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javascript從數組中讀取對象

JavaScript

慕容森 2022-10-08 16:05:25

我如何讀取列表中的玩家姓名？let Players = []let Player = { sprite: 1, coords: {M: 0, X: 0, Y: 0}, name: ""}function LoadPlayers(){console.log("total players: " + Players.length)let player1 = Playerplayer1.sprite = 0player1.coords = {M: 0, X: 6, Y: 1};player1.name = "jimpie"Players.push([player1]);let player2 = Player player2.sprite = 0player2.coords = {M: 0, X: 1, Y: 17};player2.name = "kolien"Players.push([player2]);console.log("total players: " + Players.length)console.log("Player 1 name: " + Players[1].name)console.log("Player 2 name: " + Players[0].name)}我現在得到“未定義”，我想從列表中的特定玩家讀出玩家詳細信息。

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3 回答

飲歌長嘯

TA貢獻1951條經驗獲得超3個贊

你有不同的錯誤。

首先，您必須使用new Player()而不僅僅是player.

其次，你應該使用這個：

Players.push(player1);

而不是這個：

Players.push([player1]);

第一個將 player1 推送到 Players 數組，第二個將僅包含 player1 的新數組推送到數組 Players。您還必須使用它來添加 player2。

反對回復 2022-10-08

FFIVE

TA貢獻1797條經驗獲得超6個贊

這是因為您沒有Player正確創建一個。而不是使用let player1 = Player，使用let player1 = new Player()。此外，您需要創建一個Players數組。最后，你需要Player上課。

class Player {

constructor(sprite, coords, name) {

this.sprite = sprite;

this.coords = coords;

this.name = name;

}

var Players = []; // If you want to access this array

// from outside thefunction, keep it here.

// Otherwise, move it in the LoadPlayers function

function LoadPlayers() {

let player1 = new Player(0, {

M: 0,

X: 6,

Y: 1

}, "jimpie");

Players.push(player1);

let player2 = new Player(0, {

M: 0,

X: 1,

Y: 17

}, "kolien")

Players.push(player2);

console.log("total players: " + Players.length)

console.log("Player 1 name: " + Players[0].name)

console.log("Player 2 name: " + Players[1].name)

}

LoadPlayers();

反對回復 2022-10-08

慕容708150

TA貢獻1831條經驗獲得超4個贊

function Player(sprite, coords, name){

this.sprite = sprite;

this.coords = coords;

this.name = name;

}

let Players = []

function LoadPlayers(){

console.log("total players: " + Players.length)

let player1 = new Player(1, [32, 15, 14], "jimpie")

Players.push(player1);

let player2 = new Player(1, (1, 1, 1), "kolien")

Players.push(player2);

console.log("total players: " + Players.length)

console.log("Player 1 name: " + Players[0].coords)

console.log("Player 2 name: " + Players[1].name)

var allcoords = Players[0].coords

var xcoord = allcoords[1]

var ycoord = allcoords[2]

var mapnum = allcoords[0]

console.log("map: " + mapnum + " x: " + xcoord + " y: " + ycoord);

}

這很好用！

反對回復 2022-10-08

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javascript從數組中讀取對象

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