De-structuring array arguments

# Sultan (7 years ago)

Consider the following is not possible today:

function foo ([a, b] = [1, 2]) {}

foo([2, 3])

While the the following is outside of function arguments:

const arr = [1, 2] const [a, b] = arr

Is there any reason for the current status quo?

Consider the following is not possible today:

function foo ([a, b] = [1, 2]) {}

foo([2, 3])

While the the following is outside of function arguments:

const arr = [1, 2]
const [a, b] = arr

Is there any reason for the current status quo?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.mozilla.org/pipermail/es-discuss/attachments/20190117/b9e6e66e/attachment.html>

# Jordan Harband (7 years ago)

I'm not sure what you mean, that should certainly be possible today. In node, I get this:


function foo ([a, b] = [1, 2]) { return [a, b]; }

foo([2, 3]) // [2, 3]

foo() // [1, 2]

I'm not sure what you mean, that should certainly be possible today. In
node, I get this:
```

function foo ([a, b] = [1, 2]) { return [a, b]; }

foo([2, 3]) // [2, 3]

foo() // [1, 2]

```

On Thu, Jan 17, 2019 at 9:50 AM Sultan <thysultan at gmail.com> wrote:

> Consider the following is not possible today:
>
> function foo ([a, b] = [1, 2]) {}
>
> foo([2, 3])
>
> While the the following is outside of function arguments:
>
> const arr = [1, 2]
> const [a, b] = arr
>
> Is there any reason for the current status quo?
>
> _______________________________________________
> es-discuss mailing list
> es-discuss at mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.mozilla.org/pipermail/es-discuss/attachments/20190117/411e05d9/attachment.html>

# Tab Atkins Jr. (7 years ago)

On Thu, Jan 17, 2019 at 1:36 PM Jordan Harband <ljharb at gmail.com> wrote:

I'm not sure what you mean, that should certainly be possible today. In node, I get this:
function foo ([a, b] = [1, 2]) { return [a, b]; }
foo([2, 3]) // [2, 3]
foo() // [1, 2]

Yup, and you get the same in browsers. It definitely works today.

On Thu, Jan 17, 2019 at 1:36 PM Jordan Harband <ljharb at gmail.com> wrote:
> I'm not sure what you mean, that should certainly be possible today. In node, I get this:
>
> ```
> function foo ([a, b] = [1, 2]) { return [a, b]; }
> foo([2, 3]) // [2, 3]
> foo() // [1, 2]
> ```

Yup, and you get the same in browsers. It definitely works today.

~TJ