Any name would do, I'm rather interested in the proposal itself, and its ergonomics/logic ;-)
On Fri, Feb 7, 2020 at 10:11 PM Scott Rudiger <[email protected]> wrote: > `StructuredArray` or `StructArray` for short? Just throwing it out there. > > On Fri, Feb 7, 2020, 1:08 PM Andrea Giammarchi < > [email protected]> wrote: > >> well, this proposal has nothing to do with Typed Arrays, as these are all >> fixed size indeed ... scratch the TypedArray name, and use ArrayKind >> instead, any better outcome? >> >> On Fri, Feb 7, 2020 at 7:51 PM Jordan Harband <[email protected]> wrote: >> >>> the "type" in Typed Arrays refers to the bit size in memory; being able >>> to pass an arbitrary value seems like it would require implementations to >>> calculate the precise (not just the maximum) memory size a single item >>> requires. >>> >>> On Fri, Feb 7, 2020 at 6:33 AM Andrea Giammarchi < >>> [email protected]> wrote: >>> >>>> As more and more often devs are shifting into TS, or would like to have >>>> dynamic typed arrays without a fixed length, and as v8 and likely other >>>> engines too optimize a lot for same-kind arrays, I wonder what people here >>>> think about this `TypedArray` rough proposal: >>>> >>>> # Signature: >>>> >>>> ```js >>>> new TypedArray( >>>> type, // either a "type" to infer, or a shape, or a Class >>>> length // optional: if defined it's fixed size >>>> ); >>>> ``` >>>> >>>> >>>> ## About the `type` >>>> >>>> * if the inferred type is `object`: >>>> * if the object is `null`, throw new InvalidType >>>> * if the object is a literal, or its `__proto__` is either `null` >>>> or `Object.prototype, enforce own properties and respective types >>>> * if the object is not literal, fallback to object Class (`/./` is >>>> `RegExp`, `() => {}` is `Function`, etc) >>>> * if the inferred `type` is `function`, fallback to Class >>>> * if the inferred `type` is `Class`, ensure each entry is an instance >>>> of such class, or throw InvalidType >>>> * in every other case, make a _typed_ collection of `number`, >>>> `string`, `boolean`, or `symbol` >>>> >>>> >>>> ## About the `length` >>>> >>>> * if provided, the collection has a fixed, immutable, length, and >>>> each initial entry a default value >>>> >>>> >>>> # Use Cases: >>>> >>>> ```js >>>> const numbers = new TypedArray(0, 5); >>>> // creates [0, 0, 0, 0, 0] >>>> // numbers length is immutable >>>> // numbers accepts only typeof number >>>> // out of bound entries throw >>>> >>>> let numbers = new TypedArray(0); >>>> // numbers length is dynamic >>>> // numbers accepts only typeof number >>>> // out of bound entries throw >>>> >>>> const shapes = new TypedArray({name: '', age: 0}, 3); >>>> // creates [{name: '', age: 0}, {name: '', age: 0}, {name: '', age: 0}] >>>> // shapes length is immutable >>>> // shapes accepts only objects with `name` and `age` and respective >>>> types >>>> // out of bound entries throw >>>> >>>> let shapes = new TypedArray({lat: 0, long: 0}); >>>> // shapes length is dynamic >>>> // shapes accepts only objects with `lat` and `long` and respective >>>> types >>>> // out of bound entries throw >>>> >>>> const classes = new TypedArray(HTMLElement, 2); >>>> // creates [Object.create(HTMLElement.prototype), >>>> Object.create(HTMLElement.prototype)] >>>> // classes length is immutable >>>> // classes accepts only instances of HTMLElement >>>> // out of bound entries throw >>>> >>>> let classes = new TypedArray(HTMLElement); >>>> // classes length is dynamic >>>> // classes accepts only instances of HTMLElement >>>> // out of bound entries throw >>>> >>>> // more options >>>> let strings = new TypedArray(''); >>>> let booleans = new TypedArray(true); >>>> let functions = new TypedArray(Function); >>>> let coords = new TypedArray({lat: 0, long: 0}); >>>> ``` >>>> >>>> Thanks in advance for eventual thoughts on this 👋 >>>> _______________________________________________ >>>> es-discuss mailing list >>>> [email protected] >>>> https://mail.mozilla.org/listinfo/es-discuss >>>> >>> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
