hannestyden

# http://rubular.com/r/UMTb5KhY8A

DATE=/\d{4}-\d{2}-\d{2}/
ZONE=/Z|[-+]\d{2}(?::\d{2})?/
TIME=/\d{2}(?::\d{2}(?::\d{2}(?:\.\d+)?)?)?/
TIME_WITH_ZONE=/#{TIME}(?:#{ZONE})?/

ISO8601_FORMAT=/^(#{DATE})(?:T(#{TIME_WITH_ZONE}))?$/

ISO8601_FORMAT.match('2008-08-30T01:45:36.100Z') # => #<MatchData "2008-08-30T01:45:36.100Z" 1:"2008-08-30" 2:"01:45:36.100Z">

hannestyden

def scream(s)
  s.upcase
end

s = scream(<<-TEXT.gsub('z', 's')).gsub('EE', 'I')
Theez eez a lot of text.

Not really, but eet could be.
TEXT

hannestyden

$('tr.file-diff-line.gd').hide();

hannestyden

git branch --merged | grep -v "\*" | while read b; do git br -d $b; done

git branch | grep -v "\*" | while read b; do echo "Delete '$b'?"; read y < /dev/tty; [[ "$y" == "y" ]] && git br -D $b; done

hannestyden

class Human
  def greet
    "I am a #{species}"
  end

  def species
    'human'
  end
end
Human.new.greet # => "I am a human"

hannestyden

module Utils; def r; yield rescue $!; end; end; include Utils

def i
  :i
end

def I
  :I
end

hannestyden

class A # < Struct
  def self.new(mod, *arguments, &block)
    if arguments.length > 0
      # Why is the block required in order to access the members from a block?
      # ... because the block is passed to the `super`
      Struct.new(*arguments) # { }
    else
      Class.new
    end.tap { |c|
      c.send(:include, mod)

hannestyden

class A < Struct
  def self.new(mod, *arguments, &block)
    if arguments.length > 0
      super(*arguments) do
        include mod
        define_method :greet, &block
      end
    else
      Class.new do
        include mod

hannestyden

def tapp(o, &block)
  o.tap { |m| p block.call(o) }
end

tapp("haha", &:size)
# => "haha"
# >> 4

hannestyden

touch /tmp/sandwich
sudo chown root:wheel /tmp/sandwich
echo "make me a sandwich" >> /tmp/sandwich
sudo sh -c 'echo "make me a sandwich" >> /tmp/sandwich'
cat /tmp/sandwich