数组字符串操作

替换掉字符串里所有指定的字符串: swtichParse('abc=def=hjk','||')=>'abc||def||hjk'    ,感觉有几点正则的全局g 

1 function swtichParse(str,replaceStrting,targetString){
2     return str.split(replaceStrting).join(targetString)
3 }
4 console.log(swtichParse('abc=def=hjk','=','||'))//abc||def||hjk

替换第一个遇到的目标值

1 function swtichParse(str,replaceStrting,targetString){
2     return str.replace(replaceStrting,targetString)
3 }
4 console.log(swtichParse('abc=def=hjk','=','||'))//abc||def=hjk

url解析

 1 var str='http://www.nowcoder.com?key=1&key=2&key=3&test=4#hehe';
 2 function swtichParse(str,name){
 3     var result={};
 4     str.replace(/\??(\w+)=(\w+)&?/g,function(s,k,v){
 5          if(result[k] !== undefined){
 6             result[k] = [].concat(result[k],v);
 7         }else{
 8             result[k] = v;
 9         }
10     })
11     if(name){
12         return result[name]
13     }else{
14          return result
15     }
16 }
17 console.log(swtichParse(str))//{key: Array(3), test: "4"}
18 console.log(swtichParse(str,'key'))//["1", "2", "3"]
19 console.log(swtichParse(str,'test'))//4