函数重载错误：TS7006：参数“ x”隐式具有“ any”类型

Question

这是在官方网站上发布的函数重载的示例：

let suits = ["hearts", "spades", "clubs", "diamonds"];

function pickCard(x: {suit: string; card: number; }[]): number;
function pickCard(x: number): {suit: string; card: number; };
function pickCard(x): any {
    // Check to see if we're working with an object/array
    // if so, they gave us the deck and we'll pick the card
    if (typeof x == "object") {
        let pickedCard = Math.floor(Math.random() * x.length);
        return pickedCard;
    }
    // Otherwise just let them pick the card
    else if (typeof x == "number") {
        let pickedSuit = Math.floor(x / 13);
        return { suit: suits[pickedSuit], card: x % 13 };
    }
}

当我将此代码放入工作的打字稿文件时，出现错误：

错误：（5，19）TS7006：参数'x'隐式具有'any'类型。

如何使这个例子起作用？

Answer 1

那是因为您可能已经noImplicitAny标记了。
在这种情况下，您可以执行以下操作：

function pickCard(x: any): any {
    ...
}

要么：

function pickCard(x: number | {suit: string; card: number; }[]): any {
    ...
}