Interactive Presentations — Facundo Uferer

lesson_01.sh

Algorithms

Variables and Constants

Lesson: Variables and Constants

Constant: fixed value. Variable: value that changes during execution.

[ OPEN → ]

paso_por_valor_y_referencia.c

C

Pass by Value and Pass by Reference

Lesson: Variables, Parameters, and Passing

Discover how C handles memory and pointers.

[ OPEN → ]

tipos_de_datos.c

C

Data Types

Lesson: Data Types

The fundamental types of C: integers, floats, chars, pointers and structs.

[ OPEN → ]

modularidad.c

C

Modularity

Lesson: Modularization — Subprograms and Functions

Subprograms, Functions and Procedures

[ OPEN → ]

funciones.java

Java

Functions and Procedures in Java

Lesson: Methods and Functions in Java

How Java defines and uses functions and procedures.

[ OPEN → ]

arreglos.c

C

Arrays in C

Lesson: One-Dimensional and Multi-Dimensional Arrays

One-dimensional arrays and matrices with visualizations and step-by-step.

[ OPEN → ]

operaciones_arreglos.c

C

Array Operations

Lesson: Array Operations

Traversal, search and insertion in arrays with step-by-step simulations.

[ OPEN → ]

while_loop.c

Algorithms

While step by step

Lesson: While Loop

Simulate a while loop iteration by iteration.

[ OPEN → ]

do_while_loop.c

Algorithms

Do-while step by step

Lesson: Do-While Loop

Visualize the do-while logic step by step.

[ OPEN → ]

for_loop.c

Algorithms

For step by step

Lesson: For Loop

Initialization, condition, block and increment of a for loop.

[ OPEN → ]

nested_for_table.c

Algorithms

Nested for and multiplication table

Lesson: Schematic Programming and Nested Statements

Two nested for loops that complete a multiplication table.

[ OPEN → ]

if_condition.c

Algorithms

If step by step

Lesson: If-Else Statement

Flow of an if line by line.

[ OPEN → ]

if_else_condition.c

Algorithms

If-else step by step

Lesson: If-Else Statement

How the program chooses between if and else.

[ OPEN → ]

switch_case.c

Algorithms

Switch step by step

Lesson: Switch Statement and Code Blocks

Comparison of cases, match and break.

[ OPEN → ]

string_methods.c

C

String step by step

Lesson: Character Strings and Operations

Changes when using strlen, buffers and manual cuts in C.

[ OPEN → ]

string_numbers.c

C

String of numbers step by step

Lesson: Character Strings and Operations

Text concatenation vs real sum with sprintf and atoi.

[ OPEN → ]

strchr_demo.c

C

strchr step by step

Lesson: Character Strings and Operations

How strchr traverses a string and returns a pointer.

[ OPEN → ]

contar_palabras.c

C

Counting words in strings

Lesson: Character Strings and Operations

Traverses a string char by char and counts words when entering text.

[ OPEN → ]

bubble_sort.c

Algorithms

Bubble Sort step by step

Lesson: Array Sorting

Visualize how elements bubble up to their correct positions.

[ OPEN → ]

selection_sort.c

Algorithms

Selection Sort step by step

Lesson: Array Sorting

Find the minimum and place it in its spot.

[ OPEN → ]

insertion_sort.c

Algorithms

Insertion Sort step by step

Lesson: Array Sorting

Insert each element into its correct position within the sorted part.

[ OPEN → ]

arboles_binarios.c

C

Binary Trees step by step

Lesson: Binary Trees

Visualize recursive insertion and in-order traversal in a BST.

[ OPEN → ]

Dispositivos.java

Java

The 4 Pillars of OOP in Java

Lesson: Object-Oriented Programming and its Four Pillars

Abstraction, encapsulation, inheritance and polymorphism with diagrams and interactive demos.

[ OPEN → ]

HolaMundo.java

Java

Basic Concepts, JVM, and Your First Program

Lesson: Basic Concepts and Your First Java Program

Compilation pipeline to bytecode, internal JVM architecture, and anatomy of main().

[ OPEN → ]

TiposDatos.java

Java

Variables, Data Types, and Operators in Java

Lesson: Variables, Data Types, and Operators

The 8 primitive types in memory, implicit/explicit casting, and logical short-circuit simulator.

[ OPEN → ]

ControlFlujo.java

Java

Control Flow: Conditionals and Loops in Java

Lesson: Control Flow and Loops

Animated flowcharts of if/else, modern switch, and the internal anatomy of for, while, and do-while.

[ OPEN → ]

ArraysStrings.java

Java

Arrays and Strings: Memory and the Constant Pool

Lesson: Arrays and String Handling in Java

Contiguous memory, String Constant Pool in Heap, the == vs equals trap, and StringBuilder.

[ OPEN → ]

ClasesObjetos.java

Java

Classes, Objects, and the new Operator Lifecycle

Lesson: OOP Fundamentals: Classes, Objects, and Attributes

Blueprint vs building, 4-step new lifecycle, this pointer, and memory aliasing.

[ OPEN → ]

ConstructoresEncapsulamiento.java

Java

Constructors, Encapsulation, and Reference Leaks

Lesson: Constructors, Access Modifiers, and Getters/Setters

this() delegation, 4 access modifiers matrix, defensive copying, and immutability.

[ OPEN → ]

ArraysDeObjetos.java

Java

Object Arrays: Two Levels of Memory in Java

Lesson: Arrays of Objects: Holding and Iterating Many Instances

The null slot trap, two-step creation, capacity vs size, and aliasing with Heap diagrams.

