helping stuff

help.rb

# <-- This is a comment
# Array of cards:
arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
# and the player's current hand:
my_hand = []

# In ruby it can also be written like this:
# arr = [1..10]

# Now let's get a random value from the array (deck of cards):
# my_card = arr[rand(arr.size() - 1)]

# Let's break that down so we understand what's happening...
# This will give us the size of the array is one greater than the max index
# arr[9] is the value '10' (because arr[0] is the value '1'), but arr.size()
# returns 10 because there's 10 total values:
arr_size = arr.size() - 1

#arr_size is now '9'
# This gives us a random number from 0 - 9
ran_num = rand(arr_size)

# ran_num is now a random index value, now let's grab that value from our array of 10 cards:
my_card = arr[ran_num]

# Now let's add it to our player's hand of cards:
# the push() method appends a value to the end of an existing array.
my_hand.push(my_card)

# my_hand now looks like this:
# [4]    (assuming our random card was '4')

full_deck = []

["2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13"].each do |number|
  ["c", "s", "d", "h"].each do |card_type|
    # We are looping through each possible number & shape combination for the cards, and
    # adding them to the deck.  It will end up looking like this:
    # ["2c", "2s", "2d", "2h", "3c", "3s", "3d", "3h"..."13d", "13h"]
    full_deck.push!(number + card_type)
  end
end