37 lines
825 B
Ruby
37 lines
825 B
Ruby
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#
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# difference.rb
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#
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module Puppet::Parser::Functions
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newfunction(:difference, :type => :rvalue, :doc => <<-EOS
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This function returns the difference between two arrays.
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The returned array is a copy of the original array, removing any items that
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also appear in the second array.
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*Examples:*
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difference(["a","b","c"],["b","c","d"])
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Would return: ["a"]
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EOS
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) do |arguments|
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# Two arguments are required
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raise(Puppet::ParseError, "difference(): Wrong number of arguments " +
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"given (#{arguments.size} for 2)") if arguments.size != 2
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first = arguments[0]
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second = arguments[1]
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unless first.is_a?(Array) && second.is_a?(Array)
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raise(Puppet::ParseError, 'difference(): Requires 2 arrays')
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end
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result = first - second
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return result
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end
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end
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# vim: set ts=2 sw=2 et :
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