Prototype methods that accept a callback

[rwaldron]

I didn't see any examples of this, so I'm curious:

let numbers = [1, 2, 3];
let mapped =  numbers.map {
  // ...
}

Does this work? How would I get the value, index, object args?

[samuelgoto]

This wouldn't work in the current formulation, as it is limited to functions (as opposed to methods). Do you think this use case is important enough that you think we should care?

WRT parameters, this is the current formulation:

https://github.com/samuelgoto/proposal-block-params#bindings

Which granted would be a bit awkward in this case.

On Thu, Nov 9, 2017 at 11:17 AM, Rick Waldron [email protected] wrote:

I didn't see any examples of this, so I'm curious:

let numbers = [1, 2, 3];let mapped = numbers.map { // ... }

Does this work? How would I get the value, index, object args?

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[rwaldron]

https://github.com/samuelgoto/proposal-block-params#bindings

Hopefully any suggestions that include special properties of a this object are off limits until https://github.com/samuelgoto/proposal-block-params/issues/16 is resolved.

[samuelgoto]

To be clear, this is as close as it would get in the current formulation (without any assumptions made on the this reference).

let numbers = [1, 2, 3];
let mapped =  map(numbers) do (value, index) {
  // ...
  console.log(`${value} ${index}`);
}

Does that sound reasonable?