Trees
a data structure that is constructed with nodes, where each has some value and may point to child-nodes, which recursively form subtrees in the tree.
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- Data Structures 11
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- Refactoring 2
- Clean code 2
- Aggregate 2
- Patterns 2
- Design 2
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- TDD 1
- Object oriented programming 1
- Good practices 1
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- Custom Assertions 1
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- Bean Scopes 1
- Observer pattern 1
- MongoDB 1
- Indexes 1
- Efficiency 1
- Cache 1
- Spring Cache 1
- Comparator 1
- Comparable 1
- Sorting 1
- equals hashCode contract 1
- Builder pattern 1
- DeMorgan's Laws 1
- Logical conditions 1
- BigDecimal and BigInteger 1
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- Strings 1
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- Trees 1
- Effective Java 1
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- Microservices 1
- Algorithms 1
- Design Patterns 1
- Specification Design Pattern 1
- Metrics 1
- Coupling 1
- IoC and DI 1
- Application Architecture 1
Data Structures
Graphs
Graph is a collection of nodes that may or may not be connected to each other.
Strings
String
Stacks and Queues
Stacks
Hash Tables
A data structure that store data in key-value pairs and provides fast insertion, deletion and searching.
Linked Lists
Is very similar to array, at least conceptually, to an array.
Arrays
There are two types of arrays. Static and dynamic ones.
Logarithm
It’s mathematical concept which is very often used in Computer Science in context of algorithms complexity, it’s even sounds similar 😀
Big O Notation
The Big O Notation is a mathematical, asymptotic notation that describes time complexity and space complexity of algorithms/ function when the argument tends...
Memory
Key Terms
Data structures knowledge compendium
What are data structures?
Complexity Analysis
Trees
a data structure that is constructed with nodes, where each has some value and may point to child-nodes, which recursively form subtrees in the tree.
Graphs
Graph is a collection of nodes that may or may not be connected to each other.
Strings
String
Stacks and Queues
Stacks
Hash Tables
A data structure that store data in key-value pairs and provides fast insertion, deletion and searching.
Linked Lists
Is very similar to array, at least conceptually, to an array.
Arrays
There are two types of arrays. Static and dynamic ones.
Logarithm
It’s mathematical concept which is very often used in Computer Science in context of algorithms complexity, it’s even sounds similar 😀
Complexity Analysis
It’s a process in which we determine how efficient an algorithm is. There are multiple ways to solve the same issue but the complexity analysis will likely d...
SOLID
Builder Design Patter
Builder is a creational design pattern that lets you construct complex objects step by step. The pattern allows you to produce different types and representa...
Observer Design Patter
The observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies t...
Strategy Design Patter
Strategy is a behavioral design pattern that lets you define a family of algorithms, put each of them into a separate class, and make their objects interchan...
SOLID: The First 5 Principles of Object Oriented Design
SOLID is an acronym for the first five object-oriented design (OOD) principles by Robert C. Martin (also known as Uncle Bob).
Design patterns
Builder Design Patter
Builder is a creational design pattern that lets you construct complex objects step by step. The pattern allows you to produce different types and representa...
Observer Design Patter
The observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies t...
Strategy Design Patter
Strategy is a behavioral design pattern that lets you define a family of algorithms, put each of them into a separate class, and make their objects interchan...
Domain Driven Design
Singleton Pattern
Singleton
Aggregate Pattern
The Aggregate is one of the main pattern in Domain Driven Design (DDD) introduced by Martin Fowler.
Custom Assertions with AssertJ
You may have contact with test that are not too readable, as the communicates when they fail. In that case you should take in consideration creating your own...
DDD
Singleton Pattern
Singleton
Aggregate Pattern
The Aggregate is one of the main pattern in Domain Driven Design (DDD) introduced by Martin Fowler.
Custom Assertions with AssertJ
You may have contact with test that are not too readable, as the communicates when they fail. In that case you should take in consideration creating your own...
Test
Custom Assertions with AssertJ
You may have contact with test that are not too readable, as the communicates when they fail. In that case you should take in consideration creating your own...
What are benefits of testing?
Do i really need tests? Isn’t it a waste of time? And other questions like this that you might asked once or still asking yourself. Its not true and let me e...
Spring
Spring Cache
What is Spring Cache? How to configure it in your project and how to use it? How does Spring Cache work? How to add an external provider that allows flexible...
Spring Bean Scopes
The scope defines the runtime context within which the bean instance is available.
Java
Depth First Search in Java
Depth First Search [DFS]
Java equals and hashCode contract
Equals() method
OOP
Core concepts behind OOP
What does mean object-oriented programming?
Composition, Aggregation and Association
Introduce
Refactoring
How to approach refactoring
Introduce
Clean code
Static Factory Method
In an object-oriented language like Java, what could be wrong with constructors? Overall, nothing. Even so, the famous Joshua Block’s Effective Java Item 1 c...
How to approach refactoring
Introduce
Aggregate
Singleton Pattern
Singleton
Aggregate Pattern
The Aggregate is one of the main pattern in Domain Driven Design (DDD) introduced by Martin Fowler.
Patterns
Singleton Pattern
Singleton
Aggregate Pattern
The Aggregate is one of the main pattern in Domain Driven Design (DDD) introduced by Martin Fowler.
