B4J Tutorials

[PyBridge] Linear regression with scikit learn

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[PyBridge] Tips to make life easier

1, Download VSCode to edit the Python source files (you get hints etc)
2, Put the Python source code in files directory. (set external tool to VSCode for easy editing)
3, Run the code from...
 
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MathArt

Sure you will figure it out. Four rotating/pivoting arms of different length and rotating at different speeds (some CW and some CCW) to make all kinds of interesting drawings. Change the speed /...
 

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HTMX+Bootstrap5+MiniHTML+WebApiUtils+Server

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  • MiniHtml.b4xlib
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  • htmx-b4x.zip
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Tip : B4XLib documentation

I recently spent half a day on a wild goose chase trying to find out what was going on with SQLCipher, while the issue turned out to be B4XTable.b4xlib containing an #AdditionalJar for...
 
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Trace of a point on a rolling wheel

 

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Run B4J java and javafx UI Applications on Linux ARM32, ARM64 & Intel/AMD Computers and VPSs

To run a B4J console or GUI Application on any 32-bit or 64-bit ARM computer, follow these steps:

Have tested it on Raspberry Pi 4 and Orange Pi Zero 3, 2W running Ubuntu 21.04 and 22.04...
 
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Using MiniORMUtils in Web API Server v3

Introduction
At the time of writing, MiniORMUtils is version 1.14 and Web API Server v3 is version 3.00.
MiniORMUtils support SQLite and MySQL databases.
We don't need to write...
 
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Google Image Downloader (using Pnd_Selenium Library)

Hi there,

I am sharing my example Google Image Downloader using Selenium and to be more specific Pnd_Selenium lib (from Pendrush) that you can find here...
 

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[WebApps] Using Laragon as your development web server

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[Web] Plug n Play MySQL Database Authentication via PHP REST API in 5 minutes or less

Hi Fam

Download

You will recall that we did a tutorial on MySQL back-ends using a plug n play CRUD REST API (Related Topics below)

This is based on this GitHub Project

In this...
 
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Web API Server v3

Part #1: Get Started
Part #2: Configure Settings
Part #3: How Does the Project Work?
Part #4: Server Handlers
Part #5: Using Code Snippets
Part #6: Add a New Field

Part #1: Get Started...
 
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Styling buttons with CSS

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See whether (and where) circles intersect

Using B4XCanvas and DrawCircle, and geometry laws, we can test whether two given circles intersect or not.
If they intersect the points of intersections are returned.

Circle Equations​

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[B4X] Measure Line Lengths and Intersection Angles - Draggable Points



This post is partly in response to

[SOLVED] Application capable of measuring angles and distances.

I need to develop an application capable of measuring angles and distances. It can be for B4J or B4A. I prefer B4J. I have attached some image that shows more or less what I need initially. As the red dot is moved the measurements changes together. The crane arm is aticulated, and follows the...
www.b4x.com

The attached project is a very short...
 

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  • measure2X.zip
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[Web][SithasoDaisy] Mastering the TailwindCSS Grid

Hi Fam

In this video, we learn about the grid, and how we can add rows and columns and set them to different sizes in order to place components when designing our UI.

In the abstract designer...
 
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A flat version of Rubik's Cube

It is based on this Github Project and used it as inline Java code. Have modified the original Java code a bit to allow for scrambling of the cube from within B4J and then to solve it...
 

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  • b4jRubikCube.zip
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[BANano] New tools for debugging remote devices in 9.05

We recently had a particular problem with a BANano Webapp running on a phone from a client which we could not reproduce on any of our devices. It was impossible for us to have this device in our...
 
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[ABMaterial] ABMNavigationBar changes in 1.08

I'm writing the last changes on v1.08. Still have to do some cleanup and updating the demo, but the release is near...

I got a couple of requests for the Navigation Bar since the first...
 
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[B4X]Convert Complex Structures of Lists and Maps to YAML Strings: can also be used to convert JSON to YAML.

[B4X]Convert Complex Stuctures of Lists and Maps to YAML Strings: can also be used to convert JSON to YAML.

In my endless pursuit of knowledge, I have been experimenting with VPS servers.
I came...
 

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  • toYaml3.zip
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