From 1da5dc55ee48fcd437f5b5df00a5b2f3991ec9f1 Mon Sep 17 00:00:00 2001 From: Micah Date: Tue, 24 May 2016 10:19:33 -0400 Subject: Squashed 'puppet/modules/stdlib/' content from commit 7112363 git-subtree-dir: puppet/modules/stdlib git-subtree-split: 71123634744b9fe2ec7d6a3e38e9789fd84801e3 --- lib/puppet/parser/functions/difference.rb | 36 +++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 lib/puppet/parser/functions/difference.rb (limited to 'lib/puppet/parser/functions/difference.rb') diff --git a/lib/puppet/parser/functions/difference.rb b/lib/puppet/parser/functions/difference.rb new file mode 100644 index 00000000..cd258f75 --- /dev/null +++ b/lib/puppet/parser/functions/difference.rb @@ -0,0 +1,36 @@ +# +# difference.rb +# + +module Puppet::Parser::Functions + newfunction(:difference, :type => :rvalue, :doc => <<-EOS +This function returns the difference between two arrays. +The returned array is a copy of the original array, removing any items that +also appear in the second array. + +*Examples:* + + difference(["a","b","c"],["b","c","d"]) + +Would return: ["a"] + EOS + ) do |arguments| + + # Two arguments are required + raise(Puppet::ParseError, "difference(): Wrong number of arguments " + + "given (#{arguments.size} for 2)") if arguments.size != 2 + + first = arguments[0] + second = arguments[1] + + unless first.is_a?(Array) && second.is_a?(Array) + raise(Puppet::ParseError, 'difference(): Requires 2 arrays') + end + + result = first - second + + return result + end +end + +# vim: set ts=2 sw=2 et : -- cgit v1.2.3