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puppet-rsnapshot/lib/puppet/parser/functions/rand_from_array.rb

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module Puppet::Parser::Functions
newfunction(:rand_from_array, :type => :rvalue, :doc => <<-EOS
This function takes either an int or an array as input and returns the int or a
random element from the array
EOS
)do |args|
fail "Must receive two argument." if args.empty?
#++ this works if the input is an array
# return args.sample
# +++++++++++++++++++++++++++++++++++++
# args.flatten!
params = []
params << args[0]
params.flatten!
arr = []
salt = args[1].sum % 60
rnd = Random.new(salt)
# rnd = Random.new()
params.each do |key|
if key.is_a?(String) and key =~ /\d\.\.\d/
k = key.split('..')
r = Range.new(k[0],k[1]).to_a
arr << r
arr.flatten!
elsif key.is_a?(String)
arr << key
arr.flatten!
elsif key.is_a?(Integer)
arr << key.to_s
arr.flatten!
end
end
last_i = arr.length - 1
return arr[rnd.rand(0..last_i)]
end
end