Creating and consuming custom iterators
In ES5 there is a concept of array-like, which while probably too relaxed is really friendly for developers, as we can easily create custom array-like abstractions and make it consumable to any generic functions, methods that process array-likes. In ES6 there's more advanced (and definitely better) iterators concept, while I'm pretty excited by it, If read spec correctly I see it's quite limited and not that usable. 1 There's no way I can create custom iterator abstraction (How can I can define MyCustomIterator.prototype[@@iterator] method?). 2. There's no straightforward way to consume iterators in generic way, e.g. I want to write function that works in similar way as Set constructor, and accepts any iterator implementation. I don't have a means to call iterator[@@iterator] method. Please correct me if I'm wrong, but if it's the case, I think it's really important to open that. Maybe there should be Reflect.getIterator(obj) and Reflect.defineIterator(obj, getIterator) for that? -- View this message in context: http://mozilla.6506.n7.nabble.com/Creating-and-consuming-custom-iterators-tp289598.html Sent from the Mozilla - ECMAScript 4 discussion mailing list archive at Nabble.com. ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
Re: Creating and consuming custom iterators
1 There's no way I can create custom iterator abstraction (How can I can define MyCustomIterator.prototype[@@iterator] method?). 2. There's no straightforward way to consume iterators in generic way, e.g. I want to write function that works in similar way as Set constructor, and accepts any iterator implementation. I don't have a means to call iterator[@@iterator] method. Please correct me if I'm wrong, but if it's the case, I think it's really important to open that. Maybe there should be Reflect.getIterator(obj) and Reflect.defineIterator(obj, getIterator) for that? There will be a public symbol (that you can import from a system module) that will allow you to do both things. -- Dr. Axel Rauschmayer a...@rauschma.de home: rauschma.de twitter: twitter.com/rauschma blog: 2ality.com ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
Re: Creating and consuming custom iterators
There will be a public symbol (that you can import from a system module) that will allow you to do both things. There's no problem then. Thanks -- View this message in context: http://mozilla.6506.n7.nabble.com/Creating-and-consuming-custom-iterators-tp289598p289600.html Sent from the Mozilla - ECMAScript 4 discussion mailing list archive at Nabble.com. ___ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
