Chris Rinaldi cgrinaldi

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.

	#!/bin/bash
	localPATH=`pwd` # path of current directory
	sep='---------------'
	for d in */; do
	echo $sep"Checking Status of" $d$sep
	d=`echo $d \| sed s#/##` # remove trailing forward slash
	git -C $localPATH/$d checkout master # checkout master in different directory
	git -C $localPATH/$d status # run git status
	echo -e '\n'
	done

	#!/bin/bash
	localPATH=`pwd` # path of current directory
	sep='---------------'
	for d in */; do
	echo $sep"Processing" $d$sep
	d=`echo $d \| sed s#/##` # remove trailing forward slash
	remoteRepo="https://github.com/hackreactor/$d.git" # location of remote repo
	git -C $localPATH/$d remote add upstream $remoteRepo # add remote repo as upstream
	git -C $localPATH/$d checkout master # checkout master branch in current $d
	firstCommit=`git -C $localPATH/$d rev-list HEAD \| tail -n 1` # identify the first commit in master

	// simple example of a function declaration
	function double (number) {
	var result = 2 * number;
	return result;
	}

	sayHello(); // will error out (see below for reason)
	var sayHello = function() {
	console.log('Hello, world!');
	};

	a (function (data1) {
	b (function (data2) {
	c (function (data3) {
	d (function (data4) {
	e (function (data5) {
	f (function (data6) {
	// The Egyptions would be jealous of this pyramid!
	})
	}
	})

	sayHello(); // logs 'Hello, world!'

	function sayHello() {
	console.log('Hello, world!');
	}

	var fs = require('fs');
	var getConfig = function() {
	// Using promises because fs.readFile() is async
	var deferred = Q.defer();
	fs.readFile(__dirname + '/../../aFile.conf', 'utf-8', function(err, data) {
	if (err) {
	deferred.reject(err);
	}
	var configJSON = helpers.config2JSON(data, true); // true indicates we are parsing the input section
	deferred.resolve(configJSON);

	var myNumber = 2;
	console.log(myNumber);

	a()
	.then(b)
	.then(c)
	.then(d);