davidbalbert

This is a partial implementation of Piumarta and Warth's Open, extensible object models paper in Ruby. It is the simpler implementation where bind returns a method rather than a closure that wraps the method and some arbitrary piece of data. It also doesn't implement any method caching. I'm not super happy with the the split between in the "low level" Ruby object system, and the "higher level" system that we're implementing, but I don't have time to do a redesign before publishing today's PotW :).

Running the program will drop you into a shell where you can play with the object model. It's nicer if you have pry installed because then you'll have access to local variables like symbol and s_delegated.

davidbalbert

module Enumerable
  def reductions(sym = nil, &block)
    raise LocalJumpError, "no block given" unless sym || block
    
    if sym
      block = sym.to_proc
    end
    
    arr = to_a
    

davidbalbert

Aardvark
Abyssinian
Accelerator
Accordion
Account
Accountant
Acknowledgment
Acoustic
Acrylic
Act

davidbalbert

# Returns the number of user+thread combinations with more than one visited
# status, this should be greater than zero before the fix and zero after the
# fix.
VisitedStatus.group([:user_id, :thread_id]).having("COUNT(*) > 1").count.size

# The number of user+thread combinations with at least one visited status. This
# number should remain the same before and after the fix.
VisitedStatus.group([:user_id, :thread_id]).count.size

# The fix: Group all visited statuses by user+thread, select the visited statuses.

davidbalbert

# This will be pasted into the REPL

require 'csv'

# these were extracted from the first line of the CSV
GoogleGroupContact = Struct.new(:email_address, :nickname, :group_status, :email_status, :email_preference, :posting_permissions, :join_year, :join_month, :join_day, :join_hour, :join_minute, :join_second, :time_zone)

class InteractiveContactFinder
  def self.find_all(contacts)
    @@done = false

davidbalbert

slashes = ["|", "/", "-", "\\"]

slashes.cycle do |s|
  system "clear"
  puts ":#{s}"
  sleep 0.3
end

davidbalbert

(def hmm-state (atom {:value "Hmm..."}))

(defn hmm [state owner]
  (reify
    om/IRender
    (render [_]
      (om.dom/textarea #js {:value (:value state)
                            :onChange (fn [e] (.log js/console (.. e -target -value)))}))))

(om/root

davidbalbert

Keybase proof

I hereby claim:

• I am davidbalbert on github.
• I am davidbalbert (https://keybase.io/davidbalbert) on keybase.
• I have a public key whose fingerprint is C59D 970A 2A49 D78B ACE7 6722 F447 4DD8 FC80 DAB5

To claim this, I am signing this object:

davidbalbert

class Array
  def to_my_h
    MyHash[self]
  end
end

class Hash
  def to_my_h
    to_a.to_my_h
  end

davidbalbert

/*
 * Idiomatic-ish JavaScript. Constructor functions use the `new`
 * keyword, but we don't use prototype objects.
 */

function Empty () {
    this.isEmpty = true;
    this.contains = function (i) { return false; };
    this.insert = function (i) { return new Insert(this, i); };
    this.union = function (s) { return s; };