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Posted by Jerry Stuckle on 04/18/06 07:17
Bosconian wrote:
> I have an array defined as follows:
>
> $scores[2] = 19;
> $scores[4] = 25;
> $scores[2] = 23;
> $scores[4] = 25;
>
> ... where the key is the team # and the value is the points.
>
> I am outputting the key/values as follows:
>
> foreach ($scores as $team => $points) {
> echo "Team: $team, Points: $points, Difference: " . ($scores[0] -
> $scores[1]) . "<br>";
> $scores = array_reverse($scores, false);
> }
>
> Curent output (before array_reverse):
>
> Game 1
> Team: 2, Points: 19, Difference: 0
> Team: 4, Points: 25, Difference: 6
>
> Game 2
> Team: 2, Points: 23, Difference: 0
> Team: 4, Points: 25, Difference: 2
>
>
> A problem occurs when calculating the point "Difference". The first pass of
> the foreach loop (above) is incorrect, but the second pass is correct
> (below.) This is due from the use of the function array_reverse(). By
> setting the preserve_keys to false, the function changes the structure of
> the array.
>
> Desired output (after array_reverse):
>
> Game 1
> Team: 2, Points: 19, Difference: -6
> Team: 4, Points: 25, Difference: 6
>
> Game 2
> Team: 2, Points: 23, Difference: -2
> Team: 4, Points: 25, Difference: 2
>
>
> Question: how can the above array be structured like this from the start?
>
>
Well, first of all:
$scores[2] = 19;
$scores[4] = 25;
$scores[2] = 23;
$scores[4] = 25;
doesn't work. You have scores[2] contain both 19 and 23, which you can't do.
Secondly, the line:
echo "Team: $team, Points: $points, Difference: " . ($scores[0] -
$scores[1]) . "<br>";
Would always print the difference between $scores[0] and $scores[1] - that is, -6.
So - what's your real code look like?
--
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Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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