Design
Inversion of Control and Dependency Injection
Inversion of Control and Dependency Injection
What is coupling?
In object-oriented paradigm, Coupling refers to the degree of direct knowledge that one element has of another. We may generally divide coupling to tight and...
Test Driven Development
What are benefits of testing?
Do i really need tests? Isn’t it a waste of time? And other questions like this that you might asked once or still asking yourself. Its not true and let me e...
TDD
What are benefits of testing?
Do i really need tests? Isn’t it a waste of time? And other questions like this that you might asked once or still asking yourself. Its not true and let me e...
Object oriented programming
SOLID: The First 5 Principles of Object Oriented Design
SOLID is an acronym for the first five object-oriented design (OOD) principles by Robert C. Martin (also known as Uncle Bob).
Good practices
SOLID: The First 5 Principles of Object Oriented Design
SOLID is an acronym for the first five object-oriented design (OOD) principles by Robert C. Martin (also known as Uncle Bob).
Strategy pattern
Strategy Design Patter
Strategy is a behavioral design pattern that lets you define a family of algorithms, put each of them into a separate class, and make their objects interchan...
Custom Assertions
Custom Assertions with AssertJ
You may have contact with test that are not too readable, as the communicates when they fail. In that case you should take in consideration creating your own...
Spring Bean
Spring Bean Scopes
The scope defines the runtime context within which the bean instance is available.
Context
Spring Bean Scopes
The scope defines the runtime context within which the bean instance is available.
Bean Scopes
Spring Bean Scopes
The scope defines the runtime context within which the bean instance is available.
Observer pattern
Observer Design Patter
The observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies t...
MongoDB
MongoDB Indexes
Why use indexes?
Indexes
MongoDB Indexes
Why use indexes?
Efficiency
MongoDB Indexes
Why use indexes?
Cache
Spring Cache
What is Spring Cache? How to configure it in your project and how to use it? How does Spring Cache work? How to add an external provider that allows flexible...
Spring Cache
Spring Cache
What is Spring Cache? How to configure it in your project and how to use it? How does Spring Cache work? How to add an external provider that allows flexible...
Comparator
Comparable and Comparator Interfaces
Comparable.
Comparable
Comparable and Comparator Interfaces
Comparable.
Sorting
Comparable and Comparator Interfaces
Comparable.
equals hashCode contract
Java equals and hashCode contract
Equals() method
Builder pattern
Builder Design Patter
Builder is a creational design pattern that lets you construct complex objects step by step. The pattern allows you to produce different types and representa...
DeMorgan's Laws
DeMorgan’s Laws
DeMorgan’s Laws
Logical conditions
DeMorgan’s Laws
DeMorgan’s Laws
BigDecimal and BigInteger
BigDecimal and BigInteger in Java
BigDecimal
Precise numbers
BigDecimal and BigInteger in Java
BigDecimal
Composition
Composition, Aggregation and Association
Introduce
Association
Composition, Aggregation and Association
Introduce
Aggregation
Composition, Aggregation and Association
Introduce
Communication
Back to Top ↑Business
Back to Top ↑SQL
Database SQL vs NoSQL
Introduce
NoSQL
Database SQL vs NoSQL
Introduce
Databases
Database SQL vs NoSQL
Introduce
Testing
Difference between @Mock and @MockBean
Introduce
Mocks
Difference between @Mock and @MockBean
Introduce
Big O
Complexity Analysis
It’s a process in which we determine how efficient an algorithm is. There are multiple ways to solve the same issue but the complexity analysis will likely d...
Memory
Memory
Key Terms
Big O Notation
Big O Notation
The Big O Notation is a mathematical, asymptotic notation that describes time complexity and space complexity of algorithms/ function when the argument tends...
Arrays
Arrays
There are two types of arrays. Static and dynamic ones.
Linked Lists
Linked Lists
Is very similar to array, at least conceptually, to an array.
Hash Tables
Hash Tables
A data structure that store data in key-value pairs and provides fast insertion, deletion and searching.
Stacks
Stacks and Queues
Stacks
Queues
Stacks and Queues
Stacks
Strings
Strings
String
Graphs
Graphs
Graph is a collection of nodes that may or may not be connected to each other.
Trees
Trees
a data structure that is constructed with nodes, where each has some value and may point to child-nodes, which recursively form subtrees in the tree.
Effective Java
Static Factory Method
In an object-oriented language like Java, what could be wrong with constructors? Overall, nothing. Even so, the famous Joshua Block’s Effective Java Item 1 c...
Architecture
Back to Top ↑Monolith
Back to Top ↑Microservices
Back to Top ↑Algorithms
Depth First Search in Java
Depth First Search [DFS]
Design Patterns
Specification Design Pattern
Introduction
Specification Design Pattern
Specification Design Pattern
Introduction
Metrics
What is coupling?
In object-oriented paradigm, Coupling refers to the degree of direct knowledge that one element has of another. We may generally divide coupling to tight and...
Coupling
What is coupling?
In object-oriented paradigm, Coupling refers to the degree of direct knowledge that one element has of another. We may generally divide coupling to tight and...
IoC and DI
Inversion of Control and Dependency Injection
Inversion of Control and Dependency Injection
Application Architecture
Inversion of Control and Dependency Injection
Inversion of Control and Dependency Injection