Private int _ age;Public string FirstName {
Get {Return _ firstName;}Set {_ FirstName = value;}}
Public string LastName {
Get {Return _ lastName;}Set {_ LastName = value;}}Public int Age {
Get {Return _ ag
Use of Custom Attributes in andriod and Custom Attributes in andriod
Custom property file values/attrs. xml:
Attr in the custom property file is a number of custom properties that can be used in the control properties in the layout file.
The attribute formats include the following:
1. reference: refer to a resource ID.
2. color: color value.
3. boolean: boolean value.
4. dimension: dimension value.
5. floa
Linux file attributes and permissions, Linux file attributes and permissions
1. in Linux, any file has three identities: User, Group, and Others.
2. One of the most useful functions of a user group is that when you develop resources in a team, each account can have support for multiple user groups.
Iii. Linux file attributes:
1. After logging on to Linux as a roo
"; } public class NestedClass {} public void Saygreeting (string name) { Console.WriteLine ("Morning:" +name) ; } }whether it is a constructor parameter or a property, it is all written into the parentheses of the constructor, and for the parameters of the constructor, the order and type of the constructor arguments must be taken, so called positional arguments; for attributes, t
. NET attributes and. NET attributes
1. What?What is property?Attribute is the encapsulation of fields. When a field exists in the class, is read-only to control the external performance of this field (for example, accessibility? Write only? Or perform some necessary verification on the Self-read value.) We private this field and set aside a public method for accessing this field. This method is an attribut
() {// This test requires an independent thread} [test, requiresthread (apartmentstate. sta)] public void testrequiringstathread () {// an independent stathread will be created to run this test }}
19, sequentialattribute (nunit 2.5)
SequentialattributeA test method is used to generate a test case using the data items provided by parameters. Each data is used only once. If a parameter has multiple attributes, the order of the data items is uncertain.
Common CSS attributes and values, common CSS attributes
Download a high-definition image: Common css attributes and values (Mind Map summary)
1. Font
Running result:
2. Text
Running result:
3. Background
As the blogger is lazy in looking for background materials, after running the program, it will be ugly, but there will be no errors. You can focus on th
Android-related style attributes and androidstyle attributes
Style attribute values in android
Theme styles defined by the Android platform:
Android: theme = "@ android: style/Theme. dieme" // display an Activity as a Dialog boxAndroid: theme = "@ android: style/Theme. NoTitleBar" // The application title bar is not displayed.Android: theme = "@ android: style/Theme. NoTitleBar. Fullscreen" // The applicati
Common style attributes and style attributesNOTE Information
Review:
Form function:
From the perspective of use: html provides a way to input content.
From the server perspective: provides a way to collect information.
This allows the client to interact with the server.
For example, upload a file on the registration page.
Three common elements: input select textarea
10 common Input types:
Text, password, radio, checkbox, submit, reset, button, image,
1: nextSibling attributes This attribute indicates the next node of the current node (the node after it belongs to the same level as the current node). If it does not have a node of the same level as it later, null is returned.Note that the execution results of this attribute in different browsers are different. See the following example:Let's look at an example:Copy codeThe Code is as follows: On the surface of the object structure, div's nextSibling
For adding and deleting attributes in js, we mostly set the element attributes. Next I will introduce some examples for you to introduce their usage.
1. js Property Operation Induction
We will encounter various operations in the front-end development process, which will involve operation attributes. Below I will tell you several common attribute operations in JS.
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