Issue #6245 has been reported by regularlambda (Mahmut Bulut).

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Feature #6245: "is_integer?" method declaration in prelude
https://bugs.ruby-lang.org/issues/6245

Author: regularlambda (Mahmut Bulut)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 2.0.0


Dear Rubyists, can we add "is_integer?" method to our core for main purposes of checking integerITY?
I add it to "golf_prelude.rb" below of "to_a" stub.

https://github.com/ruby/ruby/pull/112

https://github.com/ruby/ruby/pull/112.patch

**This can be in class Fixnum. I don't know this is true place for it?


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