joshwyatt

Organizing Multiple Asynchronous Function Calls

Using Callbacks and Continuation Passing Style

const request = require('request');

doAsyncMath('2+15', function(result) {
  doAsyncMath(`${result}*3`, function(result) {
    doAsyncMath(`${result}*10`, console.log);

joshwyatt

Technical Interviewing at a Whiteboard Cheatsheet

Throughout the entirety of the interview:

• Be friendly
• Be talking. Especially when you are not sure what to do next, or, are thinking about what you will do, you need to be sharing these thoughts with your interviewer
• Be using eye contact to check in with your interviewer
• Be honest (about what you've done, what you don't know)
• Be enthusiastic about a challenge
• Be a delightful coworker

joshwyatt

There are situations in OOP where we may wish to protect access to instance properties.

In the following example we will make a bank account constructor in the hopes that by including a pin, will be protected.

const BankAccount = function(initialBalance, pin) {
  this.balance = initialBalance;
  this.pin = pin;
}

joshwyatt

How to make a globally available executable script in the scripting language of your choice

• Locate the path to the interpreter for the language you are writing in with the which command.

    which node
    which python
    which bash
    which ruby
  

• Add that path as an interpreter directive (using #!) on the first line of your script. For example if you want to write a node script and which node returned /usr/local/bin/node, the first line of your script should be:

joshwyatt

Deploy MEAN application with Docker

Install Docker (for OS X)

(I'm not familiar with installation onto a Linux machine. Please follow the instructions on the Docker Installation page.)

[ ] If you're using OS X go directly to the boot2docker installation page, download the latest Boot2Docker pkg and install it on your laptop. This will install both Docker and Boot2Docker. The Docker installations docs have the following to say about Boot2Docker, which solves the issue for OS X users that Docker must be run on a host system with a Linux kernel.

Because the Docker daemon uses Linux-specific kernel features, you can't run Docker natively in OS X. Instead, you must install the Boot2Docker application. The application includes a VirtualBox Virtual Machine (VM), Docker itself, and the Boot2Docker management tool.