# "Single underline" The starting member variable is called a protection variable, meaning that only class objects and subclass objects can access these variables themselves; # "Double underline" begins with a private member, meaning that only the class object can access it, and even the subclass object cannot access the data. Classpub (object):var1= ' Hello ' _var2= ' yes ' __var3= ' hah ' def__init__ (
void (0) is used to perform certain processing, but does not refresh the page as a whole.Javascript:void (0) indicates that no action is done. Such as:This indicates that this link does not do a jump action, performing the onclick event.I'd like to use Ajax for all the usual code like this: But what is the meaning of void (0) here?In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value.The void ope
then execute the kill PIDTermination of the foreground process:CTRL + COther effects of KillIn addition to terminating the process, kill can also send other signals to the process, using kill-l to see the signals that kill supports.Sigterm is the signal that kill sends without parameters, meaning that the process terminates, but execution depends on whether the process supports it. If the process has not been terminated, you can use the Kill-sigkill
For software development, Pan is actually a jargon, not a pan. the meaning of panPan was developed from the word panorama, meaning panorama. Of course, this panorama you can only see part of, and then you can press the side of the panorama, drag, and then view the other parts of it. This drag-and-drop motion panorama is called panning, as the process of viewing other parts. The difference between the swipe
;! function () {} (); ;! What's the use?From the syntax, the semicolon in JavaScript indicates the end of the statement, and at the beginning, it may be used for compression and other methods to split, indicating a new statement begins. So, if in a separate JS file, the beginning of the semicolon is meaningless, can be deleted.An exclamation point is a logical operator, a "non", a common use of the IF (!true) {}, whereas the operator is preceded by the function definition as a whole, then the fu
HTTP protocol common standard status code meaning
Status Code
meaning
Notes
200
The request is complete
2XX status codes are returned as normal status codes.
300
Multiple options
The server can perform a variety of actions depending on the request. The server can select an action based on the requestor (u
has a relaxing effect on the nervous system, and according to some studies, a blue background can also increase productivity. However, if your product is related to food, do not use blue as the background color, because the blue will inhibit people's appetite oh. The symbolic meaning of the color symbol is sometimes related to things in nature. For example, the color of the sky and the sun produced by Lenovo World-connected. However, most color mea
For you to trade cat software users to detailed analysis to share the meaning of the voucher.
Analytical sharing:
A voucher is a marketing tool for dealing with a cat's platform, a trading partner with a voucher, when purchasing a specified product, the corresponding denomination of the voucher can be used to deduct cash payments. Voucher can be used in the validity period, can check my voucher in the personal center.
The buyer used a voucher
With the development of the SEO industry, a variety of SEO as the carrier of the career will be derived from, SEO optimization, seo diagnosis, SEO consultants, SEO station editor, SEO outside the chain Commissioner, and so on, a large number of derivative occupations are also reflected in the SEO industry for talent needs, Usually if a person can master all of these skills can be independent survival, self-development, today I want to talk about the meaning
Tags: max ISS ror span post img In addition to debug echoLinux Shell Bash with special meaning exit code purpose descriptionThe exit command exits the current shell and can terminate the current script execution in a shell script.Common parametersFormat: Exit nExit. Set the exit code to N. (cause the Shell to exit with a status of N.)Format: ExitExit. The exit code is unchanged, which is the exit code for the last command. (If n is omitted, the exit s
Shell_05 variable name, meaning variable name meaning $ n the nth domain of the current record, number of ARGC command line parameters for all fields recorded by FS $0 in the ARGIND command line (start with 0) array of ARGV command line parameters CONVFMT digital conversion format ENV... shell_05 variable name, meaning variable name
What is the true meaning of "I want to learn programming "?
There are two important things about programming education:1. most people do not really want to learn code.2. learning code is not just about writing code.What-people-really-mean-when-they-say-I-want-to-learn-to-codeIf you do not know the above two things, the way you learn code is wrong, and you will never learn to write code.The first point is that if you do not really want to lear
To tell the truth, "div+css" This word does not know how many people harm, perhaps the intention of its proposed is not wrong, but the followers from the performance of the distorted meaning, that the entire page should be a combination of div+css files. In this way, there is no visual impact, because the previous design of the page is restored, but if the HTML document to the machine (such as spiders) to analyze, it may not be able to find the focus,
A few days ago a friend in the group asked Clear:left meaning, I thought is simple to clear the floating problem, let him Baidu "clear floating", leading to a little misunderstanding in the middle. Later I followed his demo and found that I did not fully understand the meaning of clear:left and clear:right. Special Read the following manual, and wrote a few demos, after the group of other people to guide, s
A friend of the introductory series of C + + programming that has seen chicken peck rice should be able to notice that in many instances there is such a statement: using namespace STD, which uses the namespace STD, The function is to stipulate that the standard library functions used in the file are defined in the standard namespace Std. This article explains the meaning and usage of namespaces in detail.the meani
Thoughts on the meaning of lifeThe famous psychologist Frankel was a marvel of the 20th century. During the Nazi period, as a Jew, his family was imprisoned in Auschwitz, his parents, his wife, his brother, all died in the gas chamber, only he and his sister survived. Frankel not only beyond this purgatory pain, but also his experience and academic integration, creating the meaning of Liao law, for people t
The difference and meaning of/i,/g,/ig,/gi,/m in regular expressions, Iggi
The difference and meaning of/i,/g,/ig,/gi,/m in regular expressions
/I (Ignore case)/g (full-text lookup occurrences of all matching characters)/m (Multi-line lookup)/gi (full-text lookup, ignore case)/ig (full-text lookup, ignore case)
http://www.bkjia.com/PHPjc/1077539.html www.bkjia.com true http://www.bkjia.com/PHPjc/10
"Statement" The content of this post is copy, the source is the stack overflow.It has several meanings in Scala and all related to its mathematical meaning as implication.
In a value, it introduces a function literal, or lambda. e.g. the bit inside the curly braces inList(1,2,3).map { (x: Int) => x * 2 }
In a type, with symbols on both sides of the arrow (e.g. a = t , (b) + t , (a,b,c) = + T , etc.) It's sugar for function, that's, A Funct
An error occurred while reading a regular expression on the webpage. Let's take a look at the error. It is best to explain the meaning of each symbol. I am learning an example of a regular expression on the webpage, and an error has occurred. Let's take a look at the error. It is best to explain the meaning of each symbol. the div tag is being extracted and the content with the ID of PostContent is stored i
The meaning of the DiscuzX-custom function lies in getgpc () in function_core.php. what is the meaning of this function? Why use this function to obtain form parameters? Thank you ------ solution ------------------ In my opinion, it is mainly convenient to get variables that may be uncertain for get or post! Because $ _ REQUEST is not good ------ solution -------------- DiscuzX-
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