m2m meaning

# "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