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# frozen_string_literal: true
#
# concat.rb
#
module Puppet::Parser::Functions
newfunction(:concat, type: :rvalue, doc: <<-DOC
@summary
Appends the contents of multiple arrays into array 1.
@example Example usage
concat(['1','2','3'],'4') returns ['1','2','3','4']
concat(['1','2','3'],'4',['5','6','7']) returns ['1','2','3','4','5','6','7']
> *Note:*
Since Puppet 4.0, you can use the `+`` operator for concatenation of arrays and
merge of hashes, and the `<<`` operator for appending:
`['1','2','3'] + ['4','5','6'] + ['7','8','9']` returns `['1','2','3','4','5','6','7','8','9']`
`[1, 2, 3] << 4` returns `[1, 2, 3, 4]`
`[1, 2, 3] << [4, 5]` returns `[1, 2, 3, [4, 5]]`
@return [Array] The single concatenated array
DOC
) do |arguments|
# Check that more than 2 arguments have been given ...
raise(Puppet::ParseError, "concat(): Wrong number of arguments given (#{arguments.size} for < 2)") if arguments.size < 2
a = arguments[0]
# Check that the first parameter is an array
raise(Puppet::ParseError, 'concat(): Requires array to work with') unless a.is_a?(Array)
result = a
arguments.shift
arguments.each do |x|
result += (x.is_a?(Array) ? x : [x])
end
return result
end
end
# vim: set ts=2 sw=2 et :
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