跨数组访问对象值

Question

我正在尝试跨数组访问对象值，但每次都显示为未定义。如何让数组“terrain”使用“Dirt”对象变量，例如 SpawnChance？

var terrain = new Array("Dirt1", "Dirt2", "Dirt3");

var Dirt1 = new Object();

Dirt1.Name = 'Dirt1';

Dirt1.Level = '1';

Dirt1.SpawnChance = '70';

var Dirt2 = new Object();

Dirt2.Name = 'Dirt2';

Dirt2.Level = '1';

Dirt2.SpawnChance = '15';

var Dirt3 = new Object();

Dirt3.Name = 'Dirt3';

Dirt3.Level = '1';

Dirt3.SpawnChance = '10';

if ($("#startingblock").hasClass("Dirt1")) {

  var blockcount = (Math.floor(Math.random() * 20) + 1) * 2;

  var blockcount = blockcount * blockcount;

  var i = 0;

  while (i < blockcount) {

    var randomizer = (Math.floor(Math.random() * 100) + 1);

    var terraintypes = terrain.length;

    var terrainrandoms = (Math.floor(Math.random() * terraintypes) + 0);

    var newrandomterrain = (terrain[terrainrandoms]);

    var randomterrainspawnchance = newrandomterrain.SpawnChance;

    terrain.push(newrandomterrain);

    alert(newrandomterrain);

    i++;

  }

Answer 1

您正在尝试访问SpawnChance字符串上的方法 - 例如。"Dirt1".&nbsp;你想要对象本身 - 所以这是问题的根源：var&nbsp;terrain&nbsp;=&nbsp;new&nbsp;Array("Dirt1",&nbsp;"Dirt2",&nbsp;"Dirt3");改为这样：var&nbsp;terrain&nbsp;=&nbsp;new&nbsp;Array(Dirt1,&nbsp;Dirt2,&nbsp;Dirt3);（或者更好的是：var&nbsp;terrain&nbsp;=&nbsp;[Dirt1,&nbsp;Dirt2,&nbsp;Dirt3]没有理由使用Array构造函数而不是文字形式）请注意，您必须在代码中将其移至这些对象的定义之后。