2 # delete_undef_values.rb
4 module Puppet::Parser::Functions
5 newfunction(:delete_undef_values, :type => :rvalue, :doc => <<-DOC
7 Returns a copy of input hash or array with all undefs deleted.
11 $hash = delete_undef_values({a=>'A', b=>'', c=>undef, d => false})
12 Would return: {a => 'A', b => '', d => false}
15 $array = delete_undef_values(['A','',undef,false])
16 Would return: ['A','',false]
19 Since Puppet 4.0.0 the equivalent can be performed with the built-in
20 [`filter`](https://puppet.com/docs/puppet/latest/function.html#filter) function:
21 $array.filter |$val| { $val =~ NotUndef }
22 $hash.filter |$key, $val| { $val =~ NotUndef }
24 @return [Array] The given array now issing of undefined values.
28 raise(Puppet::ParseError, "delete_undef_values(): Wrong number of arguments given (#{args.size})") if args.empty?
30 unless args[0].is_a?(Array) || args[0].is_a?(Hash)
31 raise(Puppet::ParseError, "delete_undef_values(): expected an array or hash, got #{args[0]} type #{args[0].class} ")
35 result.delete_if { |_, val| val.equal?(:undef) || val.nil? }
36 elsif result.is_a?(Array)