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-rw-r--r--lib/puppet/parser/functions/unique.rb51
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/unique.rb b/lib/puppet/parser/functions/unique.rb
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+++ b/lib/puppet/parser/functions/unique.rb
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+#
+# unique.rb
+#
+
+module Puppet::Parser::Functions
+ newfunction(:unique, :type => :rvalue, :doc => <<-EOS
+This function will remove duplicates from strings and arrays.
+
+*Examples:*
+
+ unique("aabbcc")
+
+Will return:
+
+ abc
+
+You can also use this with arrays:
+
+ unique(["a","a","b","b","c","c"])
+
+This returns:
+
+ ["a","b","c"]
+ EOS
+ ) do |arguments|
+
+ raise(Puppet::ParseError, "unique(): Wrong number of arguments " +
+ "given (#{arguments.size} for 1)") if arguments.size < 1
+
+ value = arguments[0]
+ klass = value.class
+
+ unless [Array, String].include?(klass)
+ raise(Puppet::ParseError, 'unique(): Requires either ' +
+ 'array or string to work with')
+ end
+
+ result = value.clone
+
+ string = value.is_a?(String) ? true : false
+
+ # We turn any string value into an array to be able to shuffle ...
+ result = string ? result.split('') : result
+ result = result.uniq # Remove duplicates ...
+ result = string ? result.join : result
+
+ return result
+ end
+end
+
+# vim: set ts=2 sw=2 et :