5 module Puppet::Parser::Functions
6 newfunction(:difference, :type => :rvalue, :doc => <<-EOS
7 This function returns the difference between two arrays.
8 The returned array is a copy of the original array, removing any items that
9 also appear in the second array.
13 difference(["a","b","c"],["b","c","d"])
19 # Two arguments are required
20 raise(Puppet::ParseError, "difference(): Wrong number of arguments given (#{arguments.size} for 2)") if arguments.size != 2
25 unless first.is_a?(Array) && second.is_a?(Array)
26 raise(Puppet::ParseError, 'difference(): Requires 2 arrays')
29 result = first - second
35 # vim: set ts=2 sw=2 et :