Why is my ng-if in td having unexpected results? - angularjs

Question

Maybe I am completely confused how td works as I haven't used tables in my code for yeeaars (strong div believer), or maybe I am confused on how ng-if is attempting to separate my data.
Either way, I am not getting my expected results, but there is otherwise nothing wrong with the code, I think my logic is just off.
Here is a working Plunker http://plnkr.co/edit/LoMEMBYc6kUodb9tcbfM?p=preview
<table>
<tr ng-repeat="z in waiverModalLinks">
<td ng-if="z.id=='color'" class="{{z.id}}">{{z.title}}</td>
<td ng-if="z.id==''" class="{{z.id}}">{{z.title}}</td>
</tr>
</table>
The ultimate end result is to have every other td a different color, however I realize that the current logic is going to put the colored td on the left and the non-colored td on the right. But that was the object I was working with before I realized I needed two separate columns, finding the need for a table in the first place.
But anyway, what is not working then is that.. well they are still stacked. I would expect to see the colored td on the left-hand side of the table and the non-colored td on the right-hand side of the table.
Where's the err in my logic?

Answer 1

Your data model seems to be the source of the confusion. You have a simple array, so each td will be in the same row. If you create a 2d array, you can make a new row for each inner array:
$scope.waiverModalLinks =[
[
{title:"1", link:"", id:"color"},
{title:"2", link:"", id:""}
],
[
{title:"3", link:"", id:"color"},
{title:"4", link:"", id:""}
]
];
And a simpler repeater:
<tr ng-repeat="row in waiverModalLinks">
<td ng-repeat="z in row" class="{{z.id}}">
{{z.title}}
</td>
</tr>
Plunkr: http://plnkr.co/edit/VeXBJcf3naI5bRttQ1Pt?p=preview

Answer 2

z.id is either equal to 'color', or an empty string, but can't be both at the same time. So every row will have at most one cell:
if z.id is equal to color, the generated dom will be
<tr ng-repeat="z in waiverModalLinks">
<td class="{{z.id}}">{{z.title}}</td>
<!-- removed second td -->
</tr>
if z.id is equal to ''', the generated dom will be
<tr ng-repeat="z in waiverModalLinks">
<!-- removed first td -->
<td class="{{z.id}}">{{z.title}}</td>
</tr>
You need two cells in every row: one blank and one filled, or vice-versa:
<table>
<tr ng-repeat="z in waiverModalLinks">
<td ng-if="z.id==''"></td>
<td class="{{z.id}}">{{z.title}}</td>
<td ng-if="z.id=='color'"></td>
</tr>
</table>