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Re: Random function [message #180574 is a reply to message #180551]

Wed, 27 February 2013 11:17

Markus Grob
Messages: 9
Registered: September 2011

Karma:

Junior Member

Salvatore schrieb:
> On 2013-02-25, sonnichjensen(at)gmail(dot)com <sonnichjensen(at)gmail(dot)com> wrote:
>> I use the rand function to get 10 items of 1808 current itemes.
>
> If you want ten random items from an array, you could try the following:
>
> <?php
> // This is the big array you're pulling something out of.
> $lotsOfItems = array( /* ... */ );
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
....

Sorry, but this line is the problem, which every pseudo random generator
has. What will you fill in here. What is really different. Do you have
anything, that's changing in an order, you couldn't tell?
If you choose the time, then you have a changing startvalue, but the
calculating is always the same, so that you can say, what the results
will be.
If you choose keyboardinputs, then you may have no input so you will
have an empty seed.
You can mix it (like every pseudo random generator does) and try to
calculate in a way, that a user can't tell, what the result will be, but
you will never have a random seed, so you will never have a random
calculation.
You can try to choose chaotic elements, but you have to fill them in
your array without loosing the chaotic element ;-)

Greetings from Switzerland, Markus

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[Message index]

		Random function By: Sonnich Jensen on Mon, 25 February 2013 20:48
		Re: Random function By: Salvatore on Mon, 25 February 2013 20:57
		Re: Random function By: Luuk on Mon, 25 February 2013 21:13
		Re: Random function By: Jerry Stuckle on Mon, 25 February 2013 21:42
		Re: Random function By: The Natural Philosoph on Mon, 25 February 2013 22:12
		Re: Random function By: Robert Heller on Tue, 26 February 2013 01:46
		Re: Random function By: Jerry Stuckle on Mon, 25 February 2013 21:39
		Re: Random function By: The Natural Philosoph on Mon, 25 February 2013 22:11
		Re: Random function By: Salvatore on Mon, 25 February 2013 22:42
		Re: Random function By: M. Strobel on Tue, 26 February 2013 10:18
		Re: Random function By: Paul Herber on Tue, 26 February 2013 13:52
		Re: Random function By: Markus Grob on Wed, 27 February 2013 11:17
		Re: Random function By: Thomas 'PointedEars' on Wed, 27 February 2013 23:22

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