instance method `in?`

Ruby on Rails 3.2.22.5

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?(*args)

Returns true if this object is included in the argument(s). Argument must be any object which responds to #include? or optionally, multiple arguments can be passed in. Usage:

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

character = "Konata"
character.in?("Konata", "Kagami", "Tsukasa") # => true

This will throw an ArgumentError if a single argument is passed in and it doesn’t respond to #include?.

Parameters

args rest

Source

# File activesupport/lib/active_support/core_ext/object/inclusion.rb, line 13
  def in?(*args)
    if args.length > 1
      args.include? self
    else
      another_object = args.first
      if another_object.respond_to? :include?
        another_object.include? self
      else
        raise ArgumentError.new("The single parameter passed to #in? must respond to #include?")
      end
    end
  end

Defined in activesupport/lib/active_support/core_ext/object/inclusion.rb line 13 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Object

Signature

Parameters