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On Fri, Jun 12, 2015 at 6:55 PM KOLANICH <[email protected]> wrote: > Hello all. I have opened the page > https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/ECMAScript_6_support_in_Mozilla > and was horrified. What happened with JS? Why do we need all this methods? > Why a lot of functionality is now doubled, and a lot of new badly designed > API and language features was introduced? I understand the word > "compatibility", but I think that no compatibility worth enough to be > preserved sacrificing the language design making it self-contradictary. > For example, Object.is compares identity. Operator === also compares > identity but in a bit differrent way. Why not just make == check equality > only between compatible types, === check identity (that the object is the > same) and throw out Object.is. Operator [] casts its argument to string ... > but not when used with Symbol (why not just allow the key to be any object > and match using ===). New iterator API relyes on Symbol.iterator. Why do we > need it? Why not just use strings and prototypes? fromCodePoint doubles > fromCharCode, but differs a bit. Why didn't you repurpose fromCharCode, > just allowing it to take a string arguments describing codepages? > Iterability and enumerability are distinct, but iterability is just > enumerability with numeric key (yeah, I know that it is possible to create > endless or random iterator, but in fact this means that you just don't need > to use the key provided). Why there is iterability, but not enumerability > with properties of iterability and enumerability united? Why we need > enumerability to make it work with for ... in and iterability to make it > work with for ... of? Why can't we use methods definitions to define > methods as a function declaration? Why JS is so badly designed? > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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