= function () {} MyObject.prototype.whoAmI = function () { Console.log (this = = = window?) "Window": "MYOBJ"); }; Now for the sake of convenience, we create a new variable to guide the WhoAmI method, so we can directly use WhoAmI () instead of the longer obj.whoami ():Next, to make sure everything is going as we predicted, we can print out the WhoAmI:The result is:function () { No mistakes!But now let's look at two ways of referencing:Obj.
Look at the wrong procedure, I do not know how to change, I learned through C, accumulated some C programming often make mistakes, write to you for reference.
1. When writing identifiers, the difference between uppercase and lowercase letters is ignored.
Copy Code code as follows:
Main ()
{
int a=5;
printf ("%d", A);
}
The compiler says that a and a are two different variable names, and the error message is displayed
(function () { self.clearboard ();}, 0);
The second approach is to use the bind () method, but this is a bit more complicated than the previous one.
Game.prototype.restart = function () { this.clearlocalstorage ();
This.timer = settimeout (This.reset.bind (this), 0); };
Game.prototype.reset = function () { this.clearboard ();};
In the example above, two this refers to Game.prototype.
Common mistakes Two: The life
Python is a simple and easy to learn programming language, concise and clear syntax, and has a rich and powerful class library. Unlike most other programming languages, which use braces differently, it uses indenting to define statement blocks.
In normal work, Python developers are easy to make a few small mistakes, these errors are easy to avoid, this article summed up the Python developers the most common mista
Css+div is one of the commonly used terms in Web site standards (or "web standards"), usually to illustrate the difference in how tables are positioned in the HTML web design language, because the XHTML web design standard does not use the table positioning technique, but instead uses the css+ Div way to achieve a variety of positioning. It is easy to make some mistakes when applying div+css coding. This article lists some of the common errors:
1. Ch
Article Description: Fine Number 10 large Web page visual design error user experience need attention.
Introduction: In the increasingly developed network today, we must have seen many sites, but most of the site's design is very bad. These poorly designed sites not only have a lot of problems with the layout, but also do not pay much attention to the user experience, resulting in the loss of a large number of users. Albertus Adrianto, a professional designer in Indonesia, recently wr
September 1, 08, the author officially entered the sacred industry SEO, the author of the road from the SEO Seoer began, at that time to receive the responsibility for the optimization of the three Domain name Web site (at that time I do not know what is called optimization), altogether to optimize the 15 core keywords. At that time I was also doing while learning, and this is also a lot of SEO new people in common, so make mistakes page inevitable.
case.
. NET technology is excellent, but there are a lot of places where there are big and small mistakes in execution. On the big side, Internet-facing technology systems like. NET have to be cross-platform in nature. Only Cross-platform, can overwrite each node on the network, make originally heterogeneous network homogeneity, make. NET become the API of the Internet, if can achieve this goal, then. NET is generations. But Microsoft has not done so
. Make eval () functions more secure.
6. when an invalid delete command is run, an error is reported: The delete command cannot be executed on the attributes not in the class. Normally, this is ignored silently, but an error is reported in strict mode.Conclusion
Just like other technical languages, the deeper you know about JavaScript, how it works, and why it works, the more skillful you can master and use it. On the contrary, if you lack the knowledge of the JS model, you will encounter many p
: finding characters and substringsDividing Strings: Split stringCombining Strings: Stitching stringsGetting C Strings: Get the C language stringGetting characters and Bytes: getting characters or bytesGetting A string ' s length: Gets the lengths of the stringsWriting to a file or URL: Writes the content to a document or URLCreating and Initializing A string from a file: Create and initialize a string from a documentDeprecated: DeprecatedCreating and Initializing Strings: Creating an initializa
-plugin.xml:8:59-package-jar:file:/d:/software/jboss-4.2.2.ga/server/default/deploy/order.war/web-inf/ lib/struts2-json-plugin-2.2.1.1.jar!/struts-plugin.xml:8:59 The cause is probably the war file or There are duplicate Plugin.jar packages in the deployment , there are duplicates removed, if the check is not repeated there is still a problem, remove the already deployed projects, restart Tomcat or JBoss server redeployment instead of redeploy, eventually resolve the issue. --------------------
on the order of the directory configuration to find and run, so the configuration in the Classpath directory is in orderthe difference between 2.1.5 path and ClasspathThe path environment variable is an executable file, such as an. exe file, where the executable file is located in the current path, and if it is not found, go to the path configured in the PATH environment variable to findThe directory where the Java class (. Class) run files are recorded in the CLASSPATH environment variable 2
ways:[Java]View Plaincopy
1. Use double quotes
String x = "abc";
2. Use constructor
String y = new string ("abc");
What's the difference between them? The following example can give an answer:[Java]View Plaincopy
stringa= "ABCD";
stringb= "ABCD";
System.out.println (a==b); //NBSP;TRUENBSP;NBSP;
System.out.println (a.equals (b)); //NBSP;TRUENBSP;NBSP;
NBSP;NBSP;NBSP;
stringc=newstring (
stringd=newstring (
System
Some of the things that are easy to make mistakes in java-general Linux technology-Linux programming and kernel information. The following is a detailed description. 1) instanceof: the class object that implements an interface is also an instance of this interface; a certain class object is also an instance of this super class.
2) The native () modifier method does not have a method body. Use a semicolon ";" instead of braces.
3) main is not a k
conversion is performed between class hierarchies;In the downstream conversion, dynamic_cast has the function of type checking, which is more secure than static_cast.Also note: A should have virtual function, otherwise it will compile error; static_cast does not have this limitation.This isbecause run-time type checking requires run-time type information, this information is stored in the class's virtual function table(With regard to the concept of virtual function tables, in detail #include (i
program project together. The code they develop is normal and secure, but the security vulnerabilities may occur when they are integrated.
In reality, software always has vulnerabilities, which happen every day. Security Vulnerabilities are only one of the many vulnerabilities. Enhancing employee training can indeed improve the code quality to a certain extent. However, it should be noted that anyone will make mistakes and the vulnerability is inevit
Apple tablet keys and power cords placed in one place is one of the biggest mistakes, why? My cub used for a year, the power cord is not in contact, to press the button to charge. This indicates that the solder has a loose-off problem. Either the power socket is placed elsewhere, not with the key, or with the soft button of induction--the same as the case table, preferably two solutions. This repair is very complicated. It's hard enough to dismantle,
1, Sharedpreferences Prefs.edit (). putstring ("SHAKE", Object.getstring ("SHAKE")).commit ();Sharedpreferences When the value is stored, put in, must commit, otherwise it will not take effect. 2. Thread new Thread () {public voidRun (){ 。。。。。 }; }.start ();thread, a long time ago I new a thread, the result forget start, I tangled for a long time ... Only to find that there was no start. Later, I remember the thread to start, the result forgot to run, in-line write what code all error, finally f
Three main mistakes
The first is focusing on process ignoring people. The agile declaration enlightened the meaning that "people and communication are better than processes and tools ". But there are still many enterprises trying to implement Agility by creating a perfect process. It is undeniable that a reasonable process plays a certain role in improving the efficiency of the team. However, to truly benefit from agile improvement, enterprises must i
Hard Disk repair mistakes, defects, parameters, and low Space
Author: Gao Peng
Jump out of hard drive misunderstanding
In 1995, I accidentally saw a strange object from my colleague and curiously asked what it was. My friend replied, "this is a hard drive for a computer !" This is the first time that Gao Peng knows about hard disks.
Over the past few years, more and more computers and more computer problems have emerged. Gao Peng has the opportunity
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