YU HengChun (2018-06-03T17:46:50.000Z)
> ```js
> function CustomNumber(x = void([Number, mod.BigNumber]) || 42) {
>   // ...
> }
> ```
> 
> which is arguably awkward.

Easy, change the word well.

```js
function CustomNumber(x = typeof([Number, mod.BigNumber]) && 42) {
  // ...
}
```
achun.shx at qq.com (2018-06-03T18:14:31.035Z)
> ```js
> function CustomNumber(x = void(Number, mod.BigNumber) || 42) {
>   // ...
> }
> ```
> 
> which is arguably awkward.

Easy, change the word well.

```js
function CustomNumber(x = typeof(Number, mod.BigNumber) && 42) {
  // ...
}
```

ps: BUG! symbol [] is incorrect
achun.shx at qq.com (2018-06-03T18:00:55.341Z)
> ```js
> function CustomNumber(x = void([Number, mod.BigNumber]) || 42) {
>   // ...
> }
> ```
> 
> which is arguably awkward.

Easy, change the word well.

```js
function CustomNumber(x = typeof(Number, mod.BigNumber) && 42) {
  // ...
}
```