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【JavaScript】JSONを検索して、特定のデータを取り出す方法

Last updated at Posted at 2020-02-26

まずはJSONデータを用意

とりあえずこんな感じで用意しました。

const JSONDATA = [
  {
    id: "aaa",
    name: "apple"
  },
  {
    id: "bbb",
    name: "orange"
  },
  {
    id: "ccc",
    name: "grape"
  }
];

idを指定してオレンジを取り出す!

「findIndex」を使って何番目かを確認し(0はじまり)、その番号を指定してJSONデータを返します。

const getFruitById = id => {
    const fruitIndex = JSONDATA.findIndex(data => data.id === id);
    return JSONDATA[fruitIndex];
};

const orange =  getFruitById("bbb");
console.log(orange.name); // display orange

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