[ OPEN → ]

HerenciaPolimorfismo.java

Java

Inheritance, Dynamic Method Dispatch, and Polymorphism

Lesson: Inheritance, Polymorphism, and Method Overloading

"Is-a" test, constructor chaining with super(), overloading vs overriding, and the virtual method table (vtable).

[ OPEN → ]

ClasesAbstractasInterfaces.java

Java

Abstract Classes and Interfaces in Java

Lesson: Abstract Classes, Interfaces, and Code Organization

Contracts, hierarchies, default methods, and UML relationships with interactive diagrams.

[ OPEN → ]

ExcepcionesManejoErrores.java

Java

Exception Handling and Robustness in Java

Lesson: Exception Handling and Robustness

Call stack propagation, try-with-resources, and Throwable hierarchy with step-by-step simulations.

[ OPEN → ]

TadListas.java

Java

List ADT: Static vs Dynamic and Linked Nodes

Lesson: The List ADT: Static, Dynamic, and Linked

Abstract contract, contiguous vs dispersed memory, insertion/deletion, and Big-O complexity analysis.

[ OPEN → ]

TadPilasColas.java

Java

Stack (LIFO) and Queue (FIFO) ADTs in Java

Lesson: The Stack and Queue ADTs: Linear Structures

Linear data structures, circular queue with modular arithmetic, and expression balancing simulators.

[ OPEN → ]

CollectionsFramework.java

Java

Java Collections Framework and Generics

Lesson: Java Collections and Generics (JCF)

Full hierarchy, List/Set/Map/Queue families, and internal HashMap anatomy with bucket simulator.

[ OPEN → ]

IteradoresOrdenamiento.java

Java

Iterators, Sorting, and equals/hashCode Contract

Lesson: Iterators, Ordering, and the equals/hashCode Contract

ConcurrentModificationException demystified, Comparator vs Comparable, and HashSet collisions.

[ OPEN → ]

TadArbolesBinarios.java

Java

Binary Trees and BST in Java

Lesson: The Tree ADT: Traversals and Binary Search Trees

DFS/BFS traversals, BST invariant, insert and delete with interactive tree simulator.

[ OPEN → ]

GrafosAlgoritmos.java

Java

Graphs: Matrix, List, BFS, DFS, and Dijkstra

Lesson: Graphs: Matrix, Adjacency List, BFS, DFS, and Dijkstra

Memory representation, BFS/DFS traversals, Dijkstra, and Floyd-Warshall with interactive graph simulator.

[ OPEN → ]

ArchivosPersistencia.java

Java

Files, Serialization, and JAR Packaging in Java

Lesson: Files, Serialization, and JAR Packaging

I/O Decorator Pattern, NIO.2, serialVersionUID, and native packaging with jpackage.

[ OPEN → ]

ConcurrenciaHilosPools.java

Java

Threads, Synchronization, and Virtual Threads in Java

Lesson: Concurrent Programming: Threads, Synchronization, and Pools

Stack vs Heap in JMM, count++ race conditions, synchronized locks, thread pools, and Project Loom.

[ OPEN → ]

AccesoDatosJdbc.java

Java

JDBC, SQL Injection, and Transaction Management

Lesson: Database Access with JDBC and Safe SQL

Driver architecture, Statement vs PreparedStatement, ResultSet cursor, commit/rollback, and HikariCP pools.

[ OPEN → ]

TestingJunitSpringBoot.java

Java

Testing with JUnit 5, Mockito, and Spring Boot Architecture

Lesson: Testing with JUnit and Your First Spring Boot App

Test pyramid, AAA pattern, test doubles isolation (Mockito), and Spring Boot 3-tier architecture.

[ OPEN → ]

AlgoritmiaVerificacionComplejidad.java

Java

Algorithms: Specification, Invariants, and Big-O

Lesson: Algorithms: Specification, Verification, and Complexity

Hoare triples, step-by-step loop invariants, and asymptotic complexity curves.

[ OPEN → ]

ArbolesNAriosVectores.java

Java

N-ary Trees and Vector Representation in Java

Lesson: N-ary trees and vector-based representation

Left-Child Right-Sibling (LCRS) transformation and parent vector with interactive animator.

[ OPEN → ]

DepuracionCodigoLimpio.java

Java

Debugging, Clean Code, and Refactoring

Lesson: Debugging, clean code, and refactoring

Scientific debugging loop, breakpoints and watches in the IDE, code smells catalog, and test-backed refactoring.

[ OPEN → ]

PaquetesNamespaces.java

Java

Packages, Namespaces, and Class Imports in Java

Lesson: Abstract Classes, Interfaces, and Code Organization

Name collisions, the package declaration and its folder, FQCN, import as an alias, ambiguity resolution, and package-private visibility.

[ OPEN → ]

git_fundamentos.sh

Git

Git Fundamentals and the Three-State Cycle

Lesson: Getting Started with Git

From untracked files to commits: Working Directory, Staging Area, local Repository, HEAD pointer, and snapshot anatomy.

[ OPEN → ]

git_remoto.sh

Git

Remote Synchronization: Fetch, Pull, and Push in Git

Lesson: Pulling and Pushing Changes

Distributed architecture, origin remote alias, remote-tracking branches origin/main, upstream tracking (-u), and fetch vs pull.

[ OPEN → ]

git_merge.sh

Git

Branches, Fast-Forward, 3-Way Merge, and Conflicts in Git

Lesson: Merging Branches and Conflicts

Feature branch isolation, integration with git merge, step-by-step resolution of conflict markers, and safe aborts.

[ OPEN → ]

git_rebase.sh

Git

Git Rebase, Linear History, and Best Practices

Lesson: Rebase and Best Practices in Git

Replaying commits on a new base, the Golden Rule of Rebase, step-by-step conflict resolution, atomic commits, and Conventional Commits.

[ OPEN → ]