javascript - 如何在Array对象中重复更改值

Question

输入:- 这里我有一个数组对象，其中 natraj 是重复的，所以我需要像给定的示例一样附加一些计数。

var aa= [
     {name:'natraj'},
     {name:'ajai'},
     {name:'natraj'},
     {name:'ajai'},
     {name:'barath'},
     {name:'ajai'},
     {name:'barath'},
     {name:'natraj'},
   ]

输出:-

  [
     {name:'natraj'},
     {name:'ajai'},
     {name:'natraj_1'},
     {name:'ajai_1'},
     {name:'barath'},
     {name:'ajai_2'},
     {name:'barath_1'},
     {name:'natraj_2'},
   ]

Answer 1

保持运行计数:

var aa = [{name:'natraj'},{name:'ajai'},{name:'natraj'},{name:'ajai'},{name:'barath'},{name:'ajai'},{name:'barath'},{name:'natraj'},]

let counts = {}
aa.forEach(o => {
  if (counts[o.name]) {
    o.name += `_${counts[o.name]++}`
  } else {
    counts[o.name] = 1
  }
});

console.log(aa)