Puppet Function: unique

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

Summary

This function will remove duplicates from strings and arrays.

Overview

unique() ⇒ Any

Examples:

*Usage*


unique("aabbcc")
Will return: abc

You can also use this with arrays:

unique(["a","a","b","b","c","c"])
This returns: ["a","b","c"]

Returns:

  • (Any) —

    String or array with duplicates removed



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# File 'vendor_modules/stdlib/lib/puppet/parser/functions/unique.rb', line 7

newfunction(:unique, type: :rvalue, doc: <<-DOC
  @summary
    This function will remove duplicates from strings and arrays.

  @return
    String or array with duplicates removed

  @example **Usage**

    unique("aabbcc")
    Will return: abc

    You can also use this with arrays:

    unique(["a","a","b","b","c","c"])
    This returns: ["a","b","c"]

  DOC
) do |arguments|
  if Puppet::Util::Package.versioncmp(Puppet.version, '5.0.0') >= 0
    function_deprecation([:unique, 'This method is deprecated, please use the core puppet unique function. There is further documentation for the function in the release notes of Puppet 5.0.'])
  end

  raise(Puppet::ParseError, "unique(): Wrong number of arguments given (#{arguments.size} for 1)") if arguments.empty?

  value = arguments[0]

  unless value.is_a?(Array) || value.is_a?(String)
    raise(Puppet::ParseError, 'unique(): Requires either array or string to work with')
  end

  result = value.clone

  string = value.is_a?(String) ? true : false

  # We turn any string value into an array to be able to shuffle ...
  result = string ? result.split('') : result
  result = result.uniq # Remove duplicates ...
  result = string ? result.join : result

  return result
end