[ruby-core:119860] [Ruby master Feature#20882] Provide Boolean(...)

Issue #20882 has been updated by HarlemSquirrel (Kevin McCormack).


A project I work on has added the following patch. I kind of the like the simplicity of `#to_b`

```
class Object
  # Returns true for '1', 'true', true
  # Returns false for '0', 'false', false, '', nil
  #
  # @return [Boolean]
  def to_boolean
    present? && ActiveRecord::Type::Boolean.new.cast(self)
  end
  alias to_b to_boolean
end
```

----------------------------------------
Feature #20882: Provide Boolean(...)
https://bugs.ruby-lang.org/issues/20882#change-110550

* Author: getajobmike (Mike Perham)
* Status: Open
----------------------------------------
Ruby provides Integer(...) and Float(...) global methods to coerce values. Is there a similar method for Booleans?

I'd like to do something like:

```
# ENV["SOME_FEATURE"] is unset
Boolean(ENV["SOME_FEATURE"]) # => false

# ENV["SOME_FEATURE"] is unset, but allow a default?
Boolean(ENV["SOME_FEATURE"], true) # => true

# explicitly disable
ENV["SOME_FEATURE"] = "0"
Boolean(ENV["SOME_FEATURE"], true) # => false

# explicitly enable
ENV["SOME_FEATURE"] = "1"
Boolean(ENV["SOME_FEATURE"]) # => true
```



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