initial pull request

ch09-writing-your-own-methods/ask.rb

@@ -1,3 +1,30 @@
 def ask question
-  # your code here
-end
+  while true
+    puts question
+    reply = gets.chomp.downcase
+
+    if reply == "yes"
+      return true
+    elsif reply == "no"
+      return false
+    else
+      puts "Please answer \"yes\" or \"no\""
+    end
+  end
+end
+
+puts "Hello, and thank you for..."
+puts
+ask "Do you like eating tacos?" # Ignore this return value
+ask "Do you like eating burritos?" # And this one
+wets_bed = ask "Do you wet the bed?" # Save this return value
+ask "Do you like eating chimichangas?"
+ask "Do you like eating sopapillas?"
+puts "Just a few more questions..."
+ask "Do you like drinking horchata?"
+ask "Do you like eating flautas?"
+puts
+puts "DEBRIEFING:"
+puts "Thank you for..."
+puts
+puts "wets_bed"

ch09-writing-your-own-methods/old_school_roman_numerals.rb

@@ -1,3 +1,20 @@
 def old_roman_numeral num
-  # your code here
-end
+  # reference:
+  # I = 1, V = 5, X = 10, L = 50
+  # C = 100, D = 500, M = 1000
+
+  roman = ""
+
+  roman << ( "M" * (num / 1000))
+  roman << ( "D" * ((num % 1000) / 500))
+  roman << ( "C" * ((num % 500) / 100 ))
+  roman << ( "L" * ((num % 100) / 50 ))
+  roman << ( "X" * ((num % 50) / 10 ))
+  roman << ( "V" * ((num % 10) / 5 ))
+  roman << ( "I" * ((num % 5) / 1 ))
+
+  #puts "The number #{num}, is converted to:\n#{roman} in roman numerals"
+  roman
+end
+
+puts old_roman_numeral 555

ch09-writing-your-own-methods/roman_numerals.rb

@@ -1,3 +1,54 @@
 def roman_numeral num
-  # your code here
-end
+  # reference:
+  # I = 1, V = 5, X = 10, L = 50
+  # C = 100, D = 500, M = 1000
+
+  thous = (num / 1000) 
+  hunds = (num % 1000 / 100) 
+  tens = (num % 100 / 10) 
+  ones = (num % 10 )
+
+  roman = 'M' * thous # start building the roman number
+                      # starting with the largest (thousands)
+
+
+  # conversion code for integer to roman is the same
+  # as the old_school_roman_numerals
+
+  # 9 takes 1 before 10
+  # 4 takes 1 before 5
+  # giving the code instructions for case of 9 and 4 for each group
+  # respectively (hundreds, tens, ones)
+
+
+  if hunds == 9 
+    roman = roman + "CM"
+  elsif hunds == 4
+    roman = roman + "CD"
+  else
+    roman = roman + 'D' * (num % 1000 / 500) 
+    roman = roman + 'C' * (num % 500 / 100) 
+  end
+
+  if tens == 9 
+    roman = roman + 'XC' 
+  elsif tens == 4 
+    roman = roman + 'XL' 
+  else 
+    roman = roman + 'L' * (num % 100 / 50) 
+    roman = roman + 'X' * (num % 50 / 10) 
+  end
+
+  if ones == 9 
+    roman = roman + 'IX' 
+  elsif ones == 4 
+    roman = roman + 'IV' 
+  else 
+    roman = roman + 'V' * (num % 10 / 5) 
+    roman = roman + 'I' * (num % 5 / 1) 
+  end
+
+  roman
+
+end
+

ch10-nothing-new/dictionary_sort.rb

@@ -1,3 +1,6 @@
 def dictionary_sort arr
-  # your code here
-end
+	arr.sort_by { |word| word.downcase }
+end
+
+#words = ['Can','feel','singing.','like','A','can',"b","B"]
+#puts dictionary_sort words

