JS对象数组去重的3种方法示例及对比

// 原数据是这样的                   // 去重后数据是这样的
[{                                [{
  "goodsId": "1",                    "goodsId": "1",
  "quota": 12,                       "quota": 12,
  "skuId": "1"                       "skuId": "1"
},                                 },
{                                  {
  "goodsId": "2",                    "goodsId": "2",
  "quota": 12,                       "quota": 12,
  "skuId": "2"                       "skuId": "2"
},                                 }]
{
  "goodsId": "1",
  "quota": 12,
  "skuId": "1"
}]

function uniqueFunc(arr, uniId){
  const res = new Map();
  return arr.filter((item) => !res.has(item[uniId]) && res.set(item[uniId], 1));
}

function uniqueFunc2(arr, uniId){
  let hash = {}
  return arr.reduce((accum,item) => {
    hash[item[uniId]] ? '' : hash[item[uniId]] = true && accum.push(item)
    return accum
  },[])
}

function uniqueFunc3(arr, uniId){
  let obj = {}
  let tempArr = []
  for(var i = 0; i<arr.length; i++){
    if(!obj[arr[i][uniId]]){
      tempArr.push(arr[i])
      obj[arr[i][uniId]] = true
    }
  }
  return tempArr
}