卡在我的游戏的 javascript 函数上

Question

所以我正在创建一个函数来接受两个参数，

第一个参数是人名
第二个是他们已经捐了多少钱。

每个人都被分配到一个数组，具体取决于他们期望捐赠多少。变量

中的人

a预计捐6个，
b 应该捐赠 5 和
c 捐出 4 个。

我希望函数 return 个人应该再捐多少，但问题是：无论我在控制台日志中输入什么名字，它总是假定此人来自 var a。我在这里错过了什么吗？

function findDonationRequirement(name, num){

var a = ["shad0vvfax","DarthPolekat","TheSchwartz",
"Johnnie SR91","Brodie", "HolyPaladin", "Kraven", "Dan Solo",
"Khorathian812", "KingWilliam"];

var b = ["Infantry0223","Ru Baruba Maral","Gray JediTim", "Moof Milker",
"Andain", "Cori Starfire", "Nassyy", "Roylas Trebla", "DarthPapirrin",
"MaximusGiganticus", "Wardai", "George3PO", "Revan2017", "Ravishing Dirk",
"dowi", "dogamidstwind", "SpinelessAce", "Devilscut88", "Dagez",
"The Buckster", "ddpf", "WoollyLemurToes", "Emeralthys Phantom  2060095",
"Lightnara1", "JoLy NYC",   "Ccube19", "Anectet Heat", "BigBadBoneDaddy",
"Grizzy", "Zanzibar", "Jesse", "BhMojo", "Kuu Raama", "Jay Fury", "N8Dog",
"Whiskytangofoxtrot"];

var c = ["KingofG0nd0r", "Chrome Cobra", "Bad Rongo", "TK421"];

if (a.hasOwnProperty(name)) {return 6 - num}

else if (b.hasOwnProperty(name)) {return 5 - num}

else if (c.hasOwnProperty(name)) {return 4 - num}

else "Not on list";}

console.log(findDonationRequirement("KingofG0nd0r", 3));

Answer 1

而不是 a.hasOwnProperty(name) 使用 a.indexOf(name) > 0

hasOwnProperty 是一个对象方法，用于查找名称为 name

的属性

indexOf 是一种数组方法，用于查找文字或对象在数组中的位置。当找不到它时 returns -1。因此，请使用它的值来确定它是否存在于 a 数组中。

更多关于 indexOf 的信息 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf

Answer 2

你应该使用 indexOf()

function findDonationRequirement(name, num) {

  var a = ["shad0vvfax", "DarthPolekat", "TheSchwartz",
    "Johnnie SR91", "Brodie", "HolyPaladin", "Kraven", "Dan Solo",
    "Khorathian812", "KingWilliam"
  ];

  var b = ["Infantry0223", "Ru Baruba Maral", "Gray JediTim", "Moof Milker",
    "Andain", "Cori Starfire", "Nassyy", "Roylas Trebla", "DarthPapirrin",
    "MaximusGiganticus", "Wardai", "George3PO", "Revan2017", "Ravishing Dirk",
    "dowi", "dogamidstwind", "SpinelessAce", "Devilscut88", "Dagez",
    "The Buckster", "ddpf", "WoollyLemurToes", "Emeralthys Phantom  2060095",
    "Lightnara1", "JoLy NYC", "Ccube19", "Anectet Heat", "BigBadBoneDaddy",
    "Grizzy", "Zanzibar", "Jesse", "BhMojo", "Kuu Raama", "Jay Fury", "N8Dog",
    "Whiskytangofoxtrot"
  ];

  var c = ["KingofG0nd0r", "Chrome Cobra", "Bad Rongo", "TK421"];

  if (a.indexOf(name)>-1) {
    return 6 - num
  } else if (b.indexOf(name)>-1) {
    return 5 - num
  } else if (c.indexOf(name)>-1) {
    return 4 - num
  } else {
    return "Not on list";
  }
}

console.log(findDonationRequirement("Ccube19", 3));
console.log(findDonationRequirement("Chrome bra", 3));

卡在我的游戏的 javascript 函数上

Stuck on a javascript function for my game

javascript

arrays

function

hasownproperty