Solution for throttle decorator is incorrect. (Decorators and forwarding, call/apply)

還沒有人認領這個 Issue。

Original code: https://javascript.info/call-apply-decorators#throttle-decorator

Here's a small code snippet to show where it doesn't work.

```js
function f(a) { console.log(a) };

let g = throttle(f, 1000);

for(let i = 0; i < 1e8; i++) g(i);
```

#### Expected Output
1, 249204, 452039, ... , 9999999 (These are random increasing numbers)

#### Output
1, 9999999

#### Why does it fail?
```js
function wrapper() {

if (isThrottled) { // (2)
savedArgs = arguments;
savedThis = this;
return;
}
isThrottled = true;

func.apply(this, arguments); // (1)

setTimeout(function() {
isThrottled = false; // (3)
if (savedArgs) {
wrapper.apply(savedThis, savedArgs);
savedArgs = savedThis = null;
}
}, ms);
}
```
In above, `isThrottled = false` assignment is done inside `setTimeout` callback. However, only one callback is pushed into task queue and it isn't executed until stack is empty (for loop has to be completed).
`isThrottled` is always `true` => `setTimeout` isn't called => one callback (that was registered for initial false `isThrottled`) => cb executed at end and outputs last value => output: 1, 9999999.

#### Correct Solution: https://github.com/javascript-tutorial/en.javascript.info/pull/2844
This PR giving an alternative solution.

從連結的教學「Decorators and forwarding, call/apply」部分中的 throttle decorator 範例開始，並重現所提供的 tight-loop snippet。將目前行為與 pull request #2844 進行比較；完成的標準是該範例不再將迴圈壓縮為只有第一個值和最後一個值。

由索引模型根據 Issue 內容生成。