Javascript: void (0) is often used in javascript. do you know this is contained? in Javascript, void is an operator that specifies to calculate an expression but does not return a value, this article introduces the true meaning of javascript: void (0) in Javascript. For more information, see if void is an operator in j
Javascript: void (0) is often used in javascript. Do you know this is contained? In Javascript, void is an operator that specifies to calculate an expression but does not return a value, this article introduces the true meaning of javascript: void (0) in Javascript. For more information, see if void is an operator in j
When learning underscore.js, it is often found in the source code that resembles the following:if (context = = = void 0) return func;if (array = = null) return void 0;Have not seen this writing before, to search the Internet some information, just found that stackoverflow on the other people raised similar questions. Summarized here, make a note. Void is actually
I recently encountered a strange problem, when I moved the Django project to another server, I reported the following error:
[Wed Oct 08 15:31:04 2014][ERROR][Client 10.19.81.48] Premature end of script headers:wsgi.py, Referer:: Objects/stringobject.c:115:pystring_fromstring:assertion ' str!= ((void *) 0) ' failed.[Wed Oct 08 15:31:18 2014][ERROR][Client 10.19.81.48] Premature end of script headers:wsgi.py, Referer:Google a few, just start to see pre
The javascript: void (0) label is displayed in many website A labels. We know that clicking is not going to jump to the link, and there is no response, which is usually followed by javascript: void (0) is followed by a js event. Let's take a look.
First look at the example
The Code is as follows:
Copy code
When we click it, www. bKjia. c0m will pop up. The rational connection
Big talk function pointer and enumeration this pair of pointer enumeration, pointer Enumeration
I. Cause
(1)A function pointer is a pointer variable pointing to a function. It is essentially a pointer variable and a
1. pointer to the const objectConst int * P;This P is a pointer to an int-type const object. Const limits the type pointed to by the pointer P rather than P itself. That is to say, P itself is not a const. You do not need to initialize it during definition. You can also assign a value to P to point it to another const object. However, you cannot use P to modify t
Anyone who learns Java knows that void means null and is a keyword in java. Initially, when I knew void, it was public static void main (String[]args) {}, I remember when I was in contact with void, I always had no idea what it was, so I asked the teacher, butThe teacher just said
Overview
Void is a keyword in Java, often encountered in daily development, the Java Main method is defined in the form of void, as follows:
public static void Main (string[] args) {
}
People who have studied Java know that void means empty, and if you ask an old hand, an old hand will tell you, "
Refer to the relevant chapter of "Pointer to a class member function", which includes the term "class member function", but strictly speaking, the member function here only refers to a non-static member function, this term also contains the term "Pointer,But strictly speaking, it does not include an address, and its behavior is not like a pointer. Simply put, it
java.lang.Voidis analogous to java.lang.Integer . is Integer A-a-boxing values of the primitive type. is int A-a-on-the- Void boxing values of the Primitive type void ."But wait, void doesn ' t has any possible values!"right! That's what makes java.lang.Void "uninstantiable".:)It's a nice feature of the Java type system, every primitive type has a boxed equivalen
Many people even some books on the market use void main (), in fact, this is wrong. void Main () has never been defined in C + +. The parent of C + + Bjarne Stroustrup explicitly in the FAQ on his home page that the definition void main () {//} is not and never has been C + +, nor h As it even been c. (void main () nev
Many people even some books on the market use void main (), in fact, this is wrong. void Main () has never been defined in C + +. C + + Father Bjarne Stroustrup explicitly in the FAQ on his home page that the definition void main () {/* ... */} is not and never has been C + +, nor h As it even been c. (void main () nev
Compile error prompt:Error C2440: "static_cast": Cannot convert from "void (__thiscall Cchatdlg::*) (Wparam,lparam)" to "LRESULT (__thiscall CWnd::*) (WPARAM, LPARAM) "1> a cast from a base type to a derived type requires dynamic_cast or static_castTo change the definition:afx_msg void onrecvdata (WPARAM WPARAM, LPARAM LPARAM);Forafx_msg LRESULT onrecvdata (WPARAM WPARAM, LPARAM LPARAM);Compiled byLRESULT i
SPRINGMVC return value type has medelandview,string,void,object numeric type, collection type, etc.The first two have been used since we wrote the case, now look at the return value is voidIf the return value is void, it should be written in conjunction with Ajax.Prepare a user classPackage Demo09return;/** * Created by mycom on 2018/3/26.*/ Public classUserInfo {PrivateString username; PrivateString passwo
My personal understanding about pointer arrays and pointer arrays in C language, pointer Arrays
I. pointer array and pointer Array
1. pointer Array
As the name suggests, an element is an array of all pointers. Its form is simila
When you browse a webpage, you will often find javascript: void (0) in the lower left corner of the browser ). I didn't understand what it meant at the beginning, and I learned the reasons as I learned more deeply. The students joked that this was a major. Some information is missing, and the results are sorted out and used later .... SyntaxHighlighter. all (); when you browse a webpage, you will often find javascript:
1. Location:
Is an image in a Windows window. Its main function is to direct the current webpage to anotherHref is a property of a Web page. It can be used to direct another web page and refresh the page.
2.
A href = "#"> after clicking the link, the page will be rolled up to the top, # The default anchor is # top
After clicking the link, if you do not want to roll the page to the top, you can use href = "javascript: void (0)" instead of href = "#"
javascript-void keyword written in frontECMA-262 defines the keyword (keyword) supported by ECMAScript, and the keyword cannot be used as an identifier for the ECMAScript program (indetifiers). The ECMA-262 standard defines the following keywords: Break Do instanceof typeof Case Else New varCatch finally return voidContinue for Switch whileDebugger function This withdefault if Throw Deleteinch TryvoidAccording to the ECMA-262 definition,
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