question_variant_pseudorandom_no_repeats_strategy Class Reference

A question_variant_selection_strategy that is effectively random for the first attempt, and then after that cycles through the available variants so that the students will not get a repeated variant until they have seen them all. More...

Inheritance diagram for question_variant_pseudorandom_no_repeats_strategy:

Public Member Functions
	__construct ($attemptno, $userid=null, $extrarandomness='')
	Constructor. More...
	choose_variant ($maxvariants, $seed)

Protected Attributes
int	$attemptno
	the number of attempts this users has had, including the curent one.
string	$extrarandomness = ''
	extra input fed into the pseudo-random code.
int	$userid
	the user id the attempt belongs to.

Detailed Description

A question_variant_selection_strategy that is effectively random for the first attempt, and then after that cycles through the available variants so that the students will not get a repeated variant until they have seen them all.

Copyright

2011 The Open University

License

http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

Constructor & Destructor Documentation

__construct()

question_variant_pseudorandom_no_repeats_strategy::__construct	(		$attemptno,
			$userid = null,
			$extrarandomness = ''
	)

Constructor.

Parameters

int	$attemptno	The attempt number.
int	$userid	the user the attempt is for (defaults to $USER->id).

Member Function Documentation

choose_variant()

question_variant_pseudorandom_no_repeats_strategy::choose_variant	(		$maxvariants,
			$seed
	)

Parameters

int	$maxvariants	the num
string	$seed	data that can be used to controls how the variant is selected in a semi-random way.

Return values

int	the variant to use, a number betweeb 1 and $maxvariants inclusive.

Implements question_variant_selection_strategy.

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The documentation for this class was generated from the following file:

• question/engine/lib.php