FAQ Section: Lists

Frequently Asked Questions
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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
Google sheet data sort
List with Tags?
I need help to fix this code
Suggestions for Dictionnaries
Preparing and selecting received content from mysql DB
Ordered list ASAP!
Its possible to make list view with auto sort A-Z from sheet data
Problem about counting integral
Download Multiple Files with subfolders
Sorting listpicker items
Checking 4 bytes to mark beginning and end of a data packet on incoming bluetooth data
How do you share history details (table) file from Tiny DB?
How do I make a voice alert message using ardiuno uno software and mit app inventor?
Help: how do you display graph from web in mit app inventor?
Breaking up a lists of lists into separate lists
Hex To Decimal Conversion Issues
Is there any extension or tool for dynamic quiz/exam/survey generation
Update scoreboard using dictionary
Preciso de ajuda em um sistema de agendamento
Turning Ranked Numbers Into Word Tags
Turning Ranked Numbers Into Word Tags
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
Text saved to check box
New Order - App inventor
Sort CloudDB values
Help displaying list information in seperate fields and amending to it
Top 5 Leaderboard?
How do I sort a list?
Mass changing arrangements
Populate a tableview from textfile containing a list of names
I need help with code
How can I create Text Boxes based on a user's input?
Turning a list into a sublist
Word typed in textbox appears backward (OLLEH, instead of HELLO)
Retrieve data from Firebase and display in listpicker
Lispicker Elements From String and Selection boxes
How do I use variable values as component names in blocks
Homework: Python procedure algorithms in App Inventor
Call element index from list of list
Got my companion app working, why am I getting the [""]
Recording and Saving ECG Sensor Data from Bluetooth Low Energy Arduino
Lists, two-dimensional arrays, indexes and passing parameters
Code explanation
[Help] - List of Lists
Java.lang.stackoverflowerror problems
Blurry image Problem
How do I generate random numbers in buttons without them overlapping?
BLE App displaying array data
Google sheet + app inventor for calculation
Notifier after text input help
Listview clicking
Save two lists to tdb
Text in label enclosed with square brackets
Broken Doc Link in List Blocks
Setting keys from firebase into a dictionary
Can you break or single step code
Sending realtime data EMG to my Android via BluetoothLE
Bad arguments to remove list item
Program will not compile, DX execution failed
Display different chart on different button
Game mode selection
How do I start displaying random values(indexes) from a list one after another
Clearing content from a table when using Screen1.BackPressed
How do I create a black jack game?
Dynamic Tables in App Inventor using WebViewer and HTML
How do I create a sequential timer?
How do you update total after tap delete?
I need to learn how to build normal apps
Help me "password creation app"
Why ListPicker can not work?
Error code and wont save list
How do I make a shuffle function?
Error al descargar apk
Number in list Error
How do you transfer an item in a list to another list without replacing the old data in the new list from another screen?
Want to make an app to help organize and record data regarding my services to farmers
Select specific data from CSV file based on today's current date
How do you activate different types of blocks?
App to track habits
How do you get specific value from responseContent?
Looking for help with water tracking app
Who can solve this error 503 in the App; mac adress not valid HC-05 Module
Translating multiple text boxes and buttons
Need help using listview and chatbot
Text box text adds [" "] when it pulls from Google Sheet
Random component not working?
Why player and sound played right after opening the app
How do you change a variable within a loop?
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
Display text from list without '' " or []
Listpicker sublist not saving
HELP PLS! Map Tour App - adding markers in blocks and text to speech with their titles
How do you place words of string into list?
How do I make a list of "things" I can "thing.doStuff()" with? (idk correct terms, apologies)
String too long for list? - TinyDB issue
How do I Store Favorit's Buttons for Later Use - Re-Opening the App?
How do you reorder a list with values stored in a dictionary?
TinyDB and List problem
I want to filter how many data are in the spreadsheet
Exchange information between screens
Lookup table of a different type
Put text file in listView
How can I sync two lists ? (BubbleSort)
Separar elemento de una lista
Movement path drawing
Problem multiple choice questions
Workout Creator
Add Row Automatically
Application problems!
ESP32 sends data at same place
Variables data store and display
Runtime Error: The list cannot get item number 2 of list length 1!
Im pulling my hair out need help with BLE im sure im doing something daft
I need help creating a randomized list of songs
How do I get a complete list?
Listview Data Problem ( I cant write listview datas to other labels except my first label)
Error loading list data
Tensor multiplication
How do you make a library management app?
Button allowing user to add listpicker field
Sort List alpha-numerically, ignoring Capitals
Dynamically add labels in for loop
How do I sort a list of addresses by index number?
Add new buttons and sections dynamically
Filter Data in List View?
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?
I want to show three photos one by one and navigate with next, previous and home keys
Error in scheduling app
How do you create labels?
I need the data entered in the 3 textboxes in 1 listview in 1 line
get data by comparing the current time with data from a table
AP CSP EXAM HELP, my ListPicker isn't working
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?
Download & Share file google sheet
How do you make an item in the store change when you press a key?
School room app
Warehouse counting
Help me solve a randomize list problem
Loops of multiple variables?
Link or tagging content of list variable to another list variable
Using the text on a TextBox to call a variable. Is it possible?
Create graphs with input values from ESP32
Variables swap when I close the Ai2
Complex question with 300 question quiz and display point
Can i get information from a dictionary in a list of checkboxes?
Adding number to the list and the number will save to the firebase database
Load a ListView from Google sheet
How do I create journal entries that are added to listview?
BLE correct UUID + registration
Recreating the Königsberg Bridge Problem in MIT app inventor
Transfer Listpicker tinydb data to new Phone
[Free] Evaluate JavaScript Extension. Math expression. Source code
Add items to list block
Saving to TinyDB & Retrieving the Data
A matching demand and request system using tiny db
Can you show me blocks of how to arrange list view?
