nathankleyn

diff --git a/.gitignore b/.gitignore
index 2dfdf96..79d884c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,5 @@ railties/test/initializer/root/log
 railties/doc
 railties/guides/output
 railties/tmp
+.DS_Store
+nbproject

nathankleyn

gd.init().then(function() {
  var shares = 0;
  
  gd.event('/gd/shared').subscribe(function() {
    shares += 1;
    // Do whatever else you would like here...
  });
});

nathankleyn

def fact(n)
  return 1 if (0..1).include?(n)
  n * fact(n - 1)
end

nathankleyn

fact(6) = 6 * fact(5)
        = 6 * 5 * fact(4)
        = 6 * 5 * 4 * fact(3)
        = 6 * 5 * 4 * 3 * fact(2)
        = 6 * 5 * 4 * 3 * 2 * fact(1)
        = 6 * 5 * 4 * 3 * 2 * 1
        = 720

nathankleyn

def fact(n)
  factorial = 1

  begin
    factorial *= n--
  end while n > 1

  factorial
end

nathankleyn

puts = [1, 2, 3].each.class # => Enumerator

nathankleyn

x = [1, 2, 3]

enum = x.each
puts enum.class # => Enumerator
puts enum.next # => 1
puts enum.next # => 2
puts enum.next # => 3
puts enum.next # => StopIteration exception

nathankleyn

def fact(n)
  (1..n).inject(:*) || 1
end

nathankleyn

Prime.lazy.select { |x| x.to_s.include?('3') }.take(20).to_a
Prime.lazy.select { |x| 100.to_s.chars.map(&:to_i).inject(:+) }.take(20).to_a

nathankleyn

a = []
Prime.each do |x|
  next unless x.to_s.include?('3')
  a << x
  break if a.size == 20
end