incorperating ECS into dragonruby

1 files changed, 307 insertions, 0 deletions

diff --git a/app/old/repl.rb b/app/old/repl.rb
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+# ===============================================================
+# Welcome to repl.rb
+# ===============================================================
+# You can experiement with code within this file. Code in this
+# file is only executed when you save (and only excecuted ONCE).
+# ===============================================================
+
+# ===============================================================
+# REMOVE the "x" from the word "xrepl" and save the file to RUN
+# the code in between the do/end block delimiters.
+# ===============================================================
+
+# ===============================================================
+# ADD the "x" to the word "repl" (make it xrepl) and save the
+# file to IGNORE the code in between the do/end block delimiters.
+# ===============================================================
+
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  puts "The result of 1 + 2 is: #{1 + 2}"
+end
+
+# ====================================================================================
+# Ruby Crash Course:
+# Strings, Numeric, Booleans, Conditionals, Looping, Enumerables, Arrays
+# ====================================================================================
+
+# ====================================================================================
+#  Strings
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  message = "Hello World"
+  puts "The value of message is: " + message
+  puts "Any value can be interpolated within a string using \#{}."
+  puts "Interpolated message: #{message}."
+  puts 'This #{message} is not interpolated because the string uses single quotes.'
+end
+
+# ====================================================================================
+#  Numerics
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  a = 10
+  puts "The value of a is: #{a}"
+  puts "a + 1 is: #{a + 1}"
+  puts "a / 3 is: #{a / 3}"
+end
+
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  b = 10.12
+  puts "The value of b is: #{b}"
+  puts "b + 1 is: #{b + 1}"
+  puts "b as an integer is: #{b.to_i}"
+  puts ''
+end
+
+# ====================================================================================
+#  Booleans
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  c = 30
+  puts "The value of c is #{c}."
+
+  if c
+    puts "This if statement ran because c is truthy."
+  end
+end
+
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  d = false
+  puts "The value of d is #{d}."
+
+  if !d
+    puts "This if statement ran because d is falsey, using the not operator (!) makes d evaluate to true."
+  end
+
+  e = nil
+  puts "Nil is also considered falsey. The value of e is: #{e}."
+
+  if !e
+    puts "This if statement ran because e is nil (a falsey value)."
+  end
+end
+
+# ====================================================================================
+#  Conditionals
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  i_am_true  = true
+  i_am_nil   = nil
+  i_am_false = false
+  i_am_hi    = "hi"
+
+  puts "======== if statement"
+  i_am_one = 1
+  if i_am_one
+    puts "This was printed because i_am_one is truthy."
+  end
+
+  puts "======== if/else statement"
+  if i_am_false
+    puts "This will NOT get printed because i_am_false is false."
+  else
+    puts "This was printed because i_am_false is false."
+  end
+
+  puts "======== if/elsif/else statement"
+  if i_am_false
+    puts "This will NOT get printed because i_am_false is false."
+  elsif i_am_true
+    puts "This was printed because i_am_true is true."
+  else
+    puts "This will NOT get printed i_am_true was true."
+  end
+
+  puts "======== case statement "
+  i_am_one = 1
+  case i_am_one
+  when 10
+    puts "case equaled: 10"
+  when 9
+    puts "case equaled: 9"
+  when 5
+    puts "case equaled: 5"
+  when 1
+    puts "case equaled: 1"
+  else
+    puts "Value wasn't cased."
