Puppet Function: intersection

Defined in:
puppet/modules/stdlib/lib/puppet/parser/functions/intersection.rb
Function type:
Ruby 3.x API

Overview

intersection() ⇒ Any

This function returns an array of the intersection of two.

Examples:

intersection(["a","b","c"],["b","c","d"])  # returns ["b","c"]
intersection(["a","b","c"],[1,2,3,4])      # returns [] (true, when evaluated as a Boolean)

Returns:

  • (Any) 


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# File 'puppet/modules/stdlib/lib/puppet/parser/functions/intersection.rb', line 6

newfunction(:intersection, :type => :rvalue, :doc => <<-EOS
This function returns an array of the intersection of two.

*Examples:*

  intersection(["a","b","c"],["b","c","d"])  # returns ["b","c"]
  intersection(["a","b","c"],[1,2,3,4])      # returns [] (true, when evaluated as a Boolean)

  EOS
) do |arguments|

  # Two arguments are required
  raise(Puppet::ParseError, "intersection(): Wrong number of arguments " +
    "given (#{arguments.size} for 2)") if arguments.size != 2

  first = arguments[0]
  second = arguments[1]

  unless first.is_a?(Array) && second.is_a?(Array)
    raise(Puppet::ParseError, 'intersection(): Requires 2 arrays')
  end

  result = first & second

  return result
end