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-rw-r--r--lib/puppet/parser/functions/delete_values.rb26
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/delete_values.rb b/lib/puppet/parser/functions/delete_values.rb
new file mode 100644
index 0000000..f6c8c0e
--- /dev/null
+++ b/lib/puppet/parser/functions/delete_values.rb
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+module Puppet::Parser::Functions
+ newfunction(:delete_values, :type => :rvalue, :doc => <<-EOS
+Deletes all instances of a given value from a hash.
+
+*Examples:*
+
+ delete_values({'a'=>'A','b'=>'B','c'=>'C','B'=>'D'}, 'B')
+
+Would return: {'a'=>'A','c'=>'C','B'=>'D'}
+
+ EOS
+ ) do |arguments|
+
+ raise(Puppet::ParseError,
+ "delete_values(): Wrong number of arguments given " +
+ "(#{arguments.size} of 2)") if arguments.size != 2
+
+ hash, item = arguments
+
+ if not hash.is_a?(Hash)
+ raise(TypeError, "delete_values(): First argument must be a Hash. " + \
+ "Given an argument of class #{hash.class}.")
+ end
+ hash.dup.delete_if { |key, val| item == val }
+ end
+end