From: gamelinks007@...
Date: 2020-08-13T09:58:21+00:00
Subject: [ruby-dev:50947] [Ruby master Feature#17121] Remove ENV#index

Issue #17121 has been updated by S_H_ (Shun Hiraoka).


Sorry, `ENV#index` is will be remove this pull request(https://github.com/ruby/ruby/pull/3412)

----------------------------------------
Feature #17121: Remove ENV#index
https://bugs.ruby-lang.org/issues/17121#change-87050

* Author: S_H_ (Shun Hiraoka)
* Status: Open
* Priority: Normal
----------------------------------------
`ENV#index` is deprecated since `ruby-1.9.0-0`.

So, remove it.

```bash
root@8785b339158a:/all-ruby#  env ALL_RUBY_SINCE=ruby-1.8 ./all-ruby -e 'ENV.index("RUBY")'
ruby-1.8.0
...
ruby-1.8.7-p374
ruby-1.9.0-0          -e:1: warning: ENV.index is deprecated; use ENV.key
...
ruby-2.7.0-rc1        -e:1: warning: ENV.index is deprecated; use ENV.key
ruby-2.7.0-rc2        -e:1: warning: ENV.index is deprecated; use ENV.key instead
...
ruby-2.7.1            -e:1: warning: ENV.index is deprecated; use ENV.key instead

```

pull request:
https://github.com/ruby/ruby/pull/3415



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