Coding & Skills
365 articles in this topic
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
Error Handling in JavaScript: try, catch, throw and Async Examples
Learn where JavaScript errors cross a boundary, then handle parsing, validation, timers and failed async work through one runnable inventory example.
Updated 17 Sep 20266 min readWeb Development
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
Greedy Algorithms for GATE CS: Concepts, Worked Examples, and Where Greedy Fails
Learn when a greedy choice is provably correct, trace Kruskal step by step, and use numeric counterexamples to see why the same idea fails for coin change and 0/1 knapsack.
Updated 16 Sep 20266 min readDSA & Algorithms
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++
Unsupervised Learning and Clustering Explained: K-Means Worked Example and Exam Traps
Build intuition for unlabelled data, then follow k-means from assignment to updated centroids and SSE. Compare medoids, hierarchical clustering, DBSCAN and neural representations.
Updated 15 Sep 20265 min readML & Data Science
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
this Keyword in JavaScript: Call-Site Rules with Worked Examples
Trace JavaScript receivers through ordinary functions, arrows, callbacks, constructors, call, and bind. Worked examples turn this from a guess into a call-site rule.
Updated 15 Sep 20265 min readWeb Development
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
Python Classes and Objects Tutorial: Build a Student Model Step by Step
Build one Student class, create independent objects, and trace every value. The examples show how constructors, methods, and attribute lookup work in Python.
Updated 15 Sep 20265 min readPython