In-depth rich text editor

Editor introduction Common rich text editors can be divided into two categories, which are implemented by textarea and contenteditable. textarea The structure is simple and easy to use. Some text formats and complex styles are difficult to implement. It is recommended to be used only in scenarios with low editing requirements. contenteditab ...

Posted by jcornett on Mon, 19 Sep 2022 21:14:08 +0300

R language - data structures

Dataset Concept Different industries call the rows and columns of a dataset differently. Statisticians call them observation s and variable s, database analysts call them record s and field s, and researchers in data mining and machine learning disciplines call them example s ) and attribute s. data structure R has many object types for stor ...

Posted by harishkumar09 on Sat, 17 Sep 2022 21:36:31 +0300

Borrowing where variables exist, shepherds laugh with pointers, go lang 1.18 introductory refined tutorial, from Bai Ding to Hongru, go lang type pointer (Pointer) using EP05

What does the pointer mean? A pointer is a variable that stores the address of another variable in memory. A variable is a convenient placeholder for referencing a computer's memory address. A pointer variable can point to the memory address of any value and it can point to the memory address of that value. By analogy, the pointer is the c ...

Posted by ccb on Fri, 16 Sep 2022 21:52:50 +0300

Web-based meal ordering system for epidemic isolation zones

1. Project introduction The purpose of this project is to use the trend of Internet development and related web application development technology to improve the vitality and vitality of the catering industry, while contributing their own ideas and technologies to the epidemic. As we all know, when the new crown epidemic spread by foam lea ...

Posted by witold on Wed, 14 Sep 2022 21:01:42 +0300

Java - what is thread

​ ​ Event address: CSDN 21 Day Learning Challenge 1. What is a thread To understand what a thread is, you must first understand a process Process: A simple understanding is the running program Thread: A thread is the smallest unit in a process, and there is at least one thread in a process There is no concept of a process in the ...

Posted by rajmohan on Mon, 12 Sep 2022 21:15:45 +0300

Network management related commands

1. Command netstat to display information such as local network connection, running port and routing table netstat command: used to display various network related information, such as network connection, routing table, interface status, dead link, multicast membership, etc. options -a : list all network connections in the system -t : List ...

Posted by Spitfire on Mon, 12 Sep 2022 21:01:50 +0300

Basic data types for the golang learning notes series

Basic data types In the go language, data types are used to declare functions and variables. Data types appear to divide data into data of different memory sizes. When programming, large data is needed to apply for large memory. When small data is needed, small memory is needed to make full use of space. The go language has the following dat ...

Posted by ezekiel on Sun, 11 Sep 2022 21:28:26 +0300

Build Android common layout interface

1. Experimental tasks (1) Mastering writing layouts in XML files and Java code (2) Mastering common layouts: relative layout, linear layout, frame layout and table layout 2. Experiment content 1. Write layouts in XML files and in Java code 2. Build a common layout (1) Relative layout (2) Linear layout (3) Frame layout (4) Table layout ...

Posted by fareasd on Sat, 10 Sep 2022 23:03:12 +0300

Notes on the fourth day of basic JavaScript

JavaScript Basics - day 4 notes Understand the meaning of encapsulation, be able to realize logical encapsulation through the declaration of functions, know the characteristics of object data types, and realize simple calculation functions in combination with mathematical objects. Understand the characteristics of function encapsulationM ...

Posted by rem on Thu, 08 Sep 2022 21:32:14 +0300

Derivation of C++ decltype type

decltype specifier (C++11) C++11 introduces a decltype specifier, which can obtain the type of an object or expression. It is also easy to use: #include <iostream> int main() { int x1 = 0; decltype(x1) x2 = 0; // x2 is derived as int type (type of variable x1) std::cout << typeid(x2).name() << s ...

Posted by bimbo on Wed, 07 Sep 2022 22:08:45 +0300