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@wayspurrchen
wayspurrchen / The Technical Interview Cheat Sheet.md
Last active August 29, 2015 14:28 — forked from tsiege/The Technical Interview Cheat Sheet.md
This is my technical interview cheat sheet. Feel free to fork it or do whatever you want with it. PLEASE let me know if there are any errors or if anything crucial is missing. I will add more links soon.

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

  • Stores data elements based on an sequential, most commonly 0 based, index.
  • Based on tuples from set theory.
function retry ( promiseToRetry, maxRetries ) {
return new Promise( function ( resolve, reject ) {
promiseToRetry.then( function ( resolve ) {
resolve( result );
} ).catch( function ( e ) {
if ( maxRetries > 0 ) {
return retry( promiseToRetry, maxRetries - 1 );
} else {
reject( e )
}
@wayspurrchen
wayspurrchen / gist:c688b2d9685418901791
Last active August 29, 2015 14:13
Grab and list all (unique) classes on page
var cls = [];
Array.prototype.slice.call( document.querySelectorAll('*'), 0 ).forEach( function ( el ) {
cls = cls.concat( Array.prototype.slice.call( el.classList, 0 ) );
} );
cls = cls.reduce( function ( p, c ) {
if ( p.indexOf( c ) < 0 ) p.push( c );
return p;
}, [] );
console.log( cls );
http://mkopas.net/files/conversations/conversations.html
http://tarasue.makiyamazaki.com/
http://www.newgrounds.com/portal/view/591565
@wayspurrchen
wayspurrchen / controller.js
Created October 15, 2014 03:02
Johnny-Five Arduino UNO Pixel Iterator RGB LED Code
var five = require('johnny-five');
var keypress = require('keypress');
var gm = require('gm');
var board = new five.Board();
var fs = require('fs');
var PNG = require('pngjs').PNG;
function componentToHex(c) {
var hex = c.toString(16);
return hex.length == 1 ? "0" + hex : hex;
<!DOCTYPE html>
<html>
<head>
<style>
.container-one {
min-height: 200px;
background-color: white;
}
.container-two {
min-height: 200px;
<!DOCTYPE html>
<html>
<script src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
</html>
<body>
<button id="scissors">scissors</button>
<button id="rock">rock</button>
<button id="paper">paper</button>
<h1 id="decision">OUTCOME GOES HERE</h1>
@wayspurrchen
wayspurrchen / index.html
Created August 28, 2014 16:15
Quizzy sample code
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
<script src="http://underscorejs.org/underscore-min.js"></script>
<script src="main.js"></script>
</head>
<body>
<div id="quiz-app"></div>
<script type="text/template" id="template-question">
@wayspurrchen
wayspurrchen / callbackWrapper.js
Last active August 29, 2015 14:04
Code snippet that can wrap any function and give it the ability to run a callback
var callbackCurrier = function(obj, funcName) {
var originalFunction = obj[funcName];
var callbackFunc = function() {
var args = Array.prototype.slice.call(arguments, 0);
var callback = args.pop();
var returnValue = originalFunction.apply(obj, args);
if (callback) {
callback(returnValue);
}
};