使用變量查找 json object

Question

我正在嘗試使用變量來匹配數組中的 id

玩家下有 10 個 arrays ，我想循環瀏覽所有這些以查看我的變量是否與 id 匹配。 如果是這樣，它應該使用該數組來顯示對象。

async function showMatch() {
// My variable
let userid = 71471603
let Response = await fetch(`https://api.myjson.com/bins/1e96uo`);
let matchlist = await Response.json();

}
showMatch(); 

所以它應該 go 循環每個matchlist.players[0 to 9].id ，看看它是否與我的用戶 ID 變量匹配。

Answer 1

考慮這個例子：

const animals = [
    {
        "name": "cat",
        "size": "small",
        "weight": 5
    },
    {
        "name": "dog",
        "size": "small",
        "weight": 10
    },
    {
        "name": "lion",
        "size": "medium",
        "weight": 150
    },
    {
        "name": "elephant",
        "size": "big",
        "weight": 5000
    }
];

let filterArray = animals.filter((animal) => {return animal.size === 'small'});
console.log(filterArray);// Returns an array which satisfies the match

使用.filter從數組中過濾掉要查找的值。

Answer 2

這應該可以解決問題：

async function showMatch() {
  const userid = 71471603
  const Response = await fetch(`https://api.myjson.com/bins/1e96uo`);
  const matchlist = await Response.json();

  return matchlist.players.filter(player => players.id === userid)
}

Answer 3

簡短回答：控制台，因為您無法從 promise function 返回（使用 then 除外）

 console.log(matchList.players.filter(player => player.id === userid)[0])

長答案：如果您在控制台中執行此代碼，它將控制以下信息：

1-西班牙人

2-艾爾莎

async function showMatch(idOfSpecificUser) {
  // idOfSpecificUser: the id of the user you want his/her information
  // make the GET request
  let response = await fetch(`https://api.myjson.com/bins/1e96uo`);
  // convert the response to JSON
  let responseToJson = await response.json();
  // take the players array from the response after convert it to JSON
  let playersArrayOfObject = responseToJson.players;
  // console.log(playersArrayOfObject); // => [ {}, {}, {}, ... ]

  // now the real fun start
  // you need to iterate over this array and get the user data
  // why [0] cause filter return to you array of object (we need the first match)
  // or the only one match // => [ {id: 71471603, username: "EspartaN", .....} ]
  let userInfo = playersArrayOfObject.filter(
    user => user.id === idOfSpecificUser
  )[0];


  console.log(userInfo.username); //=> "EspartaN"
  console.log(userInfo); // => { id: 71471603, username: "EspartaN", ..... }
}

// => "EspartaN"
showMatch(71471603);

// => "Elsa"
showMatch(97531);

如果您需要任何解釋，或者這不是您要問的，請評論我的回答