Puppet Function: empty

Defined in:
lib/puppet/parser/functions/empty.rb
Function type:
Ruby 3.x API

Overview

empty() ⇒ Any

Returns true if the variable is empty.

Returns:

  • (Any) 


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# File 'lib/puppet/parser/functions/empty.rb', line 5

newfunction(:empty, :type => :rvalue, :doc => <<-DOC
  Returns true if the variable is empty.
DOC
           ) do |arguments|

  raise(Puppet::ParseError, "empty(): Wrong number of arguments given (#{arguments.size} for 1)") if arguments.empty?
  value = arguments[0]

  unless value.is_a?(Array) || value.is_a?(Hash) || value.is_a?(String) || value.is_a?(Numeric)
    raise(Puppet::ParseError, 'empty(): Requires either array, hash, string or integer to work with')
  end

  return false if value.is_a?(Numeric)
  result = value.empty?
  return result
end