riywo

coffee> i*i for i in [1..9] when i % 2 == 0
[ 4, 16, 36, 64 ]

# https://github.com/jashkenas/coffee-script/issues/2030
# http://brehaut.net/blog/2011/coffeescript_comprehensions
coffee> [i,j] for j in [1..3] for i in [1..3]
[ [ [ 1, 1 ],
    [ 1, 2 ],
    [ 1, 3 ] ],
  [ [ 2, 1 ],

riywo

aaaa  bbb
ccc ddd

riywo

class String
  def to_bin
    bytes = self.size/2
    self.unpack('a2'*bytes).map{|x| x.hex}.pack('C'*bytes)
  end
end

"20814804c1767293b99f1d9cab3bc3e7".to_bin  #=> " \x81H\x04\xC1vr\x93\xB9\x9F\x1D\x9C\xAB;\xC3\xE7"

riywo

from subprocess import Popen, PIPE

p = Popen(["cat"], stdin=PIPE, stdout=PIPE)
print "stdin.write"
p.stdin.write("aaa")
p.stdin.flush()
print "stdout.read"
print p.stdout.readlines()
p.stdin.close()
p.wait()

riywo

require "anypow"
extend Anypow
run_pow "erb ./conf/nginx.conf.erb > ./conf/nginx.conf && ./sbin/nginx"

riywo

class Array
  def cross(array)
    product(array).map { |e| e.flatten }
  end
end

p [1,2].cross([3,4])
#=> [[1, 3], [1, 4], [2, 3], [2, 4]]
p [1,2].cross([3,4]).cross([5,6])
#=> [[1, 3, 5], [1, 3, 6], [1, 4, 5], [1, 4, 6], [2, 3, 5], [2, 3, 6], [2, 4, 5], [2, 4, 6]]

riywo

2013-07-03  10000
2013-07-02  9000
2013-07-01  4000
2013-06-30  300
2013-06-29  100

riywo

$ ./bin/packer -v
Packer v0.1.0
$ ./bin/packer build test.json
virtualbox output will be in this color.

==> virtualbox: Downloading VirtualBox guest additions. Progress will be shown periodically.
==> virtualbox: Copying or downloading ISO. Progress will be reported periodically.
panic: EOF

goroutine 41 [running]:

riywo

{
  "builders": [{
    "type": "virtualbox",
    "guest_os_type": "Ubuntu_64",
    "iso_url": "http://releases.ubuntu.com/12.04/ubuntu-12.04.2-server-amd64.iso",
    "iso_md5": "af5f788aee1b32c4b2634734309cc9e9",
    "ssh_username": "packer",
    "ssh_wait_timeout": "60s",
    "boot_wait": "30s",
    "boot_command": [

riywo

MAKE_OPTS="-j 4" RUBY_CONFIGURE_OPTS="--enable-load-relative --with-readline-dir=`brew --prefix readline`" rbenv install -k -v 2.0.0-p247