Coding & Skills
364 articles in this topic
Problem Representation in AI: State Space, Worked Water-Jug Example and Exam Traps
Learn how states, operators, goals and costs turn a verbal task into a search problem. The worked water-jug trace separates valid states from reachable ones.
Updated 23 Oct 20265 min readML & Data Science
Regular Expressions in JavaScript: Match, Extract, Replace, and Validate
Learn JavaScript regex by tracing what each token consumes. Build a validator and a named-group log parser, then practise extraction, replacement, flags, and common traps.
Updated 23 Oct 20265 min readWeb Development
Polymorphism in Java: Overloading, Overriding and Runnable Examples
Learn how Java chooses overloaded methods at compile time and overridden methods at runtime. Trace two complete programs, common traps and practice targets.
Updated 22 Oct 20266 min readJava
Decorators in Python: @ Syntax, Wrappers and Worked Examples
Understand when decoration happens, what a wrapper receives, and how return values travel back. Runnable examples cover parameters, stacking and built-ins.
Updated 22 Oct 20266 min readPython
Tree Data Structure: Types, Traversals and a Worked BST Example
Build one nine-node binary search tree, classify its shape, trace four traversals, and work through insertion, search, deletion and complexity checks.
Updated 21 Oct 20266 min readDSA & Algorithms
Classes and Objects MCQs: 12 Solved OOP Questions with Explanations
Solve 12 classes and objects MCQs, check each explanation, and use a worked Java trace to separate instance state, constructors, overloading and nested classes.
20 Oct 20267 min readProgramming Languages Survey
C++ Object Lifetime and Storage Duration: Trace Construction, Destruction, and Dangling State
Learn to separate scope, storage duration, lifetime, and ownership. Trace seven objects precisely, then repair dangling pointers, references, and views.
Updated 19 Oct 20265 min readC++
Foundations and Evolution of AI: Approaches, Timeline and a Worked Rational-Agent Example
Build a connected map of AI foundations, historical shifts and major paradigms, then calculate how a rational agent chooses under uncertainty.
Updated 19 Oct 20266 min readML & Data Science
Functions and Arrow Functions in JavaScript: Syntax, Scope and Runnable Examples
Build function declarations, expressions and arrows in JavaScript, then trace parameters, closures, lexical this and array callbacks through exact outputs.
Updated 19 Oct 20266 min readWeb Development
Packages and Access Modifiers in Java: Visibility Rules with Runnable Examples
Learn how Java package boundaries change member visibility. Compile a complete example covering public, protected, package-private and private access.
Updated 18 Oct 20265 min readJava
Exceptions in Python: Handle Errors with try, except and finally
Learn how Python exceptions change control flow, how to catch expected failures without hiding bugs, and when to use else, finally, raise, and custom exceptions.
Updated 18 Oct 20265 min readPython
Graphs in Data Structures: Complete Guide with BFS, DFS and Dijkstra Worked Examples
Learn graph terminology, representations and algorithm selection by tracing one unweighted graph with BFS and DFS, then solving a weighted graph with Dijkstra.
Updated 17 Oct 20266 min readDSA & Algorithms