AJFaraday

class DumbSearch
  def initialize(min, max)
    #@min = min
    #@max = max
    @guessed = false
    @next_guess = 50
  end

  attr_reader :next_guess, :guessed

AJFaraday

s = "It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all going direct the other way – in short, the period was so far like the present period, that some of its noisiest authorities insisted on its being received, for good or for evil, in the superlative degree of comparison only."

vowels = %w{a e i o u}

vowels.each_with_index do |vowel, index|
  s.gsub!(vowel,"SUB#{index}SUB")
end
vowels.each_with_index do |vowel, index|
  s.gsub!("SUB#{index}SUB", vowels[(index+1)%vowels.length])
end

AJFaraday

#Dear Test Actually attendees

My talk at Test Actually (on the 16th of August, 2017), will include some live bug fixing.
I already have an app which is rich in bugs and glitches, but no bug reports to work from.

You can help!

Feel free to find an issue in my app, a simple inventory tracker for a library, which may be used in the talk.
(You will need a GitHub account)

AJFaraday

# found with ruby 2.2.2 (but I think it must have worked on 1.9, too.

def meth(arg)
  argument.is_a?(String) ? 'a' : 'b'
end 

meth('foo')
# NameError: undefined local variable or method `argument' for main:Object
# This is completely expected, I've never defined `argument`.

AJFaraday

def meth
  if false
    puts 'not here'
  end
else
  puts 'WAT'
end 
# warning: else without rescue is useless

meth

AJFaraday

> u.memberships.any?
#   (2.9ms)  SELECT COUNT(*) FROM "MEMBERSHIPS" WHERE "MEMBERSHIPS"."USER_ID" = 10080
# => true 
> u.memberships.none?
#  Membership Load (2.4ms)  SELECT "MEMBERSHIPS".* FROM "MEMBERSHIPS" WHERE "MEMBERSHIPS"."USER_ID" = 10080 ORDER BY team_id
#  Team Load (6.0ms)  SELECT "TEAMS".* FROM "TEAMS" WHERE "TEAMS"."ID" IN (1)
# => false 

# The any? method is counting the number of memberships, then presumably asking in Ruby if the number is more than 1.

AJFaraday

class Foo
  def my_method
    puts 'original'
  end
end
module Bar
  def my_method
    puts 'overridden'
  end
end

AJFaraday

# How can this line throw an error?
@folder = object.respond_to?(:project_element) ? object.project_element : nil

# The error is this:
# undefined method `project_element' for #<Report::Event:0x007fbb6eb8ca78>

# Surely This should be protected, right?

# -----------------------------

AJFaraday

require 'rspec'

describe 'something' do
  it 'should know what valid means' do
    record = Object.new
    record.should be_valid?
    # undefined method 'valid??' for #<Object#0x0000000f453d063>
  end
end 

AJFaraday

$('body').on(
  'click', 
  'a#my_element',
  function(e) {
    e.preventDefault();
    $('body').on(
      'click', 
      'a#my_element',
      function(e) {
        e.preventDefault();