danhealy

# Throw this file into your app folder, like app/lib/serializable.rb
#
# In your main.rb or wherever you require files:
#   require 'app/lib/serializable.rb'
#
# In each class you want to automatically serialize:
#   class Foo
#     include Serializable
#     ...
#   end

danhealy

Code Sample - Log Parsing

I created this code sample in December, 2018 for an interview. The task is to parse a log file containing the following format:

<#>, C<#>, P<#>

Where the first number is a "timestamp," the second is a Client/Customer ID #, and the third is a Page #. The entry represents a customer visiting a specific page at a specific time.

It's assumed that the log file contains timestamps in ascending order.

danhealy

# Initialize an array of 50 random integers. If you know ahead of time that the
# elements will be unique, use Set class instead for performance improvements
array = Array.new(50) do rand(100) end

# Ruby 2.4 and later has the Array#sum method which could also be implemented as
# a simple #inject call in earlier versions, it's also mixed in with Rails

avg = array.sum / array.length.to_f # to_f required for float precision

# Removing the min and max of the array by sorting.  This particular method

danhealy

04714a3cc0a7adb56767f592a79c5c74b83e8ed6f4cf26831a5c5f0d07b54ac28d7fe519dd3350894abc4b29d57eb60a8b3609aac96e095ba384d556bfa7d22377;TheCrow1213

danhealy

diff --git a/src/sprite.cpp b/src/sprite.cpp
index 450e5f4..f3320c8 100644
--- a/src/sprite.cpp
+++ b/src/sprite.cpp
@@ -54,6 +54,25 @@ sprite_new(VALUE rcv, SEL sel, VALUE name)
     return rb_class_wrap_new((void *)sprite, rcv);
 }

+/// @method #create_with_image(data, len)
+/// Creates a sprite from +data+ stream buffer image data and +len+ length

danhealy

batch_size             = 100  # Items per request
parallel_requests      = 4
total_items_to_request = 4000

iterations = (total_items_to_request / (parallel_requests * batch_size))  # => 10

parallel_requests.times do |seg|
  Process.fork do
    c = AWS::DynamoDB::Client.new(
      :access_key_id      => "...",

danhealy

#!/usr/bin/env ruby

class Array
  def sum
    inject(0.0) { |result, el| result + el }
  end
  
  def mean
    sum / size
  end

danhealy

source :rubygems

gem "eventmachine", ">= 1.0.0.beta.3"
gem 'goliath', :git => 'git://github.com/postrank-labs/goliath.git'
gem 'em-synchrony', :git => 'git://github.com/igrigorik/em-synchrony.git'

danhealy

ruby-1.9.2-p290@sandbox @/sandbox [11:58:10] :) $ ab -n 100 -c 1 http://goliath-demo.herokuapp.com/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking goliath-demo.herokuapp.com (be patient).....done


Server Software:        PostRank
Server Hostname:        goliath-demo.herokuapp.com

danhealy

// platform/iphone/OpenFeintExtension.h

#import "OpenFeint.h"
#import "OFAchievement.h"
#import "OFAchievementService.h"