在javascript中将重复的数组对象值替换为另一个

var indianTeam = [{
      firstName: "KL",
      lastName: "Rahul"
    }, {
      firstName: "Jayant",
      lastName: "Yadav"
    }, {
      firstName: "Umesh",
      lastName: "Yadav"
    }];
var indianTeam = [{
      firstName: "KL",