This time, understand Promise thoroughly
1, Why introduce Promise
Before introducing this chapter, first raise a few questions:
What problem did Promise solve?What are the specific usage scenarios for Promise?
What problem did Promise solve?
Callback hell problem
Before Promise, the front end often needs to solve the asynchronous problem by nesting callback functions laye ...
Posted by tomms on Wed, 02 Mar 2022 06:33:21 +0100
How rabbimq ensures data security
I Persistence
RabbitMQ supports message persistence, that is, data is written on disk. (1) exchange persistence, specifying durable = > 1 when declaring (2) queue persistence, specifying durable = > 1 when declaring (3) Message persistence, specifying delivery when delivering_ Mode = > 2 (1 is non persistent) Note: if the message is p ...
Posted by kraadde on Wed, 02 Mar 2022 06:26:09 +0100
Three.js series: write a first / third person perspective game
Hello, everyone. I'm Qiufeng. I'm here Last I talked about three The goal of JS series and Baoke dream game, let's pass three JS to talk about the perspective following in the game. Believe me, readers play more or less games, such as king glory, Jedi survival, baokemeng, Zelda, protogod and so on. So do you know what perspective they are? Do y ...
Posted by phlow on Wed, 02 Mar 2022 06:22:55 +0100
Use vue to jump between registration page, login page and home page and maintain login status [complete code]
Article catalogue
preface1, Simple implementation of page
1. Login page2. Registration page3. Home page (display personal information) 2, Logical implementation
1. Use of localstorage2. Function realization
Sign inregisterhomepageRouting profile summary
preface
This article mainly explains how to use vue to realize the j ...
Posted by PHPHorizons on Wed, 02 Mar 2022 06:18:38 +0100
What is the difference between deep copy and shallow copy? How to implement a deep copy?
1, Data type storage
As mentioned in the previous article, there are two major data types in JavaScript:
Basic typereference type The basic type data is saved in stack memory The reference type data is stored in the heap memory. The variable of the reference data type is a reference to the actual object in the heap memory, which is stored ...
Posted by sBForum on Wed, 02 Mar 2022 05:56:26 +0100
Introduction to PHP
Foundation (unimportant)contentPHP environment installationVariables and constantsCommon operatorsConditional branch statementCircular statementarrayfunctionDatabase operationWhat is PHP?PHP ("PHP: Hypertext Preprocessor", acronym for hypertext preprocessor) is a widely used open source multi-purpose scripting language, which can be e ...
Posted by fallen00sniper on Wed, 02 Mar 2022 05:46:28 +0100
K8s of automated operation and maintenance - Kubernetes cluster deployment, pod, service micro service, k8s network communication
catalogue
1, Introduction to Kubernetes
1. Introduction to Kubernetes
2. kubernetes design architecture
3. Kubernetes core components
4. kubernetes design structure
2, Kubernetes deployment
1. Official documents:
2. Install Kubernetes using the deployment tool kubedm
3. Installing flannel network components
4. Other nodes access k8s c ...
Posted by ridgedale on Wed, 02 Mar 2022 05:42:35 +0100
[SRM neuron model] Analyze SRM neurons with code
Before parsing the code, let's now look at the SRM model. The first function represents the shape a spike should have. Where tf is the time of the last pulse. In the second function, Iext describes the effect of all presynaptic pulse times on membrane potential. The third function should be well understood, which is the voltage of a resting po ...
Posted by gukii on Wed, 02 Mar 2022 05:39:07 +0100
html5 tag learning notes
HTML syntax specification
@Double label
@@Start and end labels:
<html></html>
@Single label @@There is only one label:
<br /> //There is a space
@Inclusion relation
@@Nested tags in Tags:
<head>
<title></title>
</head>
Belonging to parent-child relationship
@Juxtaposition relationship:
< ...
Posted by squimmy on Wed, 02 Mar 2022 05:38:45 +0100
Linux resource control [notes]
Linux resource control
I Resource isolation
What is a Namespace?
namespace is a method used by the Linux kernel to isolate kernel resources.
It is the encapsulation and isolation of global system resources, Processes in different namespace s have independent global system resources, Changing the system resources in a namespace will only ...
Posted by jbalanski on Wed, 02 Mar 2022 05:27:47 +0100