JeffCohen

# Run this script with:
# curl -sL https://gist.github.com/JeffCohen/60e8d8e3be66d4f167b1249fb1bd451a/raw | bash -E -

cd

echo
echo "Web Development Setup Script for Mac, Version 0.15"
echo
echo "This will take about 25 minutes.  Do not turn off your computer until this is complete."
echo "All progress is being recorded to a file named install-log.txt"

JeffCohen

# This script is for Windows 10.
# The Windows Subsystem for Linux must be enabled before running this script.
#
# Run this script from a Windows bash session with:
#
# curl -sL https://gist.github.com/JeffCohen/8b81c334c313340d50810a88c0df2bfb/raw | bash -E -

cd

echo

JeffCohen

# Be sure to restart your server when you modify this file.

# You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
# Rails.backtrace_cleaner.add_silencer { |line| line =~ /lib/ }

# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code.
# Rails.backtrace_cleaner.remove_silencers!

module ActionDispatch
  class ExceptionWrapper

JeffCohen

# Python 3
#
# https://docs.python.org/3/howto/urllib2.html
# http://api.open-notify.org/astros.json

# This code works.  Run it to verify.
# Then read the challenge at the bottom of this file.

import urllib.request
import json

JeffCohen

# (Run this code with Python 3 only.)
#
# This program decodes a secret message by advancing each
# letter by 2 places.  Spaces and punctuation should remain
# unchanged.

# Examples:
#   "nwrfml"     decodes into:    "python"
#   "ynnjc"      decodes into:    "apple"
#

JeffCohen

# Example usage:
# Product.sample    => returns a Product
# Product.sample(3) => returns an array of 3 products
# Product.sample(3, true).order('title')   => allows chaining

class ActiveRecord::Base

  # Choose rows at random
  def self.sample(n = 1, keep_as_relation = false)
    rows = offset(rand(0...(count-n-1))).limit(n)

JeffCohen

defmodule HelloPhoenix.MoviesController do
  use HelloPhoenix.Web, :controller
  require Logger

  def show(conn, %{"id" => query}) do

    results = fetch_by_id(query)

    # results is a hash that might have a key named "Error"
    # in which case we need to try to query by title instead of id

JeffCohen

Installation

Fairly straightforward, but installing postgres via brew wouldn't work until I followed the instructions in this comment: Homebrew/legacy-homebrew#35240 (comment)

Elixir-to-Ruby Dictionary

Elixir	Ruby
mix	ruby
hex	rubygems

JeffCohen

class TreeNode:
  def __init__(self, content):
    self.content = content
    self.yes = None
    self.no = None

  def is_question(self):
    return (self.yes != None or self.no != None)

# Prepare the decision tree

JeffCohen

# I don't understand the output (shown below).
# L is local to f, right?  So how are the
# contents of L remembered between invocations?

def f(a, L=[]):
    L.append(a)
    return L

print(f(1))
print(f(2))