Using ng-if and ng-repeat correctly - angularjs

Question

I have a rudimentary understanding of AngularJS and have a couple (possibly stupid) questions about ng-if and ng-repeat.
If I have a ng-repeat that looks like this:
For all containers without titles, would the ng-repeat produce those containers and not show them? Or do they simply don't exist? The reason I ask is I've tried to replace ng-if with ng-show, but it does not produce the same outcome of "hiding" containers that do not have titles.
Is there a way to code a ng-if to say if the next container has no title, then do something. I tried something like ng-if="item.title=='' && $index+1", without any luck.
Any suggestions?
My data looks like this:
"_sections": [{
"_bootstrap_cells": 6,
"_count": 2,
"visible": true,
"columns": [{
"fields": [{
"name": "type_of_account",
"type": "field"
}, {
"name": "routing_transit_number",
"type": "field"
}]
}, {
"fields": [{
"name": "type_of_payment",
"type": "field"
}, {
"name": "check_digit",
"type": "field"
}]
}],
"caption": "Direct Deposit",
"id": "b456b9d2137ac340177c36328144b0ef"
}, {
"_bootstrap_cells": 12,
"_count": 1,
"visible": true,
"columns": [{
"fields": [{
"name": "account_number",
"type": "field"
}, {
"name": "account_title",
"type": "field"
}, {
"name": "financial_institution_name",
"type": "field"
}]
}],
"caption": "",
"id": ""
}
}]
The first section has two columns and a bootstrap cell value of 6 for each column, the second section only has one column and a bootstrap cell of 12. Since the second doesn't have a caption, I want it to be appended to the first section, but keep both sections' bootstrap formatting.

Answer 1

If containers is an array then it does not have a title property. You need to check the title on each item.
Also note that ng-if will not hide the content, but remove it or not insert it into the DOM. The counterpart of ng-show is ng-hide.
angular.module('appModule', [])
.controller('MyController', [function() {
this.containers = [{
aaa: 1,
title: 'One'
}, {
aaa: 2,
title: ''
}, {
aaa: 3,
title: 'Three'
}]
}]);
angular.bootstrap(window.document, ['appModule'], {
strictDi: true
});
<div ng-controller="MyController as myCtrl">
<div ng-repeat="item in myCtrl.containers track by $index">
<div ng-if="item.title!=''">{{$index}}. {{item.title}}</div>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.7/angular.min.js"></script>