module Vagrant::Util::Presence

Public Instance Methods

presence(obj) click to toggle source

Returns the presence of the object. If the object is {present?}, it is returned. Otherwise ‘false` is returned.

@return [Object, false]

# File lib/vagrant/util/presence.rb, line 36
def presence(obj)
  if present?(obj)
    obj
  else
    false
  end
end
present?(obj) click to toggle source

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.

@return [true, false]

# 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