FAQ Section: Lists

Frequently Asked Questions

ABG January 1, 2020, 9:52pm 1

Introductory

Making Lists (Concepts) - MIT

Lists Chapter from MIT AI2 Online book

Translatable copy of Lists Chapter from MIT AI2 Online book

How to work with Lists - imagnity

MIT AI2 List Blocks Help Page

How to Display a List - MIT

nb191 Advanced list blocks (filter, sort, map, reduce)

Tables

Dynamic-editable-html-table - @TimAI2

free-tableviewer-fully-style-customized-to-show-table-data (extension) - @Kevinkun

Dynamic Table Layout and Table Listpicker (HTML) - @Taifun

Dynamic Tables in App Inventor using WebViewer and HTML - @Ghica, ChatGPT

Samples

(See the nb191 advanced list blocks before copying older sort techniques - ABG)

CSV Table to File and Back

How to save Max Scores in TinyDB

How to create a nested List Picker

How to pick a random item from a list without picking duplicates?

How to shuffle lists - @Saj

How to shuffle lists using the nb191 list blocks - @Kevinkun

Merge sort using blocks - ABG

How to sort lists - Italo

How to Sort Lists - Taifun - WebViewer

Lookup in list of Ranges - Amerkashi

Object Manager extension ($) - Jimdo.com

Pairs Library - Scott F

Sort lists by extension ($) - Jimdo.com

Sort Lists in blocks - Sajal

Sort Tables Ascending/Descending by Column in Blocks - ABG

Sort Lists alpha-numericaly, but ignoring Capital letters - Kevinkun

3 Likes

From csv table to tinydb

I need help to fix this code

Google sheet data sort

List with Tags?

Suggestions for Dictionnaries

How do I Create a Multi-Level Navigation System for an Agriculture App?

Arduino signal to Midi

Help me for this app (firebase data, media playback)

Make a new instance with a button

If I am right, Mit Ai2 is forcefully adding double quotes and other symbols in the data (eg. numerical data)

I wanted to do translator using a spinner

Turning a list into a sublist

Checkbox list with replacement text

Sort list picker by time added

Random component not working?

(not urgent) Can someone help me understand lists?

[Free] Evaluate JavaScript Extension. Math expression. Source code

Why do i see the row data not the column data

Add items to list block

BLE correct UUID + registration

Saving to TinyDB & Retrieving the Data

App Inventor - Indoor Positioning System?

Need help in making "Notice management" app

Can you show me blocks of how to arrange list view?

A matching demand and request system using tiny db

How do I create journal entries that are added to listview?

Transfer Listpicker tinydb data to new Phone

Load a ListView from Google sheet

Help on making a maze with something chasing the character

How can I select a List View item by scanning a QR code that takes the reference from my spreadsheet?

Where to find examples for usage of each block type

Recreating the Königsberg Bridge Problem in MIT app inventor

Movement path drawing

Need help using listview and chatbot

How do I assign a number value on a list picker ( listpicker only has texts on it)?

Same function yields different results on different apps

I want to view a csv and search words from textbox

How do you get more than one cell from Google sheets for different labels in APP Inventor?

How do I setup blocks for listview?

Looking To convert multiple blocks into one

Local search engine from excel database?

Question / Help about "replace list item"

Adding number to the list and the number will save to the firebase database

Can i get information from a dictionary in a list of checkboxes?

Display different chart on different button

How do you share history details (table) file from Tiny DB?

Complex question with 300 question quiz and display point

Variables swap when I close the Ai2

Create graphs with input values from ESP32

Loops of multiple variables?

Download & Share file google sheet

I need the data entered in the 3 textboxes in 1 listview in 1 line

Tres desplegables pero que se comuniquen entre si ( Three related ListPickers)

get data by comparing the current time with data from a table

I want to show three photos one by one and navigate with next, previous and home keys

How do I remove the parentheses, quotes and square brackets in the data sent from my esp32 on wifi in json and received in my app in a listview?

Separar elemento de una lista

How can I create Text Boxes based on a user's input?

How do I make this all into one part, not separated?

Using the text on a TextBox to call a variable. Is it possible?

Link or tagging content of list variable to another list variable

Help me solve a randomize list problem

Warehouse counting

School room app

How do you make an item in the store change when you press a key?

AP CSP EXAM HELP, my ListPicker isn't working

How do you create labels?

Error in scheduling app

Google sheet with 3 sheets. I want to view data from Sheet C coloumn wise by different buttons. Is it possible without coding in aapscript?

Display list from csv or excel file stored in google drive

Filter Data in List View?

How do I get a complete list?

Recording and Saving ECG Sensor Data from Bluetooth Low Energy Arduino

Timer for recipe

Refresh chart with bluetooth

Im pulling my hair out need help with BLE im sure im doing something daft

Dynamically add labels in for loop

Put text file in listView

Sort List alpha-numerically, ignoring Capitals

How do I sort a list of addresses by index number?

I need help creating a randomized list of songs

Problem multiple choice questions

How do you display an numerical average of data stored in a tiny db?

How do you make a library management app?

Lookup table of a different type

How do you place words of string into list?

Number in list Error

Text saved to check box

Who can solve this error 503 in the App; mac adress not valid HC-05 Module

How do you activate different types of blocks?

How do I create a sequential timer?

Clearing content from a table when using Screen1.BackPressed

How do I generate random numbers in buttons without them overlapping?

Preciso de ajuda em um sistema de agendamento

Add new buttons and sections dynamically

Button allowing user to add listpicker field

Error loading list data

Listview Data Problem ( I cant write listview datas to other labels except my first label)

Runtime Error: The list cannot get item number 2 of list length 1!

Variables data store and display

ESP32 sends data at same place

Application problems!

