Ternary in Laravel Blade to apply row class names - laravel

Question

I have this report that Im trying to do, but I want to make the rows alternate colors. this is what I tried, but it does not work. What is the correct way to achieve this?
<div class="row">
{{$rowOrder = "even"}}
#foreach($data as $row)
{{ $rowLine = ($rowOrder = "odd" ? 'even' : 'odd') }}
<div class="col-sm-4 repColumn {{$rowOrder}}">
<span>{{$row->adm_referraldate}}</span>
<span>{{$row->adm_number}}</span>
</div>
<div class="col-sm-4 repColumn {{$rowOrder}}">
<span>{{$row->dmg_nhsnumber}}</span>
<span>{{$row->dmg_firstname." ".$row->dmg_surname}}</span>
<span>{{$row->dmg_dateofbirth." - (".$row->dmg_ageyears.")"}}</span>
<span>{{$row->dmg_sex}}</span>
</div>
<div class="col-sm-4 repColumn {{$rowOrder}}">
<span>{{$row->dmg_nhsnumber}}</span>
<span>{{$row->dmg_firstname." ".$row->dmg_surname}}</span>
<span>{{$row->dmg_dateofbirth." - (".$row->dmg_ageyears.")"}}</span>
<span>{{$row->dmg_sex}}</span>
</div>
#endforeach
</div>

Answer 1

Replace
{{ $rowLine = ($rowOrder = "odd" ? 'even' : 'odd') }}
with
<?php $rowOrder = ($rowOrder == "odd") ? 'even' : 'odd'; ?>
or if you are using a Laravel 5.2 or up
#php($rowOrder = ($rowOrder == "odd") ? 'even' : 'odd')
Do the same for the line {{$rowOrder = "even"}}
If you used the {{$rowOrder = "even"}} it will echo out the result.

Answer 2

You can use modulo arithmetic to decide whether and index is odd or even:
$isEven = index % 2
If you combine this with a PHP ternary operator then you'd get this
{{ $loop->index % 2 ? 'odd': 'even' }}
see
https://davidwalsh.name/php-shorthand-if-else-ternary-operators
and
https://en.wikipedia.org/wiki/Modular_arithmetic

Answer 3

Here's a very easy solution:
#php $count = 0; #endphp
#foreach($data as $row)
<div class="{{ ++$count % 2 ? 'odd': 'even' }}">
{{ $row->name }}
</div>
#endforeach

Answer 4

Use variable $loop documentation ( $loop->even laravel 5.8, or ($loop->iteration % 2)laravel< 5.8 )
#foreach ($users as $user)
#if ($loop->even)
This is even.
#else
#endif
#endforeach
or
#foreach ($listObject as $Object)
<tr class="{{ ($loop->iteration % 2) ? 'odd' : 'even' }}">
#endforeach

Answer 5

{{ $rowLine = ($rowOrder = "odd" ? 'even' : 'odd') }}
possibly should be
{{ $rowLine = ($rowOrder == "odd" ? 'even' : 'odd') }}

Answer 6

Here's a working example for me: I left the dump output in it so you can see the actual number counting up. Hope it helps anyone who comes across this problem :). EDIT: Don't forget to add colors in your css file for .odd and .even!
#if(!empty($names))
{{-- SET VARIABLE + HIDE IT --}}
<div class="hide">{!! $number = 0 !!}</div>
#foreach($names as $n)
{{ dump($number) }}
<div class="{!! $number % 2 == 0 ? 'odd' : 'even' !!}">
{{-- UP VARIABLE + HIDE IT --}}
<div class="hide">{!! $number++ !!}}</div>
{{-- DISPLAY CONTENT —}}
{{ $n }}
</div>
#endforeach
#endif

Answer 7

Try getting the key from the foreach loop and run ($key % 2)
Basically Odd Number mod 2 always have a remainder
#foreach ($rows as $key => $row)
<div class="#if ($key > 0 && $key % 2) odd #else even #endif">
</div>
#endforeach