Go Tutorial - Learn Go from the Basics with Code Examples

First Class Functions

May 13, 2021 · 10 min read ·

Welcome to tutorial no. 34 in Golang tutorial series. What are first class functions? A language that supports first class functions allows functions to be assigned to variables, passed as arguments to other functions and returned from other functions. Go has support for first class functions. In this tutorial, we will …

Panic and Recover

Jul 8, 2020 · 12 min read ·

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Welcome to tutorial no. 33 in Golang tutorial series. What is Panic? The idiomatic way of handling abnormal conditions in a Go program is using errors. Errors are sufficient for most of the abnormal conditions arising in the program. But there are some situations where the program cannot continue execution after an …

Custom Errors

Aug 29, 2022 · 12 min read ·

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Welcome to tutorial no. 31 in our Golang tutorial series. In the last tutorial we learnt about error representation in Go and how to handle errors from the standard library. We also learnt how to extract more information from the errors. This tutorial deals with how to create our own custom errors which we can use in …

Error Handling

Aug 20, 2022 · 10 min read ·

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Welcome to tutorial no. 30 in Golang tutorial series. What are errors? Errors indicate any abnormal condition occurring in the program. Let’s say we are trying to open a file and the file does not exist in the file system. This is an abnormal condition and it’s represented as an error. Errors in Go are …

Defer

Feb 22, 2020 · 8 min read ·

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Welcome to tutorial no. 29 in Golang tutorial series. What is Defer? Defer statement is used to execute a function call just before the surrounding function where the defer statement is present returns. The definition might seem complex but it’s pretty simple to understand by means of an example. Example 1package …

Polymorphism - OOP in Go

Mar 29, 2021 · 8 min read ·

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Welcome to tutorial no. 28 in Golang tutorial series. Polymorphism in Go is achieved with the help of interfaces. As we have already discussed, interfaces are implicitly implemented in Go. A type implements an interface if it provides definitions for all the methods declared in the interface. Let’s see how …

Composition Instead of Inheritance - OOP in Go

Mar 23, 2021 · 6 min read ·

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Welcome to tutorial no. 27 in Golang tutorial series. Go does not support inheritance, however, it does support composition. The generic definition of composition is “put together”. One example of composition is a car. A car is composed of wheels, an engine and various other parts. Composition by embedding …

Structs Instead of Classes - OOP in Go

May 3, 2020 · 7 min read ·

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Welcome to tutorial no. 26 in Golang tutorial series. Is Go Object Oriented? Go is not a pure object oriented programming language. This excerpt taken from Go’s FAQs answers the question of whether Go is Object Oriented. Yes and no. Although Go has types and methods and allows an object-oriented style of …

Go Mutex Tutorial

Mar 3, 2021 · 8 min read ·

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Welcome to tutorial no. 25 in Golang tutorial series. In this tutorial, we will learn about mutexes. We will also learn how to solve race conditions using mutexes and channels. Critical section Before jumping to mutex, it is important to understand the concept of critical section in concurrent programming. When a …

Select

Mar 3, 2021 · 7 min read ·

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Welcome to tutorial no. 24 in Golang tutorial series. What is select? The select statement is used to choose from multiple send/receive channel operations. The select statement blocks until one of the send/receive operations is ready. If multiple operations are ready, one of them is chosen at random. The syntax is …