[ruby-core:61467] [ruby-trunk - Feature #9635] Map a hash directly to a hash

Issue #9635 has been updated by Matthew Kerwin.


 At the risk of being terse, https://bugs.ruby-lang.org/issues/7793

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Feature #9635: Map a hash directly to a hash
https://bugs.ruby-lang.org/issues/9635#change-45759

* Author: Andrey Mikhaylov
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
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There should be a way to directly map a hash to a hash.

The current way to do it is not very graceful:

~~~
{foo: 'foo', bar: 'bar'}.map { |key, value| [key.upcase, value.reverse] }.to_h     # => { :FOO => 'oof', :BAR => 'rab' }
~~~

I think there should be a simpler and more natural way to do that. Something like this:

~~~
{foo: 'foo', bar: 'bar'}.hashy_map { |key, value| key.upcase => value.reverse }    # => { :FOO => 'oof', :BAR => 'rab' }
~~~



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