[ruby-core:98739] [Ruby master Feature#16939] Alias _1 as _ for block numbered params

Issue #16939 has been updated by x3qt (Yury Polyakov).


matz (Yukihiro Matsumoto) wrote in #note-2:
> It was the first candidate for a single anonymous block parameter. But we abandoned for the compatibility's sake. Too many existing programs use `_` as a local variable (far too more than `_1`).
> 
> We'd be happy to be proven wrong. If someone is willing to experiment and to find the solution to solve the compatibility problem, please reopen the issue.
> 
> Matz.

Could you please point us to an existing discussion or maybe show a few examples?

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Feature #16939: Alias _1 as _ for block numbered params
https://bugs.ruby-lang.org/issues/16939#change-86094

* Author: x3qt (Yury Polyakov)
* Status: Closed
* Priority: Normal
----------------------------------------
I propose to alias `_1` as `_` for block numbered params, so the following statements should be equal –
``` ruby
[1,2,3].map { _1 ** 2 }

[1,2,3].map { _ ** 2 }
```
There is an [anonymous function argument literal](https://clojure.org/reference/reader#_dispatch) in Clojure and it feels natural all the way, hope we can have the one too.



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