1 Function to find the length of a string 1.1 strlen function 1.1.1 Introduction to strlen function 1. The string has ‘\0’ as the end mark, and the strlen function returns the number of characters that appear before ‘\0’ in the string (excluding ‘\0’). 2. The string pointed to by the parameter must end with […]
Tag: character
What are the main features of javascript? What are the characteristics of javascript?
Hello everyone, let me share with you what are the basic characteristics of javascript. Many people still don’t know this. Let’s explain it in detail below. Now let’s take a look! Introduction to JavaScript Let’s talk about JavaScript, what you can do with it, what features it has, and some technologies used with it. What […]
[Character set issues when migrating ORACLE data to MogDB/openGauss]
1. Problem Overview When the ORACLE database stores data, there is sometimes a phenomenon that the data in a table contains both UTF8 characters and GBK characters, and there may also be garbled data. NLS_CHARACTERSET is the database character set, NLS_NCHAR_CHARACTERSET is the national character set, and NLS_LANG is an environment variable of the Oracle […]
The basic structure of javascript script, the characteristics of javascript script language
This article will talk about the difference between javascript scripting language and java language, and what parts does javascript script consist of? I hope it will be helpful to you, don’t forget to bookmark this site. Table of Contents Introduction to JavaScript 1.1 JavaScript composition 1.1.1 ECMAScript 1.1.2 Document Object Model DOM 1.2.3 Browser Object […]
linux driver – character device driver
Article directory Character device driver Character device APP Module operation Module installation Create device node APP operation module Uninstall and delete modules `shell` script automation linux driver – character device driver Linux driver – character device driver (automatically generates device node files) Linux driver – compile the module into the kernel Character device driver #include […]
emoji alignment special character alignment text alignment
How to align emoji, how to align special characters, advanced text alignment Question elicitation When we print out the program, if the characters we output contain emoji text or other special character text, our print alignment effect will be misaligned. The following code reproduces this effect (tips: Teacher Ma, the | symbol in front is […]
“01” tick “Morse Code” encryption and decryption of single characters
“01” replaces the tick “.-” “Morse code” characters to encrypt and decrypt a single character entered on the keyboard. (This note is suitable for coders who are familiar with loops and lists) [The details of learning are a joyful process] Python official website: python cutting edge. Unfortunately it’s the original English version. So, I want […]
Characteristics of tun/tap and veth devices of Linux virtual network devices
In the current cloud era, virtual machines and containers are everywhere, and the network management behind them is inseparable from virtual network devices. Therefore, understanding virtual network devices will help us better understand the network structure in the cloud era. Starting from this article, we will introduce virtual network devices under Linux. The difference between […]
MySQL traverses all fields of all tables to find character data
MySQL traverses all fields of all tables to find character data There are some data searches at work, but it is not clear which field in which library, which table, especially sensitive character search. If the amount of data is not large, we can solve the problem by traversing the entire library and characters in […]
Solution to LIKE special character processing in Mybatis
In MYSQL, when using the LIKE keyword for fuzzy matching, special characters need to be escaped, as follows: \ is escaped into \, _ is escaped into \_, and % is escaped into \%. In mybatis and mybatis-plus, there is no relevant method to automatically escape. In fact, this is logical. Things like escaping should […]