Puppet Function: empty

Defined in:
puppet/modules/stdlib/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 'puppet/modules/stdlib/lib/puppet/parser/functions/empty.rb', line 6

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

  raise(Puppet::ParseError, "empty(): Wrong number of arguments " +
    "given (#{arguments.size} for 1)") if arguments.size < 1

  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

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

    return result
  end
end