Re: how to say "inverse your value" (to a boolean)?

Daevid Vincent wrote:

NO! For the love of God and all that is holy, don't do that accumulator / mod "hack". That's sooooo 1980's. And why make the CPU do all that math for every row... Just do this. It's quick and simple: CSS: .dataRow1 { background-color: #DFDFDF; } .dataRow2 { background-color: #FFFFFF; } foreach ($foo_array as $foo) { ?><tr class="<?= ($dr = !$dr) ? "dataRow1" : "dataRow2" ?>"><td><?= $foo ?></td></tr><?php

Wow, were to start with all the problems in the above code: 1. Short tags? 2. Not using echo or print. You actually recommend breaking in/out of php? 3. Using uninitialized variables (I run with the E_ALL crowd) 4. Using the <tr class=''> and not the <td class=''>... Hmmm

} No need to initialize $dr as by default PHP will make it a boolean "false", then each itteration, it will toggle true/false and substitute the CSS class

-----Original Message----- From: Jim Lucas [mailto:lists@cmsws.com] Sent: Monday, August 10, 2009 4:03 PM To: John Butler Cc: PHP-General List Subject: Re: [PHP] how to say "inverse your value" (to a boolean)? John Butler wrote:

quick Q: I have this inside a foreach{} that I want to alternate

between on and

off so I can alternate the background-color of my <tr>'s. $tableRowBGcolorBoolCounter != $tableRowBGcolorBoolCounter;

//-boolean

on and off I am looking thru' docs and books, but can't remember (nor

find now) in

PHP how to say "inverse your value" (to a boolean). ? TIA! -G

<?php $arr = range(1, 10); $i = 0; foreach ( $arr AS $row ) { $row_color = ( ( $i++ % 2 ) ? 'green' : 'red'); echo $row_color; } ?>

another (neat|strange)+ way I use the above is like so <style> .rowColor0 { background: #FFFFFF; } .rowColor1, .rowColor3 { background: #EEEEEE; } .rowColor2 { background: #DDDDDD; } </style> <?php $arr = range(1, 10); $i = 0; foreach ( $arr AS $row ) { echo '<tr><td class="rowColor'.( $i++ % 4 ).'"'>'.$row.'</td></tr>'; } ?>

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-- Jim Lucas "Some men are born to greatness, some achieve greatness, and some have greatness thrust upon them." Twelfth Night, Act II, Scene V by William Shakespeare