Class: NilClass

Inherits:

Object

• Object
• NilClass

Defined in:

lib/roda/component/object/try.rb,
lib/roda/component/object/blank.rb

Instance Method Summary

• #blank? ⇒ true

  nil is blank:.

• #try(*args) ⇒ Object

  Calling try on nil always returns nil.

• #try!(*args) ⇒ Object

  Calling try! on nil always returns nil.

Instance Method Details

#blank? ⇒ true

nil is blank:

nil.blank? # => true

Returns:

• (true)

# File 'lib/roda/component/object/blank.rb', line 56

def blank?
  true
end

#try(*args) ⇒ Object

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)

# File 'lib/roda/component/object/try.rb', line 96

def try(*args)
  nil
end

#try!(*args) ⇒ Object

Calling try! on nil always returns nil.

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

# File 'lib/roda/component/object/try.rb', line 103

def try!(*args)
  nil
end