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37
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1 #
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2 # intersection.rb
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3 #
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4
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5 module Puppet::Parser::Functions
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6 newfunction(:intersection, :type => :rvalue, :doc => <<-EOS
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7 This function returns an array an intersection of two.
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8
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9 *Examples:*
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10
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11 intersection(["a","b","c"],["b","c","d"])
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12
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13 Would return: ["b","c"]
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14 EOS
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15 ) do |arguments|
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16
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17 # Two arguments are required
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18 raise(Puppet::ParseError, "intersection(): Wrong number of arguments " +
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19 "given (#{arguments.size} for 2)") if arguments.size != 2
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20
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21 first = arguments[0]
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22 second = arguments[1]
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23
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24 unless first.is_a?(Array) && second.is_a?(Array)
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25 raise(Puppet::ParseError, 'intersection(): Requires 2 arrays')
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26 end
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27
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28 result = first & second
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29
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30 return result
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31 end
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32 end
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33
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34 # vim: set ts=2 sw=2 et :
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