Where to find examples for usage of each block type
How can I select a List View item by scanning a QR code that takes the reference from my spreadsheet?
How do you show QR Codes along with names in a list (ListView or other option)?
Question / Help about "replace list item"
Local search engine from excel database?
Looking To convert multiple blocks into one
Need help in making "Notice management" app
Why do i see the row data not the column data
How do you get more than one cell from Google sheets for different labels in APP Inventor?
I want to view a csv and search words from textbox
(not urgent) Can someone help me understand lists?
Project to get to rubbish containers nearby
Same function yields different results on different apps
Help on making a maze with something chasing the character
I am unable to create parsnips and I am out of seeds for planting
Help me for this app (firebase data, media playback)
Sort list picker by time added
I'm getting this runtime error in my app: The operation select list item cannot accept the arguments
Adding new Components using the Blocks Section
Make a new instance with a button
I wanted to do translator using a spinner
Split Text From Google Sheets
If I am right, Mit Ai2 is forcefully adding double quotes and other symbols in the data (eg. numerical data)
Checkbox list with replacement text
How do I Create a Multi-Level Navigation System for an Agriculture App?
I am having problem with finding some blocks
I need helping coding a habit tracking app
Need Help Making my Blackjack game
About minimum, maximum and the middele
How do I pass two or more values to the next screen?
I can't seem to solve this problem. I'm trying to add elements to ListView but it keeps giving this error
Constant errors concerning list item selection and replacement
Available number of variables
Store multi-column CSV as multiple lists
Creating a Shop screen in my project. How would I use the spreadsheet component
I'm getting this runtime error in my app: The operation select list item cannot accept the arguments
How do I upload a csv file to be a list?
Register a negative value in a list
Listview attributes
Ayuda con interruptor (switch)
Unable to delete or load data with Sheets
Need to create a list with the content of the SMS that I can send through the app
Float ArrayNot Working As Expected
Parsing Hex by bytes?
How can i make e clickable once “a” is completed
Creare una turnazione ciclica di 8 persone
Probléme de mélange dans un pulzze
Timer and display data
Facing problems with making an airliner 'Top Trumps' app
How can i make e clickable once “a” is completed
Problema ingresar nuevos campos en listview
BLE broadcast Bytes
Retrieve data from csv very slow and time consuming
Saving and recovering data from tinyDB
BluetoothLE connection, GATT and data
BluetoothLE connection, GATT and data
Error 507:unable to connect.is device turn on?
No carga mi proyecto
Use spinner to sort listview
[FREE] ListUtilz Extension - A Powerful Lists Management Extension
Shopping List App
Error Message: This block needs a value block connected to its socket
How do you list view data to .csv and the some question?
For some reason I can't store a variable in a dictionary value
Get data from a list of lists
Get data from a list of lists
Exportar datos listas paralelas (datos de 6 listas paralelas) a archivo .csv
How can I view what TinyDB is storing
Checkbox to textbox to web
Help please :I want to create a page that displays player rankings
Help With Blackjack App
How do you receive data from the ESP32 for the application?
Importing data from a csv file
How do I set up my map to pull data (from a zipcode or an address)?
App Inventor - Indoor Positioning System?
Arduino signal to Midi
How do I assign a number value on a list picker ( listpicker only has texts on it)?
How do I setup blocks for listview?
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?
Tres desplegables pero que se comuniquen entre si ( Three related ListPickers)
Display list from csv or excel file stored in google drive
How do you display an numerical average of data stored in a tiny db?
How do I make this all into one part, not separated?
How do you make a library management app?
[Help Needed] Basketball 100 Squares Offline Betting App – Almost Complete! Fix Looping on Bettor Input + Add Team Names/Scores + Optional Fixed Bet Amount Post Body:
Help me fix some problem for my Sorting (name and score)
Help me fix some problem for my Sorting (name and score)
Creating an editable and storable monthly table
Save a list of numbers with tinydb
I need to adjust a button in the app
Different output with the same input
How do you store key-value pair data with NO ORDER?
Variable Random Using TinyDB
Color Changing Canvases
Unable to recognize list inside TinyDB dictionary
Apparently I am making a 'war game' using cards, but there are bugs and problems
Multiple Button for Multiple Textboxes: When Button clicked
Avatar creator app
Tab switching code gone wrong
Is this level of sorting and retrieval possible in a database accessible in App Inventor?
Is this level of sorting and retrieval possible in a database accessible in App Inventor?
User add to list
Importing CSV from Google Sheets removes commas
I need to sort the data in the listview by date
Ordinare gli elementi di una lista in base alla data
Lists and variables are confused?
Order 3 differents lists, based on 1 of them
How can I prevent doubles?
"File" Storage Component
Accessing a database
How do I make a randomized list that doesn't pick the same value from a database?
Easier way of Dark Mode on app
Ordenar una lista
Connecting to a specific BLE devicetype using UUID and Name - fails
Reading values from a pre loaded excel file
Refresh chart with bluetooth
JavaScript without Timer and WebViewStringChange
[Urgent Help Needed] Tables from Lists
How do you remove items from a list and then add them back?
Best Practice -- NFL Weekly Scoreboard
Lists in TinyDb
Ordenar numeros introducidos con text box de mayor a menor
Procedures with inputs VS global variables
Need help with split items from list and merge them in another list
Using Lists of Lists for Random Card Shuffles
Timer for recipe
Mit apps keeps reading null value from thingspeak
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?
DESPERATELY NEED ASSISTANCE (Loop)
2 buttons appearing in a random order