ch10-nothing-new/english_number.rb

@@ -1,3 +1,82 @@
 def english_number number
-  # your code here
+  if number < 0 # No negative numbers.
+    return "Please enter a number that isn't negative."
+  elsif number == 0
+    return "zero"
+  end
+
+  num_string = "" # start with empy number string
+
+  ones_place = ["one", "two", "three",
+    "four", "five", "six",
+    "seven", "eight", "nine"]
+
+    tens_place = ["ten", "twenty", "thirty",
+      "forty", "fifty", "sixty",
+      "seventy", "eighty", "ninety"]
+
+      teenagers = ["eleven", "twelve", "thirteen",
+        "fourteen", "fifteen", "sixteen",
+        "seventeen", "eighteen", "nineteen"]
+
+        zillions = [["hundred", 2],["thousand", 3],
+        ["million", 6],["billion", 9],["trillion", 12],
+        ["quadrillion", 15],["quintillion", 18],
+        ["sextillion", 21],["septillion", 24],
+        ["octillion", 27],["nonillion", 30],
+        ["decillion", 33],["undecillion", 36],
+        ["duodecillion", 39],["tredecillion", 42],
+        ["quattuordecillion", 45],["quindecillion", 48],
+        ["sexdecillion", 51],["septendecillion", 54],
+        ["octodecillion", 57],["novemdecillion", 60],
+        ["vigintillion", 63],["googol", 100]]
+
+
+        left_number = number 
+
+        while zillions.length > 0
+          zil_pair = zillions.pop #removes last array pair until reaches correct
+          zil_name = zil_pair[0] # takes the name of number
+
+          # how many
+          zil_base = 10 ** zil_pair[1] 
+          write = left_number/zil_base
+          left_number = left_number - write*zil_base
+
+          if write > 0
+            prefix = english_number write # call method
+            num_string = num_string + prefix + " " + zil_name
+            if left_number > 0
+
+              num_string = num_string + " " # building the number
+            end
+          end
+
+        end
+
+        write = left_number/10
+        left_number = left_number - write*10
+        if write > 0
+          if ((write == 1) and (left_number > 0))
+            num_string = num_string + teenagers[left_number-1]
+            left_number = 0
+          else
+            num_string = num_string + tens_place[write-1]
+          end
+          if left_number > 0
+            num_string = num_string + "-"
+          end
+        end
+        write = left_number
+        left_number = 0
+        if write > 0
+          num_string = num_string + ones_place[write-1]
+        end
+
+        num_string
 end
+
+#puts english_number(101)
+#puts english_number(234) 
+#puts english_number(3211) 
+#puts english_number(999999)

