1 files changed, 51 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/unique.rb b/lib/puppet/parser/functions/unique.rb
new file mode 100644
index 0000000..8844a74
--- /dev/null
+++ b/lib/puppet/parser/functions/unique.rb
@@ -0,0 +1,51 @@
+#
+# 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 :