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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