please add x .= f()

[Andrea Giammarchi]

not only it's badly readable and reminds me the PHP string concatenation,
but it promotes different type assignment which is a performance, and
virtually strongly typed, anti-pattern.

I think Brendan said already it all, the proposal is badly described, and
it solve pretty much nothing in the real world.

Probably we can just move on and ignore the list of -1 we'll all put in? ;-)

Best Regards

On Mon, Aug 10, 2015 at 8:46 PM, <myemailum14 at gmail.com> wrote:

> Please no, while i can see how logically it's derived from a = a + 1
>
> a = a.f()
>
> a .= f()
>
> seems like a bad idea
>
> i can hardly see the dot
> why would i replace the object from which i'm calling the method in most
> cases looks inefficient
>
>
> On Mon, Aug 10, 2015 at 2:07 PM, Brendan Eich <brendan at mozilla.org> wrote:
>
>> Do not send "Please add" messages with two-line, half-baked sketches of
>> extensions to the language. That's just injecting noise with very little
>> signal.
>>
>> The "-1" you received will be the answer if pressed from everyone on
>> TC39, I would bet real money. Syntax is expensive, adding it for little
>> semantic gain and some downside user-confusion risk (plus a small
>> complexity tax hike for the language in full) is never the right answer.
>>
>> That you can scratch this itch (and many others like it) via sweet.js
>> does not argue for incorporating any such =. or .= operator into the core
>> language. Analyze developer patterns and nearby languages for better
>> candidate extensions that solve more serious usability or greater issues.
>>
>> /be
>>
>>
>> Florent FAYOLLE wrote:
>>
>>> Hello,
>>>
>>>> x .= f() should be syntax sugar for x = x.f()
>>>>
>>>> x .= f().g().h() should be x = x.f().g().h()
>>>>
>>>
>>> +1! I've made some weeks ago a prototype of this in sweet.js:
>>> https://github.com/fflorent/member-access-assignment
>>>
>>> Except that the syntax is rather =. (I have probably been influenced by
>>> the CoffeeScript's existential operator). The reverse looks fine to me too.
>>>
>>> -1 Please no :)
>>>>
>>> Why?
>>>
>>> Florent
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>
>
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