Puppet Function: delete_at

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

Overview

delete_at()Any

Deletes a determined indexed value from an array.

Examples:

delete_at(['a','b','c'], 1)

Would return: ['a','c']

Returns:

  • (Any)


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# File 'modules/stdlib/lib/puppet/parser/functions/delete_at.rb', line 5

newfunction(:delete_at, :type => :rvalue, :doc => <<-DOC
  Deletes a determined indexed value from an array.

  *Examples:*

      delete_at(['a','b','c'], 1)

  Would return: ['a','c']
DOC
           ) 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) && !index.match(%r{^\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