Course Intermediate  4700

Course Introduction：There are two main purposes for studying this course: 1. Visual panel layout adapts to the screen 2. Use ECharts to realize histogram display Core Technology: -Based on flexible.js + rem smart large screen adaptation - VScode cssrem plug-in - Flex layout - Less to use - Based on ECharts data visualization display - ECharts histogram data settings - ECharts map introduction

Course Elementary  20984

Course Introduction：Use PDO mode (PHP data object) to connect and select databases (unified operation of various databases), execute SQL statements and process result sets

Course Intermediate  8359

Course Introduction：Many programmers who have worked for many years still have a very basic understanding of databases. They are confused as soon as they go out for interviews. They don’t understand basic SQL statements, more complex SQL queries, and SQL statement optimization. They don’t even know how to use them. Redis improves system performance and can withstand tens of millions of concurrencies. This set of courses will help you thoroughly understand MySQL locks, execution plans, indexes, MVCC & Redis transactions, cache, breakdown, penetration, avalanche, warm-up, etc., and you can complete all database interviews in one set!

Course Elementary  48281

Course Introduction：A time query calendar made by native PHP (with lunisolar time conversion function)

Course Advanced  10880

Course Introduction：SSDB is a high-performance NoSQL database developed in C/C++ language. It supports KV, list, map(hash), zset(sorted set), qlist(queue) and other data structures. It is used to replace or cooperate with Redis to store billion-level lists. The data.SSDB is stable, used in production environments, and has been used in many Internet companies_From the SSDB Database User Manual

Course Introduction：Golang is a modern and powerful programming language popular for its efficient processing capabilities and cross-platform support. Golang has many built-in data types, but in the actual development process, we often need to perform data type conversion in order to better operate data. This article will focus on data conversion in Golang. 1. Introduction Data conversion in Golang refers to converting the value of one data type into the value of another data type. For example, convert a string to an integer. Data type conversion supported in Golang

2023-05-27 comment 0  641

Course Introduction：As data analysis becomes more and more important, data transformation and cleaning become more and more necessary. In the process of data analysis, we usually need to convert data from different formats and sources into the format we need. Among them, MySQL is a popular relational database management system today. This article will introduce how to use MySQL for data transformation. 1. MySQL data types Before performing data conversion, we need to understand the MySQL data types in order to convert the data types correctly. The following are the main data types supported by MySQL

2023-05-20 comment 0  1534

Course Introduction：PHP data type conversion is a forced conversion. The PHP data types that are allowed to be converted are: • (int), (integer): converted to integer • (float), (double), (real): converted to floating point type • (string ): Convert to string • (bool), (boolean): Convert to Boolean type • (array): Convert to array • (object): Convert to object PHP data types have three conversion methods: • Before the variable to be converted plus the goals enclosed in parentheses...

2016-11-11 comment 0  1288

Course Introduction：With the continuous upgrading of databases, data conversion has become a key part of data migration, data integration, data analysis and other work processes. Among them, MySQL database is a very widely used database. This article will discuss MySQL data conversion and related tools and technologies. 1. MySQL data types Before converting MySQL data, we first need to understand the MySQL data types. The data types supported by MySQL include numeric, date and time, string, binary, etc. 1. Numerical value

2023-05-18 comment 0  2738

Course Introduction：Data type conversion in JavaScript is an important topic because during the development process, it is inevitable to convert one type of data into another type of data. In JavaScript, there are three types of data conversion: cast, automatic type conversion, and explicit type conversion. In this article, we will discuss these three types of conversions and how to use them in your code. Casting Casting in JavaScript, also known as explicit type conversion, is the conversion of one data type to another data type,

2023-05-17 comment 0  511