andersr

#Alien Sandwich A numbered list of instructions for explaining to an alien how to make a peanut butter and jelly sandwich

###Collect and define items needed to make a Peanut Butter and Jelly Sandwich.

• "PBJ-sandwich" = Peanut Butter and Jelly Sandwich (the thing we will be making)
• "pb-jar" = the cylindrical object in front of you containing a brown substance
• "jelly-jar" = the cylindrical object in front of you containing a red substance
• "plate" = the flat white object in front of you
• "bread-loaf" = the brown, rectangle-shaped thing in front of you that is soft to the touch
• "knife" = the narrow, silver-colored thing in front you with one side that is sharp to the touch. The side that is not sharp is the side you grasp. The knife can be used for two purposes: cutting and spreading. When used for cutting, grasp the knife and face the sharp part downward. When used for spreading, grasp the knife and and turn the knife so that the sharp part is horizontal.

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#Pseudocode Example: A Signup Form ##Entities

• Email field: input type = email, placeholder: “[email protected]”
• Password field: input type = password, placeholder: “Password”
• Password confirmation field: input type = password, placeholder: “Password again”
• Signup submit: value: “Sign Up”, default state, disabled

##Signup Flow/Logic

###On leave focus of email field

andersr

require 'rack'

class App

  def call(env)

    [200, {'Content-Type'=>'text/plain'}, ["Hello Rack!"]]


  end

andersr

# each
def my_each(array)
  i = 0 
  until i == array.length do
    yield(array[i])
    i+=1
  end
  array
end

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unsorted_files = [
  "foo-1.10.2.ext",
  "foo-1.11.ext",
  "foo-1.3.ext",
  "foo-1.50.ext",
  "foo-1.8.7.ext",
  "foo-1.9.3.ext",
  "foo-1.ext",
  "foo-10.1.ext",
  "foo-10.ext",

andersr

def normalize_path(path)
  "#{"#{Dir.pwd}/" if relative_path?(path)}#{path}"
end

def relative_path?(path)
  !absolute_path?(path)
end

def absolute_path?(path)
  path.start_with?("/")

andersr

# Write a method that takes a sentence and returns it with each word reversed in place.

my_sentence = "This is a sentence we'll use to reverse each word in the sentence."

def reversed_words(sentence)
  reversed_words_sentence = sentence.split(/[" ",.]/).collect do |word|
    word.reverse
  end
  reversed_words_sentence.join(" ")
end

andersr

# Create a method, apple_picker, that will pick all the apples out of an array. Implement it with collect and then implement it with select. Write a sentence about how select differs from collect.

fruits = ["orange", "banana", "apple", "orange", "apple", "banana", "orange", "apple"]

#with collect
def apple_picker_collect(array)
  array.collect do |array_element|
    array_element if array_element == "apple"
  end
end

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my_deli_line = []

def take_a_number(deli_line, customer_name)
  deli_line << customer_name
end

def current_line(deli_line)
  print "Current line: "
  deli_line.each_with_index do |person_in_line, i|
    print "#{i + 1}. #{person_in_line}  "

andersr

# Create a method, apple_picker, that will pick all the apples out of an array. Implement it with collect and then implement it with select. Write a sentence about how select differs from collect.

fruits = ["orange", "banana", "apple", "orange", "apple", "banana", "orange", "apple"]

#with collect
def apple_picker_collect(array)
  array.collect do |array_element|
    array_element if array_element == "apple"
  end
end