[ruby-core:118742] [Ruby master Feature#20657] Allow Enumerable#map(&:method) and #each accept additional parameters for method

Issue #20657 has been updated by matz (Yukihiro Matsumoto).


As @bkuhlmann mentioned, there's room for the language enhancement here to provide arguments to the method for a block. But not this way.
Because the arguments belong to the method, not the method call (each or map in the example).

Matz.

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Feature #20657: Allow Enumerable#map(&:method) and #each accept additional parameters for method
https://bugs.ruby-lang.org/issues/20657#change-109281

* Author: ukolovda (Dmitry Ukolov)
* Status: Open
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I can use `#map` (or `#each`) with short method name, for example:

``` ruby
a = ["a1", "b1", "c1"]

b = a.map(&:length)
# or
a.each(&:some_method)
```

But with additional arguments I must use yield:

```ruby
c = a.map { |item| item.ljust(10) }
# or
a.each { |item| item.some_method(arg1, arg2) }
```

Direct sending allow make the code more simple:
```ruby
c = a.map(&:ljust, 10) # Now give syntax error, unexpected ',', expecting ')'
# or
a.each(&:some_method, arg1, arg2) # Now give syntax error, unexpected ',', expecting ')'
```




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