A function is a variable that determines the value of another variable by a certain rule, and the corresponding relationship is called a function.
A function is a method by which a value is defined to produce another value based on an artificial operation. Functions are also used in Flash, and six types of functions are defined, as follows:
General guntions function
Eval (varible) Gets the value of a variable
True to get logical "true" values
False to get logical "false" value
NewLine Create a
JS funtion () URL does not jump back to the background action issueToday encountered a baffled problem, resolved now, but still do not know why (estimated because the domain name inconsistency), record$.get (ActionURL,{ "ParentID":p Arentid}, func tion (objresult) { $ ( "#childType"). Find ( $ ( "#childType"). Append ( ' var childtypelist = objresult.data; for (var i=0;i $ ( "#childType"). Append ( " "\" > "+childtypelist[i].typename+ "} } )
(sum (10,10)), //The executable result is 20function sum (num1,num2) { return num1+num2;}Alert (sum (10,10)), the cause of the error during run time the reference to the function is not saved in the variable sum until the statement where the function is executed: return "unexpected identifier" (unexpected identifier error) var sum = function (num1,num2) { return num1+num2;};Of course you can use both function declarations and function expressions such as var sum = Fu
, configuration mechanism #1 is the only option to access the PCI configuration space.
The RW software can read the mcfg base address:
Figure 1
At the same time, we can also see the value of b0d2f0's register:
Figure 2 then, based on the base address f8000000 and b0d2f0, according to The PCIe cofigration space address specification, we can get the address f8010000. We can read it through Dumphys to change the physical address value:
The value read in Figure 3 is 07 04 90 00, which corresponds t
"PHP template Engine" Prototype prototype release! , prototype prototype
At the beginning of the article, we must first say sorry to the people who have been concerned about me! It was originally intended to complete the first edition of the PHP template engine immediately after the front end Framework 5.0 was release
Used JavaScript students are sure to prototype thunderclap piercing, but this is what it is a beginner mixed, only know that the function will have a prototype attribute, you can add a function for instance access, the other is not clear, recently read some The JavaScript Advanced program design, finally unveiled its mysterious veil.
Each function has a prototype
Deep understanding of JS prototype and prototype chain, and deep understanding of js prototype
PrototypeIt is a concept that is hard to understand in JavaScript. There are also many prototype-related attributes, the object has the prototype attribute, and the function object
JavaScript exploration: Powerful prototype and prototype chain, and javascript exploration prototype
// The foo variable is for (var I in foo) {if (foo. hasOwnProperty (I) {console. log (I) ;}} in the preceding example );}}
JavaScript does not contain the traditional class inheritance model, but uses the prototypal prototype
The prototype in JavaScript is completely parsed, and the prototype is prototype.
To understand prototype in JS, you must first understand the following concepts:1. Everything in JS is an object
2. All things in JS are derived from objects, that is, the end point of the prototype
Talking about the JS prototype object and prototype chain, talking about the js prototype
In Javascript, all objects are objects, but objects are also different. They can be divided into two types: common objects and Function objects ).
In general, the objects generated through the new Function are Function objects, and other objects are common objects.
Example:
Analyze the javascript prototype and prototype chain, and analyze the javascript prototype
Each function we create has a prototype attribute, which is a pointer pointing to a prototype object, the attributes and methods in the prototype
prototypesin JavaScript , there are two types of prototypes: Display Prototypes (prototype) and implicit prototypes (__proto__). __proto__(implicit prototype) any object in JavaScript has a built-in property [[prototype]]and there is no standard way to access this built-in property before ES5, but most browsers support it through __proto __ to visit. ES5 has a Ge
Prototype prototypes:I. Relationship of functions to objects1. A function is one of the objects (the function is the object type)Example: function fn1 () {...}Console.log (fn1 instanceof Object);Returns true, stating that the function (FN1) is an object type.2. The object is created by the functionExample: var obj = new Object ();var arr = new Array (3);Arr[0] = 0;ARR[1] = 1;ARR[2] = 2;Console.log (typeof Object); Obj is created by objectConsole.log (
Introduction to the prototype of JavaScript design patterns (Object. create and prototype), object. prototype
Prototype description
Note: You can use a prototype instance to copy and create new custom objects. You do not need to know the specific process of creating the ori
One, instanceof:instanceof detects if there is a prototype prototype on the right side of the __PROTO__ prototype chain on the left. I've been in two previous articles[JS Master's Road] the basic characteristics and advantages and disadvantages of the constructor function[JS Master's Road] step-by-step graphical JavaScript pr
In-depth analysis on prototype of ctipt PT: Is prototype attributes a copy, a reference, or a fixed search method?
---- 01 _ modifying prototype attributes//
//
Output:
After the instance is created, person1.username: zhangsanAfter the instance is created, person2.username: zhangsan
After the prototype is modified, per
A misunderstanding of Javascript prototype chain and prototype, a misunderstanding of javascript prototype
Previously, I was confused about prototype inheritance and identifier search in the prototype chain of Javascript,
For example, the following code:
Copy codeThe Code is
Understanding the prototype and prototype chain in javascript, understanding the prototype of javascript
Prototype
As we all know, JavaScript does not contain the traditional class inheritance model, but uses the prototype model. Code implementation is like this.
function S
We proceed as above, we have solved the method sharing problem of multiple instances by prototyping, then we will figure out the prototype of the prototype and the context of the prototype chain.1 functionCreateobj (uName) {2 This. UserName =UName;3 }4CreateObj.prototype.showUserName =function(){5 return This. UserName;6
we Proceed as above, we have solved the method sharing problem of multiple instances by prototyping, then we will figure out the prototype of the prototype and the context of the prototype chain.function Createobj (uName) {this.username = UName;} CreateObj.prototype.showUserName = function () {return this.username;} var obj1 = new Createobj (' Ghostwu '); var obj
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