The Object constructor creates an object wrapper. Methods of the Object constructor
Object.assign() -Object.assign(target, ...sources)
Copies the values of all enumerable own properties from one or more source objects to a target object.
Variable Declarations
Let
1. The `let` statement declares a block scope local variable, optionally initializing it to a value.
2. Redeclaring the same variable within the same function or block scope raises a `SyntaxError`.
简单粗暴添加文章阅读统计
精细化添加文章阅读统计统计
Package 改造添加文章阅读统计
关系代数
LeetCode Practice
关系代数是一种过程话查询语言，它包含一个运算的集合，这些运算以一个后两个关系为输入，产生一个新的关系作为结果，关系代数的基本运算有：选择，投影，并，集合差，笛卡尔积，更名，集合交，自然连接，赋值
Class, Method, Variable, Scope
Inherit Encapsulation 封装 polymorphism 多态
组合与关系
XML is a software- and hardware-independent tool for storing and transporting data.
XML Does Not Use Predefined Tags
XML Tree
Create Directory Include
Dockerfile
Nginx File
Vue Practice
Axios
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<h3 class="text-center" >Vue News</h3>
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<option v-for="section in sections " :value="section" v-text="section"></option>
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Article Point
Reference
For photos and other raster images, the techniques you use might vary a bit, depending on if the images are loaded through CSS or HTML.
PDOStatement::fetchAll() returns an array that consists of all the rows returned by the query. From this fact we can make two conclusions:
This function should not be used, if many rows has been selected. In such a case conventional while loop ave to be used, fetching rows one by one instead of getting them all into array at once. "Many" means more than it is suitable to be shown on the average web page.
This function is mostly useful in a modern web application that never outputs data right away during fetching, but rather passes it to template.