TypeScript 编译问题

Question

index.ts 如下:

let deck = {
  suits: ['hearts', 'spades', 'clubs', 'diamonds'],
  cards: Array(arrayLength:52),
  createCardPicker: function() {
      return () => {
        let pickedCard = Math.floor(x:Math.random() * 52)
        let pickedSuit = Math.floor(x:pickedCard / 13)
        return {
          suit: this.suits[pickedSuit],
      card: pickedCard % 13
        }
    }
  }
}

let cardPicker = deck.createCardPicker()
let pickedCard = cardPicker()

console.log('card: '　+　pickedCard.card + ' of ' + pickedCard.suit)

tsc index.ts编译:报错:

index.ts(3,27): error TS1005: ',' expected.
index.ts(6,38): error TS1005: ',' expected.
index.ts(7,35): error TS1005: ',' expected.

问题答案:

arrayLength:　x:　这些貌似都是　webstome自动生成的提示性的内容,与程序本身无关.

Answer 1

不是编译问题，语法错误。没有 Array(arrayLength:52)这种写法的，后面的 x:Math.random() 也一样