How can the Selector/Select Expression be used with
`Array.prototype.find()`? What happens when the property is not defined?
For example using the same code for more than one browser
```
const stream = [canvasStream, videoTrack].find(({requestFrame: _}) => _);
```
the property `requestFrame` is either defined or not defined at
```canvasStream``` or ```videoTrack``` depending on the implementation.
Although the assigned variable can be reduced to 1 character at
destructuring assignment, there is still the redundancy of writing ```_```
again on the right side of ```=>```.
If the property is not found, is the result ```undefined```?
What is the least amount characters necessary using Selector/Select
Expression with ```find()```?
```
const stream = [canvasStream, videoTrack].find(=.requestFrame);
```
?
On Thu, Jun 27, 2019 at 8:48 PM Bob Myers <r...@gol.com> wrote:
> Not exactly, since the optional chaining operator is `?.` with no space in
> between.
>
> On Thu, Jun 27, 2019 at 1:37 PM Simon Farrugia <simonfarrugi...@gmail.com>
> wrote:
>
>> Also, without a leading token, a selector expr with the optional chaining
>> operator inside a ternary operator would be ambiguous.
>>
>> ```
>>
>> const contactSelector = true ? .contacts.email : .contacts.phone;
>>
>> ```
>>
>>
>> _______________________________________________
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> https://mail.mozilla.org/listinfo/es-discuss
>
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