Gaurav Mehla gauravmehla

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.

Frontend Development

Attention: the list was moved to

https://github.com/dypsilon/frontend-dev-bookmarks

This page is not maintained anymore, please update your bookmarks.

1. Clone your fork:

git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

var Article = require('../../../models/article');

Those suck for maintenance and they're ugly.

	"use strict";
	var crypto = require("crypto");

	var EncryptionHelper = (function () {

	function getKeyAndIV(key, callback) {

	crypto.pseudoRandomBytes(16, function (err, ivBuffer) {

	var keyBuffer = (key instanceof Buffer) ? key : new Buffer(key) ;

	// AES Encryption/Decryption with AES-256-GCM using random Initialization Vector + Salt
	// ----------------------------------------------------------------------------------------
	// the encrypted datablock is base64 encoded for easy data exchange.
	// if you have the option to store data binary save consider to remove the encoding to reduce storage size
	// ----------------------------------------------------------------------------------------
	// format of encrypted data - used by this example. not an official format
	//
	// +--------------------+-----------------------+----------------+----------------+
	// \| SALT \| Initialization Vector \| Auth Tag \| Payload \|
	// \| Used to derive key \| AES GCM XOR Init \| Data Integrity \| Encrypted Data \|

	# Setting PATH for Python 3.4
	# The orginal version is saved in .bash_profile.pysave
	export PS1="\[\033[36m\]\u\[\033[m\]@\[\033[32m\]\h:\[\033[33;1m\]\w\[\033[m\]\$ "
	PATH="/Library/Frameworks/Python.framework/Versions/3.4/bin:${PATH}"
	ataPS1="\n$PS1"
	export PATH=$PATH:/Users/gaurav/Library/Android/sdk/platform-tools

	# If you come from bash you might have to change your $PATH.
	# export PATH=$HOME/bin:/usr/local/bin:$PATH

	alias lcd="$HOME/Documents/livecheck/development/"
	alias lci="$HOME/Documents/livecheck/ionic"
	alias ni="npm install && terminal-notifier -title 'npm install' -message 'command execution done' -sound default"
	alias f="fuck"
	alias t="tree -C -I 'node_modules\|dist\|files\|vendor' -L 4"

	export PATH=$PATH:/Users/gaurav/Library/Android/sdk/

	package com.gabesechan.android.reusable.receivers;

	import java.util.Date;

	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.telephony.TelephonyManager;

	public abstract class PhonecallReceiver extends BroadcastReceiver {

	#!/bin/bash

	#Force file syncronization and lock writes
	mongo admin --eval "printjson(db.fsyncLock())"

	MONGODUMP_PATH="/usr/bin/mongodump"
	MONGO_HOST="prod.example.com"
	MONGO_PORT="27017"
	MONGO_DATABASE="dbname"