+  end
+
+  puts "======== different types of comparisons"
+  if 4 == 4
+    puts "equal (4 == 4)"
+  end
+
+  if 4 != 3
+    puts "not equal (4 != 3)"
+  end
+
+  if 3 < 4
+    puts "less than (3 < 4)"
+  end
+
+  if 4 > 3
+    puts "greater than (4 > 3)"
+  end
+
+  if ((4 > 3) || (3 < 4) || false)
+    puts "or statement ((4 > 3) || (3 < 4) || false)"
+  end
+
+  if ((4 > 3) && (3 < 4))
+    puts "and statement ((4 > 3) && (3 < 4))"
+  end
+end
+
+# ====================================================================================
+# Looping
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  puts "======== times block"
+  3.times do |i|
+    puts i
+  end
+  puts "======== range block exclusive"
+  (0...3).each do |i|
+    puts i
+  end
+  puts "======== range block inclusive"
+  (0..3).each do |i|
+    puts i
+  end
+end
+
+# ====================================================================================
+#  Enumerables
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  puts "======== array each"
+  colors = ["red", "blue", "yellow"]
+  colors.each do |color|
+    puts color
+  end
+
+  puts '======== array each_with_index'
+  colors = ["red", "blue", "yellow"]
+  colors.each_with_index do |color, i|
+    puts "#{color} at index #{i}"
+  end
+end
+
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  puts "======== single parameter function"
+  def add_one_to n
+    n + 5
+  end
+
+  puts add_one_to(3)
+
+  puts "======== function with default value"
+  def function_with_default_value v = 10
+    v * 10
+  end
+
+  puts "passing three: #{function_with_default_value(3)}"
+  puts "passing nil: #{function_with_default_value}"
+
+  puts "======== Or Equal (||=) operator for nil values"
+  def function_with_nil_default_with_local a = nil
+    result   = a
+    result ||= "or equal operator was exected and set a default value"
+  end
+
+  puts "passing 'hi': #{function_with_nil_default_with_local 'hi'}"
+  puts "passing nil: #{function_with_nil_default_with_local}"
+end
+
+# ====================================================================================
+#  Arrays
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  puts "======== Create an array with the numbers 1 to 10."
+  one_to_ten = (1..10).to_a
+  puts one_to_ten
+
+  puts "======== Create a new array that only contains even numbers from the previous array."
+  one_to_ten = (1..10).to_a
+  evens = one_to_ten.find_all do |number|
+    number % 2 == 0
+  end
+  puts evens
+
+  puts "======== Create a new array that rejects odd numbers."
+  one_to_ten = (1..10).to_a
+  also_even = one_to_ten.reject do |number|
+    number % 2 != 0
+  end
+  puts also_even
+
+  puts "======== Create an array that doubles every number."
+  one_to_ten = (1..10).to_a
+  doubled = one_to_ten.map do |number|
+    number * 2
+  end
+  puts doubled
+
+  puts "======== Create an array that selects only odd numbers and then multiply those by 10."
+  one_to_ten = (1..10).to_a
+  odd_doubled = one_to_ten.find_all do |number|
+    number % 2 != 0
+  end.map do |odd_number|
+    odd_number * 10
+  end
+  puts odd_doubled
+
+  puts "======== All combination of numbers 1 to 10."
+  one_to_ten = (1..10).to_a
+  all_combinations = one_to_ten.product(one_to_ten)
+  puts all_combinations
+
+  puts "======== All uniq combinations of numbers. For example: [1, 2] is the same as [2, 1]."
+  one_to_ten = (1..10).to_a
+  uniq_combinations =
+    one_to_ten.product(one_to_ten)
+      .map do |unsorted_number|
+    unsorted_number.sort
+  end.uniq
+  puts uniq_combinations
+end
+
+# ====================================================================================
+#  Advanced Arrays
+# ====================================================================================
+# Remove the x from xrepl to run the code. Add the x back to ignore to code.
+xrepl do
+  puts "======== All unique Pythagorean Triples between 1 and 40 sorted by area of the triangle."
+
+  one_to_hundred = (1..40).to_a
+  triples =
+    one_to_hundred.product(one_to_hundred).map do |width, height|
+    [width, height, Math.sqrt(width ** 2 + height ** 2)]
+  end.find_all do |_, _, hypotenuse|
+    hypotenuse.to_i == hypotenuse
+  end.map do |triangle|
+    triangle.map(&:to_i)
+  end.uniq do |triangle|
+    triangle.sort
+  end.map do |width, height, hypotenuse|
+    [width, height, hypotenuse, (width * height) / 2]
+  end.sort_by do |_, _, _, area|
+    area
+  end
+
+  triples.each do |width, height, hypotenuse, area|
+    puts "(#{width}, #{height}, #{hypotenuse}) = #{area}"
+  end
+end