Module: Vagrant::Util::Presence

Extended by:
Presence
Included in:
Action::General::PackageSetupFolders, Presence
Defined in:
lib/vagrant/util/presence.rb

Instance Method Summary collapse

Instance Method Details

#presence(obj) ⇒ Object, false

Returns the presence of the object. If the object is #present?, it is returned. Otherwise false is returned.

Returns:

  • (Object, false)

36
37
38
39
40
41
42
# File 'lib/vagrant/util/presence.rb', line 36

def presence(obj)
  if present?(obj)
    obj
  else
    false
  end
end

#present?(obj) ⇒ true, false

Determines if the given object is "present". A String is considered present if the stripped contents are not empty. An Array/Hash is considered present if they have a length of more than 1. "true" is always present and false and nil are always not present. Any other object is considered to be present.

Returns:

  • (true, false)

13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
# File 'lib/vagrant/util/presence.rb', line 13

def present?(obj)
  case obj
  when String
    !obj.strip.empty?
  when Symbol
    !obj.to_s.strip.empty?
  when Array
    !obj.compact.empty?
  when Hash
    !obj.empty?
  when TrueClass, FalseClass
    obj
  when NilClass
    false
  when Object
    true
  end
end