abcd dot com

Basic knowledge CharacterPOSIX Extended Regular Expression functionsPerl-compatible Regular expression functionsFrom the message verification. The format of the message: Tenssun@163.com Where Tenssun is the user name, 163.com is the server name

One: Grammar rulesThe 1.RegExp constructor creates a regular expression object that matches the text to a pattern .2.REGEXP is made up of two parts①pattern（正则表达式的文本）　　② flags（　　　　g:Global match; Find all matches, not stop after first

The delimiters and metacharacters in the regular expression:   Metacharacter is a special character that can represent a character or a type of character. a qualifier is the number of times a character appears.   Special characters

Base color --- Glossary For a long time, we have been asking about the base quality. Looking at the inspection machine steps of the base, we can see the concept of base quality. The following are our views on the base quality control, on behalf of

1)Match multiple regular expressions with pipe symbol (|)Exampleat | Home match at, home2)Match any single character (.)ExampleF.O matches any character in the middle of "F" and "o", such as FAO, F9O, F#O, etc.3)Match from beginning or end of

Regular expression rulesCharacter Description:\: Marks the next character as a special character or literal. For example, "n" matches the character "n"."\ n" matches the line break. The sequence "\" matches "" \ ("and" ("matches").^: matches the

Overview of DOSDOS (disk operating system) is a widely used disk operating system, even the current popular windows9x/me system is based on it.There are two common DOS types: IBM's Pc-dos and Microsoft's MS-DOS, which have the same functional,