Javascript正则表达式

JS正则

    test    -判断字符串是否符合规定的正则
    例：
        var rep = /d+/ 注:javascript正则表达式格式为/../
        rep.test("dfafadfadf552dfdafds")结果为true
    exec    -获取匹配的数据
        rep = /d+/
        str = "jsafkajf27fdf56"
        rep.exec(str)结果为27

        var str = "JavaScript is more fun than others"
        var pattern = /Java(w+)/;
        pattern.exec(str)结果为["JavaScript","Script"]

        var str = "JavaScript is Java fun than Javaweb"
        var pattern = /Java(w+)/g;加上字母g表示全局匹配(/../匹配正则表达式;/../m表示多行匹配(默认情况下不写/m也表示多行匹配;//i不区分大小写))
        pattern.exec(str)
        执行第一次结果为["JavaScript","Script"]
        执行第二次结果为["Java"]
        执行第三次结果为["JavaWeb","Web"]