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?

ngauthier

// keepDoingSomething will keep trying to doSomething() until either
// we get a result from doSomething() or the timeout expires
func keepDoingSomething() (bool, error) {
	timeout := time.After(5 * time.Second)
	tick := time.Tick(500 * time.Millisecond)
	// Keep trying until we're timed out or got a result or got an error
	for {
		select {
		// Got a timeout! fail with a timeout error
		case <-timeout:

joecliff

var CryptoJS = require("crypto-js");//replace thie with script tag in browser env

//encrypt
var rawStr = "hello world!";
var wordArray = CryptoJS.enc.Utf8.parse(rawStr);
var base64 = CryptoJS.enc.Base64.stringify(wordArray);
console.log('encrypted:', base64);

//decrypt
var parsedWordArray = CryptoJS.enc.Base64.parse(base64);

jeetsukumaran

// Sample custom iterator.
// By perfectly.insane (http://www.dreamincode.net/forums/index.php?showuser=76558)
// From: http://www.dreamincode.net/forums/index.php?showtopic=58468

#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
#include <cassert>

hallettj

// It is important to declare your variables.

(function() {
    var foo = 'Hello, world!';
    print(foo);  //=> Hello, world!
})();

// Because if you don't, the become global variables.

(function() {