JS 生成UUID

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JS生成UUID

function genId(){
 return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
     var r = Math.random() * 16 | 0,
       v = c == 'x' ? r : (r & 0x3 | 0x8);
     return v.toString(16);
   }).toUpperCase();
}