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Re: Shuffle problem [message #182999 is a reply to message #172196]

Wed, 02 October 2013 02:02

Lew Pitcher
Messages: 60
Registered: April 2013

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On Monday 30 September 2013 03:26, in comp.lang.php, "richard"
<noreply(at)example(dot)com> wrote:

> On my site I want to create a play list that is randomly selected when the
> page is loaded.
> I have ten tables, each with 100 rows.
> I want to extract the first 20 rows from each table.
> Then shuffle that and create the list.
> Somehting similar to shuffling a deck of cards.
>
> So that my playlist might look like:
>
> 1965 #4
> 1963 #13
> 1969 #18
> 1961 #10
> 1960 #3
>
> What ways can I do this?

$numbers = range(1, 200);
shuffle($numbers);
foreach ($numbers as $number)
{
$seq = $number % 20;
$year = 1950 + floor($number / 20);
printf("%4u #%d<br/>",$year,$seq);
}

--
Lew Pitcher
"In Skills, We Trust"
PGP public key available upon request

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[Message index]

		Shuffle problem By: richard on Mon, 30 September 2013 07:26
		Re: Shuffle problem By: Denis McMahon on Mon, 30 September 2013 10:18
		Re: Shuffle problem By: Erwin Moller on Mon, 30 September 2013 13:48
		Re: Shuffle problem By: Scott Johnson on Mon, 30 September 2013 22:24
		Solved my shuffle problem! By: richard on Mon, 30 September 2013 18:52
		Re: Shuffle problem By: Lew Pitcher on Wed, 02 October 2013 02:02

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