I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!
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- node.js
- Installation paths: use one of these techniques to install node and npm without having to sudo.
- Node.js HOWTO: Install Node+NPM as user (not root) under Unix OSes
- Felix's Node.js Guide
- Creating a REST API using Node.js, Express, and MongoDB
- Node Cellar Sample Application with Backbone.js, Twitter Bootstrap, Node.js, Express, and MongoDB
- JavaScript Event Loop
- Node.js for PHP programmers
Roll your own iPython Notebook server with Amazon Web Services (EC2) using their Free Tier.
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In the following we will be using R’s “restarts” feature to implement the state machine that drives generators in languages such as Python. Generators allow lazily generating values on demand: a consumer invokes a generator, and consumes values as they are produced. A new value is only produced once the previous one has been consumed.
#!/usr/bin/env python | |
# Copyright (C) 2010, Scott W. Dunlop <swdunlop at gmail.com> | |
# | |
# Redistribution and use in source and binary forms, with or without | |
# modification, are permitted provided that the following conditions are met: | |
# | |
# * Redistributions of source code must retain the above copyright | |
# notice, this list of conditions and the following disclaimer. | |
# * Redistributions in binary form must reproduce the above copyright | |
# notice, this list of conditions and the following disclaimer in the |
import numpy as np | |
import pymc | |
import pdb | |
def unconditionalProbability(Ptrans): | |
"""Compute the unconditional probability for the states of a | |
Markov chain.""" | |
m = Ptrans.shape[0] |
I wanted to set up one of my Raspberry Pi's as a data dashboard, pushing sensor data to a web interface that's easy to digest. I decided to use Shopify's Dashing framework. Dashing is based on Sinatra, and is pretty lightweight.
Dashing does require Ruby 1.9.3 to run. In addition, it makes use of the execjs
gem, which needs to have a working Javascript interpreter available. Originally, I tried to get therubyracer working, but decided to switch over to Node.js when I ran into roadblocks compiling V8.
One warning: The RPi is a very slow system compared with modern multi-core x86-style systems. It's pretty robust, but compiling all this complex software taxes the system quite a bit. Expect that it's going to take at least half a day to get everything going.
<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta http-equiv="Content-type" content="text/html; charset=utf-8" /> | |
<title>Stripe Sample Form</title> | |
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script> | |
<script type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.8.1/jquery.validate.min.js"></script> | |
<script type="text/javascript" src="https://js.stripe.com/v1/"></script> | |
<script type="text/javascript"> |