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"Meta-table"The keys in the meta-table are events (event), which are called meta-Methods (Metamethod).The meta table of the table is replaced by the function setmetatable by querying the getmetatable of any value through the function.Setmetatable (for table only) and getmetatable (for any object)Syntax: setmetatable (t

The meta table provided in LUA is a personalized behavior that helps LUA data variables complete some of the predefined features, such as the addition of two tables. Assuming both A and B are tables, you can define how expression a+b is evaluated by using the meta table. When Lua tries to add two tables, it checks whether one of them has a meta table and then che

HTML meta-SummaryMeta tag composition: Meta tags have two attributes, which are the Http-equiv property and the Name property, and different properties have different parameter values, these different parameter values to achieve a different page function.1. Name propertyThe name attribute is mainly used to describe the Web page, and its corresponding property value is content,content content is mainly conve

This article is mainly about the three elements of the HTML META tag, is the three attributes of the composition and use of the introduction, there are many more important attribute values, in the page is very useful, and now let us look at this article First we need to know what the three elements of the META tag are? 1. Required attribute: Content property. This property is intended to define

Describes how vue-meta allows you to manage header tags more elegantly, and describes vue-meta In the Vue SPA application, if you want to modify the HTML header tag, you may directly do this in the Code: // Change titledocument. title = 'What? '// Introduce a piece of scriptlet s = document. createElement ('script') s. setAttribute ('src ','. /vconsole. js') document. head. appendChild (s) // modify

Meta Tags for mobile platforms ----- Amazing effects, platform meta tags ----- I am not familiar with the meta tag in the web layout of the desktop platform. It will always be inside the head element. Do you have special feelings for SEO friends about meta, today we will talk about the

Even if your personal website is wonderful, it is difficult to find people in the "vast ocean" network space. How to promote your personal website, the methods that people first think of are similar to the following: ● Log on to your personal website in the search engine ● Add a link to your personal website on a well-known website ● Post in the Forum to promote your personal website Many people ignore the powerful functions of HTML Tag meta. A Good

Role of meta tags in mobile web development; Role of meta tags in web Development Today, I encountered a problem when trying to move the page. You can also find other Format-detection: "format detection". As its name suggests, it is used to detect some formats in html, the format-detection attribute of meta mainly includes the following settings:

Use of meta tags on mobile platforms and platform meta I. meta Tags are divided into two parts: HTTP header information (http-equiv) and page description information (name ). 1. Content-Type value of the http-equiv attribute (display character set setting) Note: Set the character set used on the page to describe the text language used by the homepage. the browser

The first time you see these two things, you may find it very esoteric, but in fact it is very well understood, although it may actually be really esoteric. (Jor: Stop!) Roll thick. ）1. Know why 1 + 1 = 2?Why is it equal to 2 in Lua? (Jor: Is it not equal to 2 other places other than Lua?) ）Why do numbers and numbers add up to be legal, and why does table and table add up to an error? Have you ever thought about these questions?Yes, the rules, it's all just rules, LUA specifies that numbers can

(Transferred from: http://blog.csdn.net/aladdina/article/details/5496891)The QT meta-object system is based on the following three things: Class: Qobject provides a base class for all objects that need to take advantage of the original object system. Macros: Q_object, which can typically be declared in a private segment of a class, allows the class to use the attributes of a meta-object object,

A meta-table can be used to modify the behavior of a value so that it performs a specified action when confronted with a non-predefined operation. When Lua tries to add two tables, it checks whether one of the two has a meta-table, and then checks if there is a field called __add in the original table. LUA does not create a meta table when it creates a new table,

‘‘‘# str, type, and LineItem are subclasses of Object str, object, and LineItem are instances of type, because they are all classesThe relationship between the object class and the type class is unique: object is an instance of type, and typeis a subclass of object. This relationship is "magical" and cannot be expressed in Python code because it defines one of theOne must exist before the other. Type is an instance of itself and that's amazing.>>> ' spam '. __class__>>> str.__class__>>> from BUL

IntroductionHere is a detailed description of meta functions and usage.ObjectiveMeta is an accessible tag in the head area of the HTML language. Maybe you think the code is dispensable. In fact, if you can use good meta tags, will bring you unexpected effects, meta tags have the role of: Search engine Optimization (SEO), define the language of the page, automatic

Meta tag details (meta tag function) Many people ignore the powerful effect of HTML tag meta, a good meta tag design can greatly improve the likelihood of your personal site being searched, interested, who am I to re-recognize the META tag it?Your personal website even if do