vasanthk

System Design Cheatsheet

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

Basic Steps

1. 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?

btroncone

import { Injectable } from 'angular2/core';
import { Storage } from './storage';
import { CurrentUser } from '../interfaces/common';

@Injectable()
export class Authentication{
    private _storageService : Storage;
    private _userKey : string = "CURRENT_USER";

    constructor(storageService : Storage){

iliakan

upstream example-webpack {
  server 127.0.0.1:8080;
}

upstream example-backend {
  server 127.0.0.1:3000;
}

server {
  listen 80;

echohack

ffmpeg -i input_file.mp4 -vf scale=320:-1:flags=lanczos,fps=30 frames/ffout%03d.png
convert -loop 0 frames/ffout*.png output_file.gif

mkanchwala

How to create a MultiNode - MultiBroker Cluster for Kafka on AWS

PreRequisites :

1. Kafka Binary files : http://kafka.apache.org/downloads.html

2. Atleast 2 AWS machines : AWS EMR or EC2 will be preferable

3. A Kafka Manager Utility to watch up the Cluster : https://cwiki.apache.org/confluence/display/KAFKA/Ecosystem

region23

На русском языке

• Введение в программирование на Go - http://golang-book.ru/
• Всё, что вы хотели знать про GOPATH и GOROOT - http://habrahabr.ru/post/249545/ (статья на Хабре)
• Русский форум по Go - https://groups.google.com/forum/#!forum/golang-ru

Русскоязычные сайты и сообщества

• Первый русскоязычный сайт по Go http://4gophers.com/
• Русскоязычный slack-чат по Go https://golang-ru.slack.com

English resources

noelwelsh

import scalaz.\/
import scalaz.syntax.either._

object Example2 {
  // This example simulates error handling for a simple three tier web application
  //
  // The tiers are:
  // - the HTTP service
  // - a user authentication layer
  // - a database layer

davegurnell

Error Handling in Scala

Scala does not have checked exceptions like Java, so you can't do soemthing like this to force a programmer to deal with an exception:

public void stringToInt(String str) throws NumberFormatException {
  Integer.parseInt(str)
}

gitaarik

Git Submodules - Basic Explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a sub-repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

• Separate big codebases into multiple repositories.