主要なJavaScriptに基づいて配列を検索および更新します

このような2つのアレイがあります-

let arr1 =
[{"LEVEL":4,"POSITION":"RGM"},{"LEVEL":5,"POSITION":"GM"},{"LEVEL":5,"POSITION":"GMH"}]
let arr2 = [{"EMAIL":"[email protected]","POSITION":"GM"},
{"EMAIL":"[email protected]","POSITION":"GMH"},
{"EMAIL":"[email protected]","POSITION":"RGM"},
{"EMAIL":"[email protected]","POSITION":"GM"}
]

プロパティ「POSITION」の値が同じであるarr1のオブジェクトから取得して、arr2の各オブジェクトにプロパティレベルを追加する関数を作成する必要があります。

この関数のコードを書いてみましょう-

例

let arr1 =
[{"LEVEL":4,"POSITION":"RGM"},{"LEVEL":5,"POSITION":"GM"},{"LEVEL":5,"POSI
TION":"GMH"}]
   let arr2 = [{"EMAIL":"[email protected]","POSITION":"GM"},
   {"EMAIL":"[email protected]","POSITION":"GMH"},
   {"EMAIL":"[email protected]","POSITION":"RGM"},
   {"EMAIL":"[email protected]","POSITION":"GM"}
]
const formatArray = (first, second) => {
   second.forEach((el, index) => {
      const ind = first.findIndex(item => item["POSITION"] ===
      el["POSITION"]);
      if(ind !== -1){
         second[index]["LEVEL"] = first[ind]["LEVEL"];
      };
   });
};
formatArray(arr1, arr2);
console.log(arr2);

出力

コンソールの出力は-

[
   { EMAIL: '[email protected]', POSITION: 'GM', LEVEL: 5 },
   { EMAIL: '[email protected]', POSITION: 'GMH', LEVEL: 5 },
   { EMAIL: '[email protected]', POSITION: 'RGM', LEVEL: 4 },
   { EMAIL: '[email protected]', POSITION: 'GM', LEVEL: 5 }
]