arr1 = [ {uid:"111111",name:"test1"}, {uid:"222222",name:"test2"}, {uid:"333333",name:"test3"}, {uid:"444444",name:"test4"}, {uid:"555555",name:"test5"}, ] arr2 = [ {uid:"111111", score:100}, {uid:"222222", score:80}, {uid:"333333", score:85}, {uid:"444444", score:95}, ] 想要合并成一个新的数组，uid没有分数据用0填充，如何在小程序的 js里面实现？ 实现结果： arr3 = [ {name:"test1",score:100}, {name:"test2",score:80}, {name:"test3",score:85}, {name:"test4",score:95}, {name:"test5",score:0}, ]