Last change
on this file since 30960 was 30960, checked in by davidb, 8 years ago |
Switch to using Puppet to provision machine. Strongly based on files developed for spark-hdfs cluster
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File size:
825 bytes
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[30960] | 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 of the 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"]) # returns ["b","c"]
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| 12 | intersection(["a","b","c"],[1,2,3,4]) # returns [] (true, when evaluated as a Boolean)
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| 13 |
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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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