jmromer

class Integer
  def is_prime?
    return false if self < 2
    (2..Math::sqrt(self)).each do |i|
      return false if self % i == 0
    end
    return true
  end
end

jmromer

require 'benchmark'
 
class Integer
  def is_prime?
    return true if self == 2
    return false if self < 2 || self.even?
    
    i = 3
    while i**2 <= self 
      return false if self % i == 0

jmromer

#!/usr/bin/env python

import glob
import os
import pickle
import re
import subprocess
import sys

import numexpr as ne

jmromer

Lecture 1: Introduction to Research — [📝Lecture Notebooks] [▶️Video]
Lecture 2: Introduction to Python — [📝Lecture Notebooks] [▶️Video]
Lecture 3: Introduction to NumPy — [📝Lecture Notebooks] [▶️Video]
Lecture 4: Introduction to pandas — [📝Lecture Notebooks] [▶️Video]
Lecture 5: Plotting Data — [📝Lecture Notebooks] [[▶️Vide

jmromer

Setting up Heroku and Cloudflare (the right way)

The following outlines how to setup Heroku + Cloudflare with a full SSL certificate. What this means is that communication between the browser and the Cloudflare CDN is encrypted as well as communication between Cloudflare and Heroku’s origin server. Follow these steps exactly and the setup is a breeze.

Step 1: Set up domain names in Heroku

First you want to add the root domain and the www domain to heroku. You do this by clicking into your production application, then going to settings and then scrolling down to Domains and certificates.

Here you will add <your_domain>.com and www.<your_domain>.com. This will give you two CNAME records. They will look something like <your_domain>.com.herokudns.com and www.<your_domain>.com.herokudns.com.

Step 2: Add CNAME records to Cloudfare.