Go: Data Structures, Algorithms and Design Patterns with Go

This video introduces the course and gives a quick look at where you’ll be at the end of the course. 

The most important task to do when starting with a new programming  language is to set the work environment. This video will show you how  to do this for Go.           

• Learn to install Go on different operating systems 

This video will show you how to write your first program in Go and walk you through some basic data types in Go language.           

• Write a simple program to display “Hello World”

• Learn about Integrated Development Environment (IDE)

• Learn about types, variables, and constants in Go

The basic logic for good programs are conditional statements.  Let’s get started with the most used conditional statements with this  video.           

• Using the if else statement

• Using the switch statement

• Using the for range statement 

In Go, whatever you design is used through functions. Let’s see how functions work and are used in Go.           

• Understanding a function

• Create, handle and return errors

• Explore functions with undetermined number of parameters

This video will show you how data structures are manipulated and used in Go.           

• Use arrays, slices and maps 

• Learn to use the visibility attribute of a function

The next step, after exploring functions and data structures, is  to learn about the most useful elements of Go, which are pointers,  structures and interfaces. Let’s jump right in to start with these.           

• Declare pointers

• Use and print the values from a pointer

• Declare and use structures;  at the end we will explore interfaces

• Explore interfaces

When you write a small piece of code, it is easy to spot bugs. But  what if the program or application grows bigger and bigger? Let’s see  how you could write unit tests to spot errors and catch bugs.           

• Learn about testing package

• Learn about TDD

Until now, you have learned to develop codes for applications. How  can you create libraries which are not applications or which do not  contain the main function? This video is an answer to this question.           

• Learn about the go get tool

• Learn about the encoding package

Go comes with a series of useful tools to ease the development  process every day. Let’s explore these amazing tools with this video.           

• Learn to use golint and gofmt tools

• Contribute to Go open source projects in GitHub

How can you have a unique instance of a type in the entire  program? Singleton design pattern is the way to achieve this. Let’s  learn about this pattern. 

• Write a counter that holds the number of times it has been called during program execution

How can you construct complex objects without directly  instantiating their struct or writing the logic they require? Let’s do  this with the builder design pattern.           

• Create a vehicle builder

• Write the implementation

How can we abstract the user from the knowledge of the struct he  needs to achieve for a specific purpose, such as retrieving some value,  maybe from a web service or a database? This video will help you answer  this question. 

• Implement a payments method Factory

• Create an interface with the Pay method

After learning about the factory design pattern, where we grouped a  family of related objects in our case payment methods, one can be quick  to think: what if I group families of objects in a more structured  hierarchy of families? This video will answer your question.   

• Reuse the Factory created in the Builder design pattern

• Create a new Factory to create shipment orders

Let’s see the last pattern with this video, which comes in handy  when creating objects and is commonly surrounded by more patterns.

• Build a small component of an imaginary customized shirts shop

• Create the Stock Keeping Unit (SKU) 

This video will walk you through the different approaches to  create hierarchies and trees of objects using the composite design  pattern.

• Create compositions along with binary tree compositions

• Solve the swimmer and fish problem using direct composition

How can you use something that wasn't built for a specific task at  the beginning? Let’s answer this question with the adapter design  pattern.

• Use an incompatible interface with an adapter object

• Unit-test the printer adapter

• Implement the adapter design pattern

Let’s learn to decouple abstraction from its implementation and  change what an object does as much as we want. This video will show you  how you can change the abstracted object while reusing the same  implementation.

• Write to an io.Writer interface

• Write two abstracted object users of the implementations

Let’s dive into the Proxy design pattern; it provides interesting features and possibilities with very little effort.

• Create a remote proxy to be a cache of objects before accessing a database

This video will walk you through the methods and practices to provide a lot of benefits when working with legacy code.

• Prepare a Pizza type

• Create the pizza as core and the ingredients as decorating types

• Write the implementation and Run the test

This video will show you how you can hide the rooms and corridors  of a building. By the end of this video, you will be able to shield the  code from unwanted access, order some calls, and hide the complexity  scope from the user.           

• Write your own library that accesses OpenWeatherMaps service

• Write the Unit test and create the implementation

This video will show you how to allow sharing the state of a heavy  object between many instances of some type. You will explore a very  commonly used design pattern, in computer graphics and the video game  industry.

