正则表达式笔记。

1. CHAPTER 10
Pattern Matching with
Regular Expressions
2011-04-11 dale
Javascript正则表达式

2. 1. Definition
• RegExp objects
– var pattern = /s$/;
– var pattern = new RegExp(); // use constructor
Js Reg Perl Reg

3. 10.1.1 Literal Characters
• Character Matches字母
• Alphanumeric数字
• Character字符
• 0 The NUL character (u0000
• t Tab (u0009)
• n Newline (u000A)
• v Vertical tab (u000B)
• f Form feed (u000C) 换页
• r
• x
• u
• c

4. Special Character
• ^$.*+?=!:|/()[]{}

5. 10.1.2 Character Classes
• /[abc]/
• /[a-z]/
• /[a-zA-Z0-9]/ // Latin alphabet

6. 10.1.3 Repetition（repeat）
• /dd/ //匹配2位数字
• /dddd/ //匹配4位数字

7. • /(*‘”+)*^‘””+*1/ // ‘你好’ //“hello”

8. 实例
var reg = /[a-zA-Z_]{6,9}/g;
Var myString="guoguqoo0000_";
reg.test(MyString);

9. String类与regular
• myString.match(reg)
• myString.replace(reg,$n)
• myString.search(re) //-1 intIndex
• myString.split(reg[,5]) //分割返回前5个

10. • /b^[a-z]w{5,7}b/