vg22

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?

vg22

<script>
  $(document).ready(function() {
    $("#getMessage").on("click", function(){
      // Only change code below this line.
      $(".message").html("Here is the message");
      // Only change code above this line.
    });
  });
</script>

vg22

function rot13(str) { // LBH QVQ VG!
  var i=0,j=0;var newstr=[];
  while(i<str.length){
	  if(str.charCodeAt(i)>64&&str.charCodeAt(i)<78){
		  
          
		   j=str.charCodeAt(i)+13;
		  
		  newstr.push(String.fromCharCode(j));

vg22

function rot13(str) { // LBH QVQ VG!
  var i=0,j=0;var newstr=[];
  while(i<str.length){
	  if(str.charCodeAt(i)>64&&str.charCodeAt(i)<78){
		  //(str.charCodeAt(i)<77){
		  
          //newstr[i]=str.charCodeAt(i)+13;
		   j=str.charCodeAt(i)+13;
		  //console.log(j);

vg22

function mutation(arr) {
var a=arr[0].toLowerCase().split("");
var b=arr[0].toLowerCase().split("");
var i=0;
for (i in b){
if(a.indexOf(b[i])>-1){
return true;
}
}
return false;

vg22

function largestOfFour(arr) {
  // You can do this!
  var max=0,i=0,j=0;
  var newArray=[];
  for (i=0;i<arr.length;i++){
   for(j=0;j<=arr.length;j++)
	   if(arr[i][j]>max){
		   max=arr[i][j];
		   
	   }