kangkyu

class Player
  def play_turn(warrior)
    if warrior.feel.empty?
      if warrior.health < 20
        if warrior.health < @health
          if warrior.look(:backward).any?(&:enemy?)
            warrior.shoot!(:backward)
          else
            if warrior.health < 10 && warrior.feel(:backward).empty?
              warrior.walk!(:backward)

kangkyu

# http://exercism.io/exercises/ruby/clock/readme

class Clock
  def self.at(hours=0, minutes=0)
    new(hours, minutes)
  end

  def initialize(hours=0, minutes=0)
    array = minutes.divmod 60

kangkyu

def fizz_buzz(limit)
  1.upto(limit).reduce("") do |string, n|
    string << (n % 3 == 0 && n % 5 == 0 ? "FizzBuzz" : n % 3 == 0 ? "Fizz" : n % 5 == 0 ? "Buzz" : n.to_s)
    string << "\n"
  end
end

kangkyu

# today's problem: print this page out as plain text. No images, no html tags, no javascript
# write a function that prints that https://www.yahoo.com/ as plain text
# hint: pipe that page through linx

# exec('lynx -dump yahoo.com')

File.open("yahoo_screen.txt", "w") do |f|
  f.write %x[lynx -dump yahoo.com]
end

kangkyu

# write a function called "x" that takes a string, and, if it has an odd number of characters, prints it out diagonally twice -- lower left to upper right, and upper left to lower right -- and those two strings share their middle character

def x(string)
  if string.length.odd?
    array = []
    string.length.times do |row|
      array << []
      string.length.times do |col|
        if col == row || col == (string.length - row - 1)
          array[row][col] = string[col] 

kangkyu

def proper(phrase)
  words = phrase.split(" ")
  words.map {|word| cap_if_selected(word)}.join(" ")
end

def cap_if_selected(word)
  word = word.each_char.map {|char| down_char(char)}.join
  word[0] = up_char(word[0]) if selected(word)
  word
end

kangkyu

# Write a program that processes the string s = "Welcome to the forum.\nHere you can learn Ruby.\nAlong with other members.\n" a line at a time, using all that we have learned so far.

s = "Welcome to the forum.\nHere you can learn Ruby.\nAlong with other members.\n"

s.each_line.with_index 1 do |line, line_num|
  puts "Line #{line_num}: #{line}"
end

kangkyu

# Write a method leap_year?. It should accept a year value from the user, check whether it's a leap year, and then return true or false. Note: a century year, like 1900 and 2000, is a leap year only if it is divisible by 400.

def leap_year?(year)
  year % 400 == 0 || year % 100 != 0 && year % 4 == 0
end

[1998, 1996, 2000, 2100].each do |year|
  minutes = if leap_year?(year)
              366 * 24 * 60
            else

kangkyu

# write a function called find_primes, where you pass in an integer (like 100),
# and your function will calculate all the prime numbers from 1 - 100

# https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes

def find_primes(integer)
  current_ary = (2..integer).to_a
  current_idx = 0

  while current_idx < current_ary.length

kangkyu

def fizz(number)
  number % 3 == 0 ? "fizz" : ""
end

def buzz(number)
  number % 5 == 0 ? "buzz" : ""
end

def fizz_buzz(number)
  (number.to_s + " " + fizz(number) + buzz(number))