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