


js gets time and converts between string and timestamp_javascript skills
Stop talking nonsense and get straight to the code
//Get the current time:
var myDate = new Date();//Current time
var year = myDate.getFullYear();//Current year
var month = myDate.getMonth() 1;//Current month
var day = myDate.getDate();//Current day
myDate.getYear(); //Get the current year (2 digits)
MyDate.getFullYear(); //Get the complete year (4 digits, 1970-????)
myDate.getMonth(); //Get the current month (0-11, 0 represents January)
myDate.getDate(); //Get the current day (1-31)
myDate.getDay(); //Get the current week X (0-6, 0 represents Sunday)
MyDate.getTime(); //Get the current time (the number of milliseconds since 1970.1.1)
myDate.getHours(); //Get the current hours (0-23)
MyDate.getMinutes(); //Get the current minutes (0-59)
MyDate.getSeconds(); //Get the current seconds (0-59)
MyDate.getMilliseconds(); //Get the current number of milliseconds (0-999)
MyDate.toLocaleDateString(); //Get the current date
var mytime=myDate.toLocaleTimeString(); //Get the current time
myDate.toLocaleString(); //Get date and time
var oneDay = 1000 * 60 * 60 * 24;
//Get the date of the latest week
var lastDate = new Date(myDate - oneDay * 6);
var lastYear = lastDate.getFullYear();
var lastMonth = lastDate.getMonth() 1;
var lastDay = lastDate.getDate();
//Get the last day of the current month
var day = new Date(year ,month , 0);
var lastdate = day.getDate();//The last day of the current month
//Get the date of the last N months
var lastDate = new Date(myDate - oneDay * myDate.getDate());
lastDate = new Date(lastDate - N * oneDay * (lastDate.getDate() - 1));
var lastYear = lastDate.getFullYear();
var lastMonth = lastDate.getMonth() 1;
var lastDay = lastDate.getDate();
//Convert string to timestamp
var date="2014-12-06";
date = new Date(Date.parse(date.replace(/-/g, "/")));
date = date.getTime();

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 English version
Recommended: Win version, supports code prompts!

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 Linux new version
SublimeText3 Linux latest version