AngularJS, Nested array - angularjs

Question

I have a problem with ng-repeat in AngularJs. I have an array of Objects with 3 different keys and one of those keys is an array of objects. So I simply use the ng-repeat for main array like this:
<div class="post-content" ng-repeat="post in nfc.posts track by $index">
...
</div>
Everything is ok. But when I use a nested ng-repeat in this loop, I get nothing. I used before nested ng-repeats a lot and faced no problem. Here is the code:
comments:: {{post.comments}}
<div class="post-comment" ng-repeat="comment in post.comments">
comment: {{comment}}
<img src="{{comment[3]}}" alt="" class="profile-photo-sm" />
<p>
{{comment[4] + ' ' + comment[5]}} {{comment[6]}}
</p>
</div>
The comments:: {{post.comments}} statement shows me the content, but the ng-repeat does not appear to work correctly.
A sample of comments object in browser console is here
Array(3)
0: {
0: 10196,
1: 10325,
2: 62,
3: 0,
4: Sun Feb 18 2018 21: 56: 58 GMT + 0330(+0330),
5: "text",
6: "text",
7: "text",
8: "text",
9: "text",
$$hashKey: "object:96"
}
1: {
0: 10195,
1: 10325,
2: 50,
3: 0,
4: Sun Feb 18 2018 20: 15: 41 GMT + 0330(+0330),
5: "text",
6: "text",
7: "text",
8: "text",
9: "text",
$$hashKey: "object:97"
}
2: {
0: 10194,
1: 10325,
2: 62,
3: 0,
4: Sat Feb 17 2018 12: 36: 39 GMT + 0330(+0330),
5: "text",
6: "text",
7: "text",
8: "text",
9: "text",
$$hashKey: "object:98"
}
This array is Array of arrays and I convert it to Array of objects after I receive it from API.
Where is my mistake?

Answer 1

First mistake I noticed in your code is this totoObject(itm["arrays"]))
$scope.posts.forEach(itm => (itm["comments"] = totoObject(itm["arrays"])));
your code that you provided in plunker says
function toObject(arr) {
var rv = {};
for (var i = 0; i < arr.length; ++i) rv[i] = arr[i];
return rv;
}
change totoObject to toObject
$scope.posts.forEach(itm => (itm["comments"] = toObject(itm["arrays"])));

Answer 2

Try
<img src="{{comment['3']}}" alt="" class="profile-photo-sm" />
comment[3] means that comment is an array and you are trying to access 4th element. Similarly change other uses as well.
Update 1
Check this plunkr. Below were your issues:
Use of totoObject
In your question you have provided array of objects (below code), which isn't the case in your plunkr. So, comment[3] would work just fine.
here (it shows array of objects)
0: {
0: 10196,
1: 10325,
2: 62,
3: 0,
4: Sun Feb 18 2018 21: 56: 58 GMT + 0330(+0330),
5: "text",
6: "text",
7: "text",
8: "text",
9: "text",
$$hashKey: "object:96"
}

Answer 3

Check the demo,
DEMO
var app =angular.module('testApp',[]);
app.controller('testCtrl',function($scope){
$scope.nfc ={};
$scope.nfc.posts = [
{
"Post": {
"Name": "text",
"Family": "text",
"UserName": "text",
"WorkPlace": "text",
"UserImage": "~/Images/User/Thumb1337305170mmkhalilzadeh2018294642.jpg",
"PPic": "~/Images/Post/1337305170502018211044.jpg",
"DSC": "text",
"CF": "text",
"CN": "(Mediastinum)",
"Rate": 0,
"MentionPostID": 0,
"FollowCount": 1,
"UserID": 50,
"Enable": 1,
"UPID": 10325,
"IsFollow": false,
"IsRate": false,
"IsFollowUser": true,
"RegDate": "2018-02-10T21:30:44.000Z"
},
"PostComment": [
[
10196,
10325,
62,
0,
"2018-02-18T18:26:58.000Z",
"text",
"~/Images/User/Thumb1337305170Shahryar201711122149.jpg",
"text",
"text",
"text"
],
[
10195,
10325,
50,
0,
"2018-02-18T16:45:41.000Z",
"text",
"~/Images/User/Thumb1337305170mmkhalilzadeh2018294642.jpg",
"text",
"text",
"text"
],
[
10194,
10325,
62,
0,
"2018-02-17T09:06:39.000Z",
"text",
"~/Images/User/Thumb1337305170Shahryar201711122149.jpg",
"text",
"text",
"text"
]
],
"newCommentText": "",
"comments": [
{
"0": 10196,
"1": 10325,
"2": 62,
"3": 0,
"4": "2018-02-18T18:26:58.000Z",
"5": "text",
"6": "~/Images/User/Thumb1337305170Shahryar201711122149.jpg",
"7": "text",
"8": "text",
"9": "text"
},
{
"0": 10195,
"1": 10325,
"2": 50,
"3": 0,
"4": "2018-02-18T16:45:41.000Z",
"5": "text",
"6": "~/Images/User/Thumb1337305170mmkhalilzadeh2018294642.jpg",
"7": "text",
"8": "text",
"9": "text"
},
{
"0": 10194,
"1": 10325,
"2": 62,
"3": 0,
"4": "2018-02-17T09:06:39.000Z",
"5": "text",
"6": "~/Images/User/Thumb1337305170Shahryar201711122149.jpg",
"7": "ttt",
"8": "ttt",
"9": "ttt"
}
]
}
];
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<body ng-app="testApp" ng-controller="testCtrl">
<div class="post-content" ng-repeat="post in nfc.posts track by $index">
<div class="post-comment" ng-repeat="comment in post.comments">
<img src="{{comment[3]}}" alt="" class="profile-photo-sm" />
<p>
{{comment[4] + ' ' + comment[5]}} {{comment[6]}}
</p>
</div>
</div>
</body>