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catalogue preface 1, Definition and characteristics of stack? 2, Implementation of stack 2.1 sequence stack 2.1.1 structure definition of sequence stack 2.1.2 initialization of sequence stack 2.1.3 judge whether the stack is empty or full 2.1.4 stacking 2.1.5 out of stack 2.1.6 preview stack top elements 2.2 chain stack 2.2.1 struct ...

1,toRaw Returns a proxy object wrapped in reactive or readonly In fact, it is to convert a proxy object into an ordinary object <template> <div> </div> </template> <script> import {ref,reactive,toRaw,readonly,shallowReactive,shallowReadonly,toRefs} from 'vue' export default { name: 'App', setup (props ...

This article learned from Dataware SQL tutorial SELECT & WHERE SELECT: SELECT the necessary data from the table Query: the process of matching query / query and selecting necessary data through SELECT SELECT "Field name" FROM "Table name"; WHERE: selectively extract necessary data SELECT "Field name" FROM "Table name" WHERE "condit ...

1, What is an object pool Object pool is simply a software design idea that provides reusable ability for objects. We often say that it is not difficult to borrow and return, and the object pool ensures that objects can be reused through borrowing and returning, so as to save the performance overhead of frequent object creation. The most commo ...

1. Introduction The tput command initializes and operates your terminal session through the terminfo database. Using tput, you can change several terminal functions, such as moving or changing the cursor, changing text properties, and clearing specific areas of the terminal screen. Like most commands in UNIX, the tput command can be used ...

Absrtact: it is inevitable to record sensitive operations in business systems, which can be realized by hard coding or simple annotation, but they are not elegant enough. Today, I share a log tool written by myself. This is a logging tool implemented with reference to an article by meituan. It can record operation logs flexibly and has good ...

Catalogue of series articles Preorder traversal: Root - > left - > right Middle order traversal: left - > root - > right Post order traversal: left - > right - > root 1, Middle order, pre order and post order traversal Middle order traversal of binary tree: traverse the tree by accessing the left subtree - root nod ...

1. Delete folders and files rm command Permission: all users can use rm command to delete directories on the terminal. Format: rm [option] DirName Description of rm command options The [options] in the command generally include the following: -i #Ask for confirmation one by one before deleting. -f #Even if the original file attribute ...

SpringMVC 1, Introduction to spring MVC 1. What is spring MVC? The framework Spring MVC framework developed on the basis of Spring is the controller framework C-layer framework (struts 2 is also the C-layer framework) Essence: replace the struts 2 framework as a controller In order to enable Spring to plug into MVC architecture, Spring fra ...

catalogue 1. Composition of JavaScript 1. Three cores 2. Common methods of window objects 2.if selection structure 3. Multiple if selection structure 4. Nested if selection structure 5.switch selection structure 6. Ternary expression 1. Composition of JavaScript 1. Three cores ESMAScript core syntax (Standard Specification) - > ...