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Java Script   正则表达式 张军
使用方法 ,[object Object],[object Object],[object Object],[object Object]
修饰符 ,[object Object],[object Object],[object Object],var str = "taobao UED"; var test = /ued/i;  // var test = new RegExp("ued", "i"); alert(str.match(test));
RegExp 属性 ,[object Object],[object Object],[object Object],[object Object],[object Object]
lastIndex ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],//true //4 //false //0 //true //2 一个正则表达式实例多次 test 或 exec 时,它的 lastIndex 将每一次都被更改。 不具有标志  g  和不表示全局模式的  RegExp  对象不能使用  lastIndex  属性
常用元字符 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RegExp 方法 ,[object Object],[object Object],[object Object]
Exec 的使用 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],//UED //10 //UED //29 exec() 返回一个数组,其中存放匹配的结果。如果未找到匹配,则返回值为  null 。
支 RegExp 的  String  对象的方法 ,[object Object],[object Object],[object Object],[object Object]
Match 的使用 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
限定符 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
如何 匹配元字符 ? ,[object Object],[object Object],[object Object],[object Object],[object Object]
控制文本框输入价格 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
贪婪与非贪婪限定符 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
贪婪与非贪婪的匹配过程 ,[object Object],[object Object],[object Object],[object Object],[object Object],// 非贪婪匹配 从第一个字符开始匹配 如果失败,读入下一个字符继续 http:/, /, www/, hello/ // 贪婪匹配 匹配整个字符串 从后逐一舍去最后一个字符继续 http://www/hello/
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JavaScript Regular Expressions