Add Row Automatically

Workout Creator

How do I use variable values as component names in blocks

How do I make a shuffle function?

How can I sync two lists ? (BubbleSort)

How do you reorder a list with values stored in a dictionary?

How do I Store Favorit's Buttons for Later Use - Re-Opening the App?

String too long for list? - TinyDB issue

How do I make a list of "things" I can "thing.doStuff()" with? (idk correct terms, apologies)

Lists, two-dimensional arrays, indexes and passing parameters

Ordered list ASAP!

DESPERATELY NEED ASSISTANCE (Loop)

Exchange information between screens

I want to filter how many data are in the spreadsheet

TinyDB and List problem

HELP PLS! Map Tour App - adding markers in blocks and text to speech with their titles

Help me fix some problem for my Sorting (name and score)

Display text from list without '' " or []

Why player and sound played right after opening the app

Mass changing arrangements

BLE App displaying array data

Listpicker sublist not saving

I have created an app for my IOT project by using MIT app inventor, it works fine In AI companion , but when I installed its apk file in my phone then the app is not Starting

How do you change a variable within a loop?

Text box text adds [" "] when it pulls from Google Sheet

Game mode selection

Translating multiple text boxes and buttons

[Help] - List of Lists

Want to make an app to help organize and record data regarding my services to farmers

How do you transfer an item in a list to another list without replacing the old data in the new list from another screen?

Looking for help with water tracking app

How do you get specific value from responseContent?

App to track habits

Select specific data from CSV file based on today's current date

I need to learn how to build normal apps

Error al descargar apk

Help me "password creation app"

Why ListPicker can not work?

Error code and wont save list

Code explanation

How do I start displaying random values(indexes) from a list one after another

Listview clicking

How do I create a black jack game?

Program will not compile, DX execution failed

Bad arguments to remove list item

Sending realtime data EMG to my Android via BluetoothLE

Got my companion app working, why am I getting the [""]

Setting keys from firebase into a dictionary

Can you break or single step code

Save two lists to tdb

Google sheet + app inventor for calculation

Call element index from list of list

Java.lang.stackoverflowerror problems

How do I make a randomized list that doesn't pick the same value from a database?

Broken Doc Link in List Blocks

Text in label enclosed with square brackets

Notifier after text input help

I need help with code

Lispicker Elements From String and Selection boxes

Update scoreboard using dictionary

Homework: Python procedure algorithms in App Inventor

Retrieve data from Firebase and display in listpicker

Best Practice -- NFL Weekly Scoreboard

Word typed in textbox appears backward (OLLEH, instead of HELLO)

Mit apps keeps reading null value from thingspeak

Top 5 Leaderboard?

Help displaying list information in seperate fields and amending to it

Sort CloudDB values

New Order - App inventor

Sorting Tables Ascending and Descending by column contents using Merge Sort

App attempting to access item -1 of a list, I don't get why

User add to list

How do you remove items from a list and then add them back?

Turning Ranked Numbers Into Word Tags

Is there any extension or tool for dynamic quiz/exam/survey generation

Hex To Decimal Conversion Issues

Breaking up a lists of lists into separate lists

Help: how do you display graph from web in mit app inventor?

How do I make a voice alert message using ardiuno uno software and mit app inventor?

Checking 4 bytes to mark beginning and end of a data packet on incoming bluetooth data

Sorting listpicker items

Download Multiple Files with subfolders

Problem about counting integral

Its possible to make list view with auto sort A-Z from sheet data

Preparing and selecting received content from mysql DB

2 buttons appearing in a random order

How do I pick a random text box to put text in? And is it possible to lock the text box so the user can't edit it?

Using Lists of Lists for Random Card Shuffles

Need help with split items from list and merge them in another list

Procedures with inputs VS global variables

Ordenar numeros introducidos con text box de mayor a menor

[Urgent Help Needed] Tables from Lists

JavaScript without Timer and WebViewStringChange

Reading values from a pre loaded excel file

Connecting to a specific BLE devicetype using UUID and Name - fails

Ordenar una lista

Easier way of Dark Mode on app

Accessing a database

"File" Storage Component

Checkbox to textbox to web

How can I prevent doubles?

Order 3 differents lists, based on 1 of them

Lists and variables are confused?

Ordinare gli elementi di una lista in base alla data

I need to sort the data in the listview by date

Importing CSV from Google Sheets removes commas

Is this level of sorting and retrieval possible in a database accessible in App Inventor?

Error Message: This block needs a value block connected to its socket

Shopping List App

Use spinner to sort listview

Error 507:unable to connect.is device turn on?

Problema ingresar nuevos campos en listview

Facing problems with making an airliner 'Top Trumps' app

Need to create a list with the content of the SMS that I can send through the app

Creare una turnazione ciclica di 8 persone

How do I set up my map to pull data (from a zipcode or an address)?

Parsing Hex by bytes?

Float ArrayNot Working As Expected

Available number of variables

I can't seem to solve this problem. I'm trying to add elements to ListView but it keeps giving this error

Creating a Shop screen in my project. How would I use the spreadsheet component

Split Text From Google Sheets

Store multi-column CSV as multiple lists

I need helping coding a habit tracking app

Tensor multiplication

About minimum, maximum and the middele

Need Help Making my Blackjack game

I am unable to create parsnips and I am out of seeds for planting

How do I create an application in App Inventor called CashKeep which contains the ability to save money and find out complete and detailed income and expenses?

Dynamic Tables in App Inventor using WebViewer and HTML

Unable to delete or load data with Sheets

Ayuda con interruptor (switch)

Listview attributes

How do I upload a csv file to be a list?

Constant errors concerning list item selection and replacement

I am having problem with finding some blocks

Adding new Components using the Blocks Section