Problem with random array

[noone]

hello all.
I am using this code to randomly select one value from an array.

srand ();
$rec = array("1","2"," 3","4","5","6") ;
$rec = $rec[rand(0,count($r ec))];
print $rec;

problem is, is sometimes it returns nothing. can anyone see how
to make this so it always selects something.

thanks.

[Sami Haaramo]

noone wrote:

hello all.
I am using this code to randomly select one value from an array.

srand ();
$rec = array("1","2"," 3","4","5","6") ;
$rec = $rec[rand(0,count($r ec))];
print $rec;

problem is, is sometimes it returns nothing. can anyone see how
to make this so it always selects something.

thanks.

Try $rec = $rec[rand(0,count($r ec)-1)];

-Sami

[Tyrone Slothrop]

On Fri, 27 Jun 2003 16:25:52 -0800, "noone" <no***@nowhere. com> wrote:

hello all.
I am using this code to randomly select one value from an array.

srand ();
$rec = array("1","2"," 3","4","5","6") ;
$rec = $rec[rand(0,count($r ec))];
print $rec;

problem is, is sometimes it returns nothing. can anyone see how
to make this so it always selects something.

thanks.

How about a do... while statement?

do {
$rec = $rec[rand(0,count($r ec))];
} while ($rec = "");

[KIPAX]

On Fri, 27 Jun 2003 16:25:52 -0800, "noone" <no***@nowhere. com> wrote:

hello all.
I am using this code to randomly select one value from an array.

srand ();
$rec = array("1","2"," 3","4","5","6") ;
$rec = $rec[rand(0,count($r ec))];
print $rec;

problem is, is sometimes it returns nothing. can anyone see how
to make this so it always selects something.

count($rec) returns 6 because there are 6 elements

rand(0,count($r ec)) starts from 0 to count($rec) ie 6
0,1,2,3,4,5,6 is 7 elements.. and you only have 6 :)


--
KIPAX (www.kipax.com)

[Nobody]

Actually, the problem is that you are asking for a random number between 0
and 6. That's 7 possibilities. So one in seven times will reference an
array element that does not exist.

$rec = $rec[rand(0,count($r ec))];

should be:

$rec = $rec[rand(0,count($r ec)-1)];

Jerry


"Tyrone Slothrop" <ts@paranoids.c om> wrote in message
news:fk******** *************** *********@4ax.c om...

On Fri, 27 Jun 2003 16:25:52 -0800, "noone" <no***@nowhere. com> wrote:

hello all.
I am using this code to randomly select one value from an array.

srand ();
$rec = array("1","2"," 3","4","5","6") ;
$rec = $rec[rand(0,count($r ec))];
print $rec;

problem is, is sometimes it returns nothing. can anyone see how
to make this so it always selects something.

thanks.

How about a do... while statement?

do {
$rec = $rec[rand(0,count($r ec))];
} while ($rec = "");