NilClass
Methods
B
D
T
Instance Public methods
blank?()

nil is blank:

nil.blank? # => true

@return [true]

Source: show | on GitHub 

# File activesupport/lib/active_support/core_ext/object/blank.rb, line 54
def blank?
  true
end
duplicable?()

nil is not duplicable:

nil.duplicable? # => false
nil.dup         # => TypeError: can't dup NilClass

Source: show | on GitHub 

# File activesupport/lib/active_support/core_ext/object/duplicable.rb, line 38
def duplicable?
  false
end
to_param()

Returns self.

Source: show | on GitHub 

# File activesupport/lib/active_support/core_ext/object/to_query.rb, line 18
def to_param
  self
end
try(*args)

Calling try on nil always returns nil. It becomes especially helpful when navigating through associations that may return nil.

nil.try(:name) # => nil

Without try

@person && @person.children.any? && @person.children.first.name

With try

@person.try(:children).try(:first).try(:name)

Source: show | on GitHub 

# File activesupport/lib/active_support/core_ext/object/try.rb, line 136
def try(*args)
  nil
end
try!(*args)

Calling try! on nil always returns nil.

nil.try!(:name) # => nil

Source: show | on GitHub 

# File activesupport/lib/active_support/core_ext/object/try.rb, line 143
def try!(*args)
  nil
end