Programming Languages
213 articles in this topic
Preprocessor and Macros in C: Expansion Rules and Worked Examples
Learn what happens before C compilation, expand object-like and function-like macros by hand, and avoid precedence and repeated-evaluation bugs.
Updated 18 Sep 20266 min readC
Java File I/O and NIO Tutorial: Streams, Path, Files, Channels and Buffers
Learn which Java file API to choose, then run one program that writes and reads text, archives a file, traces an 8-byte buffer, and checks exact output.
Updated 18 Sep 20266 min readJava
Python Generators and Iterators Tutorial: yield, next() and Lazy Evaluation
Build Python's iterator protocol from a three-value list, trace generators one request at a time, and practise safe one-pass pipelines with exact outputs.
Updated 18 Sep 20265 min readPython
Rust Tutorial for Beginners: Ownership, Types and a Text Counter
Build a small Rust text analyser and trace what the compiler sees. The example connects basic types and control flow to moves, borrows and owned results.
Updated 17 Sep 20265 min readProgramming Languages Survey
C++ Encapsulation and Class Invariants: Build Objects That Stay Valid
Learn to design a C++ BankAccount that cannot be created or changed into an invalid state. Trace constructor checks, guarded operations, representation leaks, and boundary tests.
Updated 17 Sep 20265 min readC++
Variables and Data Types in C: Declarations, Conversions and Runnable Examples
Learn how C types control stored values, expressions and I/O. Compile a complete marks program, trace its conversions and repair common type mistakes.
Updated 17 Sep 20266 min readC
Methods in Java: Syntax, Parameters, Return Values and Examples
Build and trace a complete Java score program, then learn how arguments, return types, void methods, instance calls and overloads work.
Updated 17 Sep 20265 min readJava
Introduction to Python: Core Concepts, Worked Trace and Exam Patterns
Build a reliable Python tracing method from names and types to loops and mutable lists. Follow one function across every iteration and check its exact output.
Updated 16 Sep 20266 min readPython
Kotlin vs Java for JVM Applications: A Clear Trade-off Guide
Choose between Kotlin and Java using the same Ticket #42 service example, a migration checklist, and a scorecard whose winner changes when team priorities change.
Updated 16 Sep 20266 min readProgramming Languages Survey
C++ deque, list and forward_list: Choose the Right Non-Vector Container
Use one controlled sequence-editing workload to compare deque, list and forward_list. See where search cost, iterator validity and memory locality change the decision.
Updated 16 Sep 20266 min readC++
Unions in C: Syntax, Shared Memory and Worked Examples
A C union reuses one storage region for alternative member types, while a separate enum tag keeps each payload read consistent. Safe member switching prevents stale reads, layout mistakes, and character-array errors.
Updated 15 Sep 20265 min readC
Loops in Java Tutorial: for, while, do-while and Worked Examples
Build one reliable control-flow model for every Java loop. Trace runnable examples, avoid boundary and update errors, and practise counting executions.
Updated 15 Sep 20266 min readJava