Using regular expressions in js

  When we design web pages, we always deal with forms, and most of the verification of forms is verified by regular expressions. On the homepage, let's learn what regular expressions are: (the figure above comes from Baidu Encyclopedia) regular expression_ Baidu Encyclopedia   Next, let's learn about the use of regular expressio ...

Posted on Tue, 30 Nov 2021 16:53:31 -0500 by eddjc

Apache ShardingSphere 5.0.0 kernel optimization and upgrade Guide

After nearly two years of optimization and polishing, Apache shardingsphere version 5.0.0 GA was finally officially released this month. Compared with version 4.1.1 GA, version 5.0.0 GA has been greatly optimized at the kernel level. Firstly, the kernel is completely transformed based on the pluggable architecture, and various functions in the ...

Posted on Fri, 26 Nov 2021 07:33:11 -0500 by OOP

java regular expression source code analysis

java regular expression source code analysis public class Demo { public static void main(String[] args) { String content = "2000 In May, JDK1.3,JDK1.4 and J2SE1.3 It was released one after another, and a few weeks later it won Apple company Mac OS X Support for industry standards. On 24 September 2001, J2EE1.3 release." + ...

Posted on Tue, 23 Nov 2021 08:51:04 -0500 by b2k

Front end day 6 array / function / common built-in object / pre parsing / object / error

1. Array 1. Why learn arrays For the previously learned data type, only one value can be stored (for example, Number/String). If we want to store the names of all students in the class, how should we store them? 2. Definition of array The so-called array is to arrange multiple elements (usually of the same type) in a set in a certain order ...

Posted on Thu, 18 Nov 2021 08:51:40 -0500 by bolter

Linux text manipulation awk

AWK Difference between AWK and sed: AWK is more like a scripting languageAWK is used for text processing of "comparison specification" and for counting quantity and outputting specified fieldsUse sed to process non-standard text into "more standard" text Process control of AWK script Routine BEGIN {}Main input loop {} (u ...

Posted on Fri, 22 Oct 2021 02:06:21 -0400 by MacGod

Chapter 5 grep and regular expression of three swordsmen in Linux text processing

3. Text processing three swordsmen The grep command mainly filters the (regular expression) lines of text based on patternssed: stream editor, text editing toolawk: implementation gawk on Linux, text report generator 3.1 grep of three swordsmen in text processing grep: Global search REgular expression and Print out the line Function: a text ...

Posted on Thu, 14 Oct 2021 19:50:43 -0400 by Neotropic

Attack and defense world -- Web advanced -- Web_ php_ Deserialize -- deserialize -- regular expression -- wakeup -- bypass -- base64 encryption

catalogue Train of thought analysis payload Bypass preg_match Bypass__ wakeup   Get the flag Pay attention to the details     A web advanced problem from the attack and defense world is called Web_php_unserialize The title gives a php code, which should be part of the background source code: <?php class Demo { ...

Posted on Sun, 10 Oct 2021 05:14:56 -0400 by shah

October 7, 2021 - Interpreter mode for design mode

Chapter 21: Interpreter Mode 1. Introduction to Modes 1) Compilation principle: an arithmetic expression forms lexical units through lexical parsers, which then construct a grammar analysis tree through a grammar parser, resulting in an abstract grammar analysis tree. Lexical parsers and grammar parsers can both be considered interpreters. 2 ...

Posted on Thu, 07 Oct 2021 13:00:34 -0400 by ledtear

shell script learning

12, Regular expression 1. Introduction to regular expressions Regular expressions are a form of text pattern matching, including ordinary characters (for example, letters between a and z) and special characters (called "metacharacters"). It is a pattern of string matching, which can be used to check whether a string contains a subst ...

Posted on Tue, 28 Sep 2021 06:47:08 -0400 by rross46

Regular expression and text editor of sheI script

catalogue 3, sed tool introduction 1. Sed workflow 2. sed basic syntax 3. Practical application (1) output the specified line (2) insert qualified lines (3) delete qualified lines (4) replace the qualified text (5) transfer qualified text (6) execute multiple commands           (7) edit the file with script ...

Posted on Tue, 21 Sep 2021 19:55:48 -0400 by rajns