match excel test search replace 用法

 1 test：测试string是否包含有匹配结果，包含返回true，不包含返回false。 
 2 reg.test(str)
 3 <script type="text/javascript">  
 4     var str = "bbs.byr.cn";  
 5     var reg = /b/;  
 6     var ret = reg.test(str);  
 7     alert(ret); //true  
 8 </script>  
 9 match：根据pattern进行正则匹配,如果匹配到,返回匹配结果,如匹配不到返回null
10 str.match(reg)
11 <script type="text/javascript">  
12     var str = "ThIS isn't me";   
13     var reg = /is/ig;  
14     var ret = str.match(reg);  
15     alert(ret); //IS, is  
16     console.log(ret); //["IS", "is"]   
17 </script>   
18 search ：根据pattern进行正则匹配,如果匹配到一个结果,则返回它的索引数;否则返回-1 
19 str.search(reg)
20 <script type="text/javascript">  
21     var str = "This isn't me";  
22     var reg = /is/;  
23     var ret = str.search(reg);  
24     alert(ret);//2  
25 </script>  
26 replace：根据pattern进行正则匹配,把匹配结果替换为replacement 
27 str.replace(reg)
28 <script type="text/javascript">  
29     var str = "i love china!";  
30     var pattern = /i/g;  
31     var ret = str.replace(pattern, "I");  
32     alert(ret); //I love chIna!  
33 </script>  
34 
35 split：根据pattern进行正则分割,返回一个分割的数组
36 <script type="text/javascript">  
37     var  str = 'http://www.baidu.com/';  
38     var  reg = /\W/;  
39     var  ret = str.split(reg);  
40     console.log(ret); //["http", "", "", "www", "baidu", "com", ""]   
41 </script>  
42 exec：对string进行正则处理,并返回匹配结果.array[0]为原字符串,array[i]为匹配在整个被搜索字符串中的位置。
43 reg.replace(str)
44 <script type="text/javascript">  
45     var str = "i love china!";   
46     var reg = /i\B/g;   
47     var ret = reg.exec(str);   
48     alert(ret); // i  
49     console.log(ret); //["i", index: 9, input: "i love china!"]   
50 </script>