2 # delete_undef_values.rb
4 module Puppet::Parser::Functions
5 newfunction(:delete_undef_values, :type => :rvalue, :doc => <<-DOC
6 Returns a copy of input hash or array with all undefs deleted.
10 $hash = delete_undef_values({a=>'A', b=>'', c=>undef, d => false})
12 Would return: {a => 'A', b => '', d => false}
14 $array = delete_undef_values(['A','',undef,false])
16 Would return: ['A','',false]
18 Note that since Puppet 4.0.0 the equivalent can be performed with the filter() function in Puppet:
20 $array.filter |$val| { $val =~ NotUndef }
21 $hash.filter |$key, $val| { $val =~ NotUndef }
26 raise(Puppet::ParseError, "delete_undef_values(): Wrong number of arguments given (#{args.size})") if args.empty?
28 unless args[0].is_a?(Array) || args[0].is_a?(Hash)
29 raise(Puppet::ParseError, "delete_undef_values(): expected an array or hash, got #{args[0]} type #{args[0].class} ")
33 result.delete_if { |_, val| val.equal?(:undef) || val.nil? }
34 elsif result.is_a?(Array)