• Simulate things that you find on betting web pages

• Store each team's information just once

• Deliver references to them to the users 

This video will walk you through the most important design pattern in object-oriented programming, with which many design patterns have something in common.

• Paint objects on a file

• Provide a way to show to the user an object in text or image

Through this video, you will learn to build chains of objects that can decide which between them must deal with a particular case.

• Develop a multi-logger solution

• Use two different console loggers and one general-purpose logger

This video will show you how to encapsulate actions that don’t necessarily need to be executed immediately or must be stored.

• Create a simple queue

• Create many instances of a type implementing a command pattern

• Pass these instances to a queue that will store the commands until three of them are in the queue

How could you provide a user some way to execute code within an algorithm? This video will let you answer this question. You will be able to write idiomatic Go Template patterns.

• Write an algorithm that is composed of three steps

• Make each step return a message

• Let the first and third steps be controlled by the template, and the second by the user

This video will show you how you could save milestones of a state when you have a type with some state. You will learn to recover them if necessary for a variety of tasks: undo operations, historic, and so on.

• Develop a simple example using a string as the state

• Store a finite amount of states of type string

• Restore the current stored state to one of the state list

This video will let you dig into a quite complex pattern, which is widely used to solve business cases where it's useful to have a language to perform common operations.

• Create a reverse Polish notation calculator

What if you want to abstract away some functionality from a set of objects? Let’s do it through this video.

• Delegate some logic of an object's type to an external type

• Emulate an online shop with a few products

You may require something that has one or more states and travels between them to execute some behaviors. These are termed as FSMs. Let's see how the State pattern helps us to define FSM.

• Develop a very simple game that uses FSM

• Create a type that alters its own behavior when some internal things have changed

• Add more states and reroute their output states

How do we avoid tight coupling between objects?

• Define an operation called Sum that takes a number and adds it to another number.

• Define an operation called Subtract that takes a number and substracts it to another number

• Develop an extremely simple arithmetic calculator

  
  

How can you uncouple an event from its possible handler? How can you achieve many actions that are triggered on one event? Let’s answer these questions with this video.

• Create a publisher with a NotifyObservers method

• Create a method to add new subscribers to the publisher

• Create a method to remove new subscribers from the publisher

This video gives you a quick glimpse of what all we will be exploring through this course.

Often concurrency is misunderstood as parallelism. This video gives you a clear definition and shows you the true essence of concurrent design patterns.

• Get introduced to Concurrency

• Compare concurrency with parallelism

How do we achieve concurrency in Go? This video is an answer to this question. Let’s get started with our first concurrent program.

• Create the first Goroutine

• Use an anonymous function and launch it in a new Goroutine using the go keyword

• Use WaitGroup to synchronize Goroutine

How can you write an anonymous function that executes within the context of a different function? Let’s do it with this video.

• Write a function to convert a string to uppercase

• Use the synchronous and asynchronous call backs within our routines

• Handle the Callback hell

If you are working with concurrent applications, you have to deal with more than oneresource potentially accessing some memory location. How do we deal with this condition? Let’s learn through this video.

• Develop a small concurrent counter

• Add 1 to an integer field in a Counter type

• Make the detector of the -race flag warn of a possible race condition

This video will walk you through the usage of channels that allow you to write concurrent applications. You could share a memory location and get a natural way to handle concurrent applications.

• Understand how channels work and learn to use them

• Use buffered channels and directional channels

• Use the select statement

It’s time put all our knowledge about Goroutines and channels in asingle package. Let’s do it right now with this video.

• Create a concurrent counter

• Use three channels, the first one to add 1

• Use the second channel to get thecurrent count and the third to stop the Goroutine

In this video, we will put up a barrier so that nobody passes till we have all our results using the Barrier pattern. It is very important in concurrency patterns.

• Create unit test with the function barrier

• Implement the unit test using correct and incorrect inputs

For asynchronous programming, we require Future pattern to achieve concurrent patterns. In this video, we will develop features.

• Create unit test using the success and fail functions

• Execute the tests in a uncontrollable and controllable way

• Perform the closure test

To build complex synchronous structures linked to one another, we require the Pipeline design pattern. It is one of the most important concurrent patterns.

• Create unit test

• Generate list and raise numbers to the power 2 and return the sum

• Launch pipeline