Andy Winarko winarcooo

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

FWIW: I'm not the author of the content presented here (which is an outline from Edmond Lau's book). I've just copy-pasted it from somewhere over the Internet, but I cannot remember what exactly the original source is. I was also not able to find the author's name, so I cannot give him/her the proper credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

Cherry pick multiple commits from a remote or upstream branch into your local branch.

Saw this from a comment on an answer on Stack Overflow

git fetch upstream
git cherry-pick A^..B

	<?php

	public function cacheOrDatabase(string $cacheKey, callable $callable)
	{
	if ($this->cache->has($cacheKey)) {
	return $this->cache->get($cacheKey);
	}
	$fromDatabase = $callable();

	if ($dataFromDatabase === null \|\| empty($dataFromDatabase)) {

	<?php

	// check from cache, if not exist get using closure,
	// then save to cache
	$value = Cache::remember('users', $seconds, function () {
	return DB::table('users')->get();
	});

	// wrap closure using transaction from DB facade
	use Illuminate\Support\Facades\DB;

	<?php

	require_once 'Container.php';

	class UserController
	{
	public $repository;

	public function __construct(Repository $repository)
	{

	// delete branch locally
	git branch -d localBranchName

	// delete branch remotely
	git push origin --delete remoteBranchName

	'''
	Task description
	An array A consisting of N different integers is given. The array contains integers in the range [1..(N + 1)], which means that exactly one element is missing.

	Your goal is to find that missing element.

	Write a function:

	def solution(A)

Andy Winarko winarcooo

System Design Cheatsheet

Basic Steps

Effective Engineer - Notes

What's an Effective Engineer?

Reference

ToC

A. Eloquent