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#
# delete_at.rb
#
module Puppet::Parser::Functions
newfunction(:delete_at, :type => :rvalue, :doc => <<-EOS
Deletes a determined indexed value from an array.
*Examples:*
delete_at(['a','b','c'], 1)
Would return: ['a','c']
EOS
) do |arguments|
raise(Puppet::ParseError, "delete_at(): Wrong number of arguments " +
"given (#{arguments.size} for 2)") if arguments.size < 2
array = arguments[0]
unless array.is_a?(Array)
raise(Puppet::ParseError, 'delete_at(): Requires array to work with')
end
index = arguments[1]
if index.is_a?(String) and not index.match(/^\d+$/)
raise(Puppet::ParseError, 'delete_at(): You must provide ' +
'non-negative numeric index')
end
result = array.clone
# Numbers in Puppet are often string-encoded which is troublesome ...
index = index.to_i
if index > result.size - 1 # First element is at index 0 is it not?
raise(Puppet::ParseError, 'delete_at(): Given index ' +
'exceeds size of array given')
end
result.delete_at(index) # We ignore the element that got deleted ...
return result
end
end
# vim: set ts=2 sw=2 et :
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