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Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

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# How to get ClamAV working on CentOS 7

yum -y install epel-release && yum -y update
yum -y install clamav clamav-data clamav-scanner clamav-scanner-systemd clamav-server clamav-server-systemd clamav-unofficial-sigs clamav-update

# Add /etc/clamd.d/freshclam.conf

# Add /usr/lib/systemd/system/clamav-freshclam.service

systemctl enable clamav-freshclam.service && systemctl start clamav-freshclam.service

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package main

import (
	"fmt"
	"log"
	"os/exec"
	"runtime"
)

type Worker struct {

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package main
 
import ("fmt"; "math")
 
// interfaces
type Shaper interface {
    area() float64
	perimeter() float64
}
 

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# Download Go (use any of the latest versions)
curl -O https://storage.googleapis.com/golang/go1.8.linux-amd64.tar.gz

# Extract Go
tar -xvf go*.tar.gz

# Install Go
sudo mv go /usr/local

# Create a workspace folder

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// Also available at: https://play.golang.org/p/yTTpB5gB6C

package main

import (
	"fmt"
)

// *****************************************************************************
// Example 1 - Struct vs Struct with Embedded Type

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(Assuming a Debian 8-like system)

• Install prometheus-node-exporter

  $ sudo apt update && sudo apt install prometheus-node-exporter

• Configure prometheus-node-exporter to expose metrics only to localhost, not on to all networks. Modify file /etc/default/prometheus-node-exporter:

  # Set the command-line arguments to pass to the server.

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RECAPTCHA_PUBLIC_KEY = '<public key>'
RECAPTCHA_PRIVATE_KEY = '<private key>'


def checkRecaptcha(response, secretkey):
        url = 'https://www.google.com/recaptcha/api/siteverify?'
        url = url + 'secret=' + str(secretkey)
        url = url + '&response=' +str(response)

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Conferences

• Hydraconf

Books

• Distributed Systems 3rd Edition by Maarten van Steen and Andrew S. Tanenbaum
• Data Intensive Applications by Martin Kleppmann

Videos

• Tim Berguland Distributed Systems course
• MSR India 2012 Summer School on Distributed Algorithms, Systems, and Programming

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import random
import os


random.seed(42)

F_PATH = "data.csv"
OUTPUT_PATH_TEMPLATE = "tmp_%d.csv"
CHUNK_SIZE = 5