Programming Techniques

Python

• AI agents with LangGraph: A working example
• Enforced Tkinter-validating with JSON
• Free-standing message box, popup, & Tkinter tricks
• Turn a time-zone string into local time: Python
• PyScript in HTML: A working example

C++

• vector of abstract-base-class unique_ptr as data member
• Error LNK2019 unresolved external symbol due to forward declaration
• bad allocation or vector too long with C++ containers as template parameter
• Implementing C++ reusable mathematical procedures

C/C++ with Python, Java, C#

• Python directly calls C functions Linux
• Python directly calls C functions
• Java directly calls C functions
• C# directly calls C functions
• Use C++ to code Py-method for Python

Software Engineering

• What can be wrong with code written by AI: Part 1?
• What can be wrong with code written by AI: Part 2?
• What can be wrong with code written by AI: Part 3?
• AI agents vs traditional apps: A quick comparison
• Will software developers be replaced by LLM-AI?
• Can Python outperform C++?
• Python parallel entanglement: A C++ solution
• Does free threading solve parallel entanglement?
• Python parallel entanglement: Final note

My FREE Apps for You

Dev Apps

• Edit markdown files in a browser [Click & bookmark]
• View markdown files via a browser [Click & bookmark]
• Test HTML files on your own Windows PC

Dev Know-how

• CMake with Visual Studio 2026: Working samples and guide
• How to debug C++ compiling errors pointing to standard library headers in Visual Studio?
• Self-sign certificate on Windows11: A working guide
• Use GitHub as a free web server
• Link free frii.site domain to GitHub pages

Office Apps

• Manage your life events
• Merge docx and/or pdf files into one pdf
• Share your folder on LAN via a browser

FUN Apps

• Take a long screenshot of a multiple-page webpage
• Convert Gregorian date to/from Chinese lunar date

Finance Apps

• Pricing options on phone
• Pricing convertible bonds on phone
• A unifying option pricing App
• A C++ convertible bond pricing App