In programming languages, an abstract type is a type in a nominative type system that cannot be instantiated directly; a type that is not abstract – which can be instantiated – is called a concrete type. Every instance of an abstract type is an instance of some concrete subtype. Abstract types are also known as existential types. An abstract type may provide no implementation, or an incomplete implementation. In some languages, abstract types with no implementation (rather than an incomplete implementation) are known as protocols, interfaces, signatures, or class types. In class-based object-oriented programming, abstract types are implemented as abstract classes (also known as abstract base classes), and concrete types as concrete classes. In generic programming, the analogous notion is a concept, which similarly specifies syntax and semantics, but does not require a subtype relationship: two unrelated types may satisfy the same concept. Often, abstract types will have one or more implementations provided separately, for example, in the form of concrete subtypes that can be instantiated. In object-oriented programming, an abstract class may include abstract methods or abstract properties that are shared by its subclasses. Other names for language features that are (or may be) used to implement abstract types include traits, mixins, flavors, roles, or type classes. (Wikipedia).

Lesson 02_03 Abstract and concrete types

Download the notebook files as they are added at: http://www.juanklopper.com/computer-programming/ All types are either concrete (that is a type right at the bottom of the tree of types) or abstract (basically everything higher up the tree). Concrete types are what we work with. We can c

From playlist The Julia Computer Language

19 Defining the types of binary operations

The two types of binary operations discussed in this video are commutative and associative. We saw them in the previous video and here we define them specifically so that we can build on our repertoire to use in proofs. Remember, it is by filling up our toolbox with these definitions that

From playlist Abstract algebra

Now that we know what a quotient group is, let's take a look at an example to cement our understanding of the concepts involved.

From playlist Abstract algebra

Group Definition (expanded) - Abstract Algebra

The group is the most fundamental object you will study in abstract algebra. Groups generalize a wide variety of mathematical sets: the integers, symmetries of shapes, modular arithmetic, NxM matrices, and much more. After learning about groups in detail, you will then be ready to contin

From playlist Abstract Algebra

In this video we look at the commutative and associative types of operations on the two example sets from the previous video.

From playlist Abstract algebra

10 Relations (still with the not-so-exciting-stuff)

This video introduces relations between pairs of elements.

From playlist Abstract algebra

What are the Types of Numbers? Real vs. Imaginary, Rational vs. Irrational

We've mentioned in passing some different ways to classify numbers, like rational, irrational, real, imaginary, integers, fractions, and more. If this is confusing, then take a look at this handy-dandy guide to the taxonomy of numbers! It turns out we can use a hierarchical scheme just lik

From playlist Algebra 1 & 2

Equivalence Relations Definition and Examples

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Equivalence Relations Definition and Examples. This video starts by defining a relation, reflexive relation, symmetric relation, transitive relation, and then an equivalence relation. Several examples are given.

From playlist Abstract Algebra

Abstract Algebra | Normal Subgroups

We give the definition of a normal subgroup and give some examples. http://www.michael-penn.net http://www.randolphcollege.edu/mathematics/

From playlist Abstract Algebra

RailsConf 2014 - Writing Small Code by Mark Menard

Writing small classes is hard. You know you should, but how? It's so much easier to write a large class. In this talk we'll build up a set of small classes starting from nothing using a set of directed refactorings applied as we build, all while keeping our tests green. We'll identify abst

From playlist RailsConf 2014

The Shape of Functional Programming - O'Reilly Webcast

You may have heard the news that functional programming is in and object-oriented programming is out. Well, that's not actually true, but it's safe to say that functional programming is grabbing the attention of more and more software developers. A rapidly growing programming paradigm, fun

From playlist O'Reilly Webcasts 3

Abstract Factory Design Pattern

Get the Code Here: http://goo.gl/AZU3C Best Design Patterns Book : http://goo.gl/W0wyie Here is my Abstract Factory design pattern tutorial. I also take a second look at the Factory design pattern here as well. This is considered a hard pattern to understand, but I consider it to be a c

From playlist Java Video Tutorial

OOP Concepts | Java Tutorial For Beginners | Edureka

Watch sample class recording: http://www.edureka.co/java-j2ee-soa-training?utm_source=youtube&utm_medium=referral&utm_campaign=oop_concepts OOP or Object Oriented Programming is a paradigm of programming that represents ‘objects’ with data fields. Java uses OOP by creating an abstraction

From playlist Java Online Training Videos

PROG2006: Haskell 01, About abstract thinking

PROG2006: Haskell 01, About abstract thinking Introduction to Haskell, GHCI, types, functions

From playlist PROG2006 - Programming

Introduction to Julia || Jose Storopoli

This workshop is geared towards anyone who wants to start using Julia. It will be an extremely accessible overview of Julia. You can download Julia here: https://julialang.org/downloads/ PUBLICATION PERMISSIONS: PyData provided Coding Tech with the permission to republish PyData talks.

From playlist Data Science

Code is Here: http://goo.gl/8I3sW Best Java Book : http://goo.gl/FtKp0m In this part of the Java Video Tutorial I cover interfaces, abstract classes, abstract methods and more. You need interfaces and abstract classes because Java doesn't allow you to inherit from more than one other cl

From playlist Java Video Tutorial

Python Classes and Objects Tutorial | Python Tutorial For Beginners | Edureka | Django Rewind - 2

🔥Edureka Python Django Training:: https://www.edureka.co/python-django This Edureka Python Classes and Objects tutorial will help you understand Python Classes and Objects with examples. It will also explain the concept of Abstract Classes and Inheritance in python. 🔹Python Tutorial Play

From playlist Edureka Live Classes 2020

Take instructor-led Live class on Java Tutorial at : http://www.edureka.co/java-course The following topics were covered in this Java Tutorial: The overloaded function must differ either by the number of arguments or operands or data types but with same name. So we are trying use same m

From playlist Java Online Training Videos

What is Abstract Algebra? (Modern Algebra)

Abstract Algebra is very different than the algebra most people study in high school. This math subject focuses on abstract structures with names like groups, rings, fields and modules. These structures have applications in many areas of mathematics, and are being used more and more in t

From playlist Abstract Algebra

Python Class | Python Classes | Python Programming | Python Tutorial | Edureka

( Python Training : https://www.edureka.co/data-science-python-certification-course ) This Edureka Python Class tutorial (Python Tutorial Blog: https://goo.gl/wd28Zr) will help you understand Python Classes and Objects with examples. It will also explain the concept of Abstract Classes and

From playlist Python Programming Tutorials | Edureka