javascript 数组去重后合并

Question

         var arr1 =[{id:1,name:1},{id:2,name:2},{id:3,name:3}]；            var arr2 =[{id:1,name:111}]；            var arr3 =[{id:4,name:44},{id:5,name:55}]；比如原始数组是arr1，另外一个数组可能是arr2,也可能是arr3；怎么实现后面2个数组和arr1对比后，如果id重复了，就去重,如果id没有重复就合并成一个数组；类似如果和arr2对比：arr1就是：[{id:2,name:2},{id:3,name:3}]；如果是arr3对比:arr1就是：[{id:1,name:1},{id:2,name:2},{id:3,name:3}，{id:4,name:44},{id:5,name:55}]；