Debug School

Rajesh Kumar
Rajesh Kumar

Posted on • Edited on

Day 1 - Golang - Aug 2026

How to install Go in Ubuntu
URL - Guide

Lets Run Fundamental Code in Go
https://www.devopsschool.com/tutorials/go-tutorials-foundation-level/

** Advance Go Array - Slice - Map - Struct **
https://www.devopsschool.com/tutorials/go-tutorials-arrays-slices-maps-and-structs/

Go Tutorials: Arrays, Slices, Maps, and Structs
https://www.devopsschool.com/tutorials/go-tutorials-arrays-slices-maps-and-structs/

Go Tutorial: Go Functions and Methods
https://www.devopsschool.com/tutorials/go-tutorial-go-functions-and-methods/

Go Tutorial: Go Interfaces
https://www.devopsschool.com/tutorials/go-tutorial-go-interfaces/

Go concurrency
https://www.devopsschool.com/tutorials/go-tutorials-go-concurrency-beginner-tutorial/

*How to setup k8 cluster *
https://github.com/certifications-tutorials/kubernetes-cluster-setup

capstone
https://github.com/devopsschool-demo-labs-projects/go-programming/tree/main/capstone

Package Dependecy in Go
15 mins - https://www.devopsschool.com/tutorials/go-tutorials-15-minute-lab-dependency-management-with-go-modules/
1 Hour - https://www.devopsschool.com/tutorials/go-tutorials-dependency-management-with-go-modules/
2 Hour - https://www.devopsschool.com/tutorials/go-tutorials-hands-on-lab-dependency-management-with-go-modules/

*Concurrency *
https://www.devopsschool.com/tutorials/go-tutorials-concurrency-made-simple/

Project - Capstone

Phase - 0 - experience monoth app [ 1 DB + 2 Service ]
Phase - 1 - 2 microservices

Phase - 2- Some issues --- We need to follow best prac -
https://github.com/devopsschool-demo-labs-projects/go-monolith-microservices-lab-demo

*Kafka - 1 *
https://www.devopsschool.com/tutorials/kafka-master-tutorials-series-1-an-introduction-of-kafka/
https://www.devopsschool.com/tutorials/kafka-master-tutorials-series-2-how-kafka-works-its-architecture-workflow/

Top comments (3)

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akash_singh_9d8e2205dc9ac profile image
Akash Singh • • Edited 
package main

import "fmt"

func main() {
    var  message float32 = 1.3

    // p stores the address of message.
    p := &message

    fmt.Println("original:", message)
    fmt.Println("through pointer:", *p)
    fmt.Println(p)
    // Dereferencing lets us update the original value.
    *p = 234234234.5324234234
    fmt.Println(p)
    fmt.Println("updated:", message)
}
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rajesh_kumar profile image
Rajesh Kumar •

float32 only has about 6–7 decimal digits of precision.

Your number:

234234234.5324234234

has far more precision than float32 can store.

Therefore Go will store an approximation, likely something around:

234234240

or display it in scientific notation such as:

2.3423424e+08

This is not a pointer problem. It is a float32 precision limitation.

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srushti profile image
Srushti D A •

package main

import "fmt"

func main() {
// Start empty, with room for three strings before growth is needed.
names := make([]string, 0, 3)

names = append(names, "Asha")
names = append(names, "Ben", "Chen")
names = append(names, "sru")
fmt.Println("names:", names)
fmt.Println("length:", len(names))
fmt.Println("capacity:", cap(names))

// Slice expressions can create a view over part of a slice.
firstTwo := names[:2]
fmt.Println("first two:", firstTwo)
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}

O/P: > go run hello.go
names: [Asha Ben Chen sru]
length: 4
capacity: 6
first two: [Asha Ben]

what is the logic behind the capacity here?