denisdefreyne

current directory: /Users/denis/.rubies/ruby-3.3.0/lib/ruby/gems/3.3.0/gems/rdiscount-2.2.7.2/ext
/Users/denis/.rubies/ruby-3.3.0/bin/ruby extconf.rb
checking for random()... yes
checking for srandom()... yes
checking for rand()... yes
checking for srand()... yes
checking size of unsigned long... 8
checking size of unsigned int... 4
checking size of unsigned int... 4
checking size of unsigned short... 2

denisdefreyne

require 'io/console'

# Query RGB background color
raw = STDIN.raw do |stdin|
  print "\e]11;?\a"
  stdin.read(25)
end

# Parse
r, g, b = raw.scan(/[0-9a-f]{4}/).map { |part| part.to_i(16) / 65_535.0 }

denisdefreyne

Calling #any? on Set is much slower than calling #empty? and negating it! Take a look at these benchmarks.

Warming up --------------------------------------
               #any?   182.420k i/100ms
         not #empty?     2.432M i/100ms
Calculating -------------------------------------
               #any?      1.834M (± 1.3%) i/s -      9.303M in   5.073017s
         not #empty?     24.254M (± 0.3%) i/s -    121.597M in   5.013433s

denisdefreyne

content/photos/dog.jpg

content/photos/dog.yaml:

alt: A *very* good doggo. Who’s a good girl? woof woof yes you are YOU ARE

Rules:

denisdefreyne

class Score
  include Comparable

  # …
  def <=>(other)
    # …
  end
end

denisdefreyne

class Score
  # …
  def <=>(other)
    return nil unless other.class == self.class

    @value <=> other.value
  end
end

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