denisdefreyne

scores = [
  Score.new(6),
  Score.new(17),
  Score.new(14),
  Score.new(13),
  Score.new(11),
]

p scores.min
p scores.max

denisdefreyne

class Score
  attr_reader :value

  def initialize(value)
    @value = value
  end

  def grade
    if @value < 10
      "failing"

denisdefreyne

case "/home/denis"
when PathPattern.new("/home/*")
  puts "Home sweet home"
else
  puts "Somewhere, I guess"
end

denisdefreyne

bin_ruby = Path.new("bin", "ruby")
var_log = Path.new("var", "log")

pattern = PathPattern.new("/bin/*")

pattern === bin_ruby       # => true
pattern === var_log        # => false

denisdefreyne

pattern = PathPattern.new("/bin/*")

pattern === "/bin/ruby"   # => true
pattern === "/var/log"    # => false

denisdefreyne

class PathPattern
  def initialize(string)
    @string = string
  end

  def ===(other)
    File.fnmatch(@string, other)
  end
end

denisdefreyne

phone = "+491573abcde"
case phone
when /00000/
  puts "Too many zeroes!"
when /[a-z]/
  puts "Your phone number has letters in it?!"
end

denisdefreyne

[4, 2.0, 7, 6.1].grep(Integer)   # => [4, 7]
[4, 2.0, 7, 6.1].grep(2..6)      # => [4, 2.0]

# Same, but more verbose:
[4, 2.0, 7, 6.1].select { |num| Integer === num }
[4, 2.0, 7, 6.1].select { |num| 2..6 === num }

denisdefreyne

Integer === 15              # => true
Integer === 15.5            # => false

denisdefreyne

if 10..15 === 14
  puts "Kinda small!"
elsif 80..99 === 14
  puts "Kinda large!"
end