ch10-nothing-new/ninety_nine_bottles_of_beer.rb

@@ -1 +1,99 @@
-# your code here
+def english_number number
+  if number < 0 # No negative numbers.
+    return "Please enter a number that isn't negative."
+  elsif number == 0
+    return "zero"
+  end
+
+  num_string = "" # start with empy number string
+
+  ones_place = ["one", "two", "three",
+    "four", "five", "six",
+    "seven", "eight", "nine"]
+
+    tens_place = ["ten", "twenty", "thirty",
+      "forty", "fifty", "sixty",
+      "seventy", "eighty", "ninety"]
+
+      teenagers = ["eleven", "twelve", "thirteen",
+        "fourteen", "fifteen", "sixteen",
+        "seventeen", "eighteen", "nineteen"]
+
+        zillions = [["hundred", 2],["thousand", 3],
+        ["million", 6],["billion", 9],["trillion", 12],
+        ["quadrillion", 15],["quintillion", 18],
+        ["sextillion", 21],["septillion", 24],
+        ["octillion", 27],["nonillion", 30],
+        ["decillion", 33],["undecillion", 36],
+        ["duodecillion", 39],["tredecillion", 42],
+        ["quattuordecillion", 45],["quindecillion", 48],
+        ["sexdecillion", 51],["septendecillion", 54],
+        ["octodecillion", 57],["novemdecillion", 60],
+        ["vigintillion", 63],["googol", 100]]
+
+
+        left_number = number 
+
+        while zillions.length > 0
+          zil_pair = zillions.pop #removes last array pair until reaches correct
+          zil_name = zil_pair[0] # takes the name of number
+
+          # how many
+          zil_base = 10 ** zil_pair[1] 
+          write = left_number/zil_base
+          left_number = left_number - write*zil_base
+
+          if write > 0
+            prefix = english_number write # call method
+            num_string = num_string + prefix + " " + zil_name
+            if left_number > 0
+
+              num_string = num_string + " " # building the number
+            end
+          end
+
+        end
+
+        write = left_number/10
+        left_number = left_number - write*10
+        if write > 0
+          if ((write == 1) and (left_number > 0))
+            num_string = num_string + teenagers[left_number-1]
+            left_number = 0
+          else
+            num_string = num_string + tens_place[write-1]
+          end
+          if left_number > 0
+            num_string = num_string + "-"
+          end
+        end
+        write = left_number
+        left_number = 0
+        if write > 0
+          num_string = num_string + ones_place[write-1]
+        end
+
+        num_string
+end
+
+# use any number below to set the lyrics of the song
+num_at_start = 99 # 99 beers! 
+num_at_start = 5 # change to 9999 if you want num_now = num_at_start while num_now > 2 puts english_number(num_now).capitalize + ' bottles of beer on the wall, ' + english_number(num_now) + ' bottles of beer!' num_now = num_now - 1 puts 'Take one down, pass it around, ' + english_number(num_now) + ' bottles of beer on the wall!' end puts "Two bottles of beer on the wall, two bottles of beer!" puts "Take one down, pass it around, one bottle of beer on the wall!" puts "One bottle of beer on the wall, one bottle of beer!" puts "Take one down, pass it around, no more bottles of beer on the wall!"
+
+num_now = num_at_start 
+
+# using a while loop to call the enlish_number function
+# converting number to word_number for a given number
+# up to 3
+# then change text for last 2 bottles
+
+while num_now > 2 
+  puts english_number(num_now).capitalize + ' bottles of beer on the wall, ' + english_number(num_now) + ' bottles of beer!' 
+  num_now = num_now - 1 
+  puts 'Take one down, pass it around, ' + english_number(num_now) + ' bottles of beer on the wall!' 
+end 
+
+puts "Two bottles of beer on the wall, two bottles of beer!" 
+puts "Take one down, pass it around, one bottle of beer on the wall!" 
+puts "One bottle of beer on the wall, one bottle of beer!" 
+puts "Take one down, pass it around, no more bottles of beer on the wall!"

ch10-nothing-new/shuffle.rb

@@ -1,3 +1,7 @@
-def shuffle arr
-  # your code here
-end
+def shuffle(array)
+  array.shuffle
+end
+
+
+#test_array = ["hi",5,"6",["hey","you"],"Einstein"]
+#puts shuffle(test_array)

ch10-nothing-new/sort.rb

@@ -1,3 +1,28 @@
 def sort arr
-  # your code here
-end
+  recursive_sort(arr, [])
+end
+
+def recursive_sort(unsorted_arr, sorted_arr)
+	if unsorted_arr.length < 1
+    return sorted_arr
+  end
+
+  last_unsorted_word = unsorted_arr.pop
+  new_arr = []
+
+  unsorted_arr.each do |word|
+    if word < last_unsorted_word
+    new_arr << last_unsorted_word
+    last_unsorted_word = word
+    else
+      new_arr << word
+    end
+  end
+
+  sorted_arr << last_unsorted_word
+  recursive_sort(new_arr, sorted_arr)
+end
+
+#test_array = ["orange","apple","banana","cherry","orange","watermelon"]
+#puts test_array.length
+#puts sort(test_array)

ch11-reading-and-writing/build_a_better_playlist.rb

@@ -1,3 +1,38 @@
 def music_shuffle filenames
-  # your code here
+
+  filenames = filenames.sort
+  len = filenames.length
+
+  # shuffle twice.
+  2.times do
+    l_idx = 0 
+    r_idx = len/2 #
+    shuf = []
+
+
+    while shuf.length < len
+      if shuf.length%2 == 0
+
+        shuf.push(filenames[r_idx])
+        r_idx = r_idx + 1
+      else
+
+        shuf.push(filenames[l_idx])
+        l_idx = l_idx + 1
+      end
+    end
+
+    filenames = shuf
+  end
+
+  arr = []
+  cut = rand(len) 
+  idx = 0
+
+  while idx < len
+    arr.push(filenames[(idx+cut)%len])
+    idx = idx + 1
+  end
+
+  arr
 end