groovili

resource "aws_lambda_function" "check" {
    filename = "./check.zip"
    function_name = "check"
    role = "arn:aws:iam::424242:role/something"
    handler = "main"
    runtime = "go1.x"
    source_code_hash = "${base64sha256(file("./check.zip"))}"
}

resource "aws_cloudwatch_event_rule" "every_twelve_hours" {

groovili

Design patterns with Go

Course Materials

• Handouts / Worksheets
• Slides
• Code Examples
• Videos

Course objectives

groovili

package singleton

import (
    "sync"
)

type singleton struct {
}

var instance *singleton

groovili

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

groovili

package main

import (
	"fmt"
	"sync"
	"time"
)

type Fetcher interface {
	Fetch(url string) (body string, urls []string, err error)

groovili

package main

import (
	"golang.org/x/tour/tree"
	"fmt"
)

func _walk(t *tree.Tree, ch chan int) {
	if t == nil {
		return

groovili

# add tag
git tag 12345
# push tags to remote
git push --tags

# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345

groovili

<?php

function getPeriod(int $int, int $n): int {
  $m = '1';
  $m .= str_repeat(0, $n);
  
  return $int * ((int) $m);
}

function getRomanNumber(int $input): string{

groovili

<?php

function cm(array $ar1, array $ar2, int $rc = 0): array
{
    $duplicatePositions = [];
    $merged = [];
    
    foreach($ar1 as $key => &$value){
        if($dk = array_search($value, $ar2, true)){
            $duplicatePositions[$dk] = $ar2[$dk];