instance method `in?`

Ruby on Rails 8.0.4

Since v3.1.12

Available in: v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

in?(another_object)

Returns true if this object is included in the argument.

When argument is a Range, #cover? is used to properly handle inclusion check within open ranges. Otherwise, argument must be any object which responds to #include?. Usage:

characters = ["Konata", "Kagami", "Tsukasa"]
"Konata".in?(characters) # => true

For non Range arguments, this will throw an ArgumentError if the argument doesn’t respond to #include?.

Parameters

another_object req

Source

# File activesupport/lib/active_support/core_ext/object/inclusion.rb, line 15
  def in?(another_object)
    case another_object
    when Range
      another_object.cover?(self)
    else
      another_object.include?(self)
    end
  rescue NoMethodError
    raise ArgumentError.new("The parameter passed to #in? must respond to #include?")
  end

Defined in activesupport/lib/active_support/core_ext/object/inclusion.rb line 15 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Object

Signature

Parameters