R language iterate over R object

this will help When you sign up for the site I am in the process of building, you pick whether you want to be a 'user' or a 'worker' and enter your location. For the workers, I want to display all the people trying to use the service('user') in the same location as the worker. I have the following model: , You should do that in your view and then send it to your html:

def home(request):
    if request.user.profile.role == 'WORKER':
        workers_with_same_location = Profile.objects.filter(location=request.user.location, role='WORKER').exclude(id=request.user.id)
        return render(request, 'core/home.html', {'user': request.user, 'other_workers': workers_with_same_location})
    else:
        render(request, 'core/home.html', {'user': request.user})

{% if user.profile.role == 'USER' %}
    <h1>User Account</h1>

{% elif user.profile.role == 'WORKER' %}
    <h1>Worker Account</h1>
    {% for worker in other_workers %}
            <h1>{{ worker.user.username }}</h1>
    {% endfor %}

{% else %}
<h1>Error</h1>
{% endif %}

With these it helps The below is a demo using the video player plugin. Instead of a Map, per Remi's recommendation in the comments to your question above, I created a basic video model with title and controller properties and added them to a List. It's much easier to use a List (with proper models) if you're looking to make a YouTube-like feed (most likely using a ListView or CustomScrollView). Ensure your pubspec.yaml is updated with your video assets (and change the below filenames), and the example should work for you. The listeners below will print when the video is initialized and the duration.

import 'package:flutter/material.dart';
import 'package:video_player/video_player.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Video Player Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Video Player Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<VideoModel> _controllers = [];

  @override
  void initState() {
    super.initState();

    _controllers = [
      VideoModel(
          title: 'Alpha',
          controller: VideoPlayerController.asset('assets/videos/small.mp4')),
      VideoModel(
          title: 'Beta',
          controller: VideoPlayerController.asset('assets/videos/small.mp4')),
      VideoModel(
          title: 'Gamma',
          controller: VideoPlayerController.asset('assets/videos/small.mp4')),
    ];
    _controllerLooper();
  }

  _controllerLooper() {
    for (VideoModel video in _controllers) {
      final listener = () {
        if (video.controller.value.initialized) {
          print('${video.title} - video initialized');
        }
        print('${video.title} duration: ${video.controller.value.position}');
      };
      video.controller
        ..addListener(listener)
        ..setVolume(1.0)
        ..setLooping(true)
        ..initialize();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: ListView.builder(
          itemCount: _controllers.length,
          itemBuilder: (context, index) {
            final controller = _controllers[index].controller;
            return GestureDetector(
              onTap: () {
                if (controller.value.isPlaying) {
                  controller.pause();
                } else if (!controller.value.isPlaying) {
                  controller.play();
                }
              },
              child: AspectRatio(
                aspectRatio: 16.0 / 9.0,
                child: VideoPlayer(_controllers[index].controller),
              ),
            );
          }),
    );
  }
}

class VideoModel {
  VideoModel({this.title, this.controller});

  final String title;
  final VideoPlayerController controller;
}

wish helps you You can expand on what you already did for groups of two, but with one more variable for the third item:

def func(iterate):
    i, j, k = tee(iterate, 3)
    next(j, None)
    next(k, None)
    next(k, None)
    return zip(i, j, k)

l = [1,2,3,4,5]
for a, b, c in func(l):
    print(a, b, c)

1 2 3
2 3 4
3 4 5

Any of those help As far as I know, this currently isn't possible as there's no way to iterate over a string or split a string into a new array by character. I've opened a GitHub issue to request it as an enhancement.
For: