gsamokovarov

unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'rails', github: 'gsamokovarov/rails', branch: 'fix-null-resolver'
    gem 'arel', github: 'rails/arel'
    gem 'rack', github: 'rack/rack'
    gem 'i18n', github: 'svenfuchs/i18n'
  GEMFILE

  system 'bundle'

gsamokovarov

die_ruby.rb:10: [BUG] Segmentation fault at 0x007fff9cd5cfe8
ruby 2.1.1p76 (2014-02-24 revision 45161) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0002 p:0015 s:23794 E:001928 EVAL   die_ruby.rb:10 [FINISH]
c:0001 p:0000 s:0002 E:0016d8 TOP    [FINISH]

die_ruby.rb:10:in `<main>'

-- C level backtrace information -------------------------------------------

gsamokovarov

class Exception
  def set_backtrace_with_extension
    set_backtrace_without_extension(*args)
  end

  alias set_backtrace_without_extension set_backtrace
  alias set_backtrace set_backtrace_with_extension
end

raise

gsamokovarov

require 'pty'

PTY.spawn 'irb' do |output, input, pid|
  loop do sleep 1
    input.puts 'puts :Wootz!'
    puts output.gets
  end
end

__END__

gsamokovarov

# If you truncate a StrinIO and don't rewind it, the next write will have
# leading zeroes.

require 'stringio'

s = StringIO.new
s.write 'foo'
p s.string    # => "foo"
s.truncate 0
# s.rewind

gsamokovarov

require 'irb/xmp'

xmp = XMP.new(binding)
xmp.puts "foo = 42"
xmp.puts "foo"

gsamokovarov

def power_linear(number, exponent):
    return sum([number * number for _ in range(exponent)])

def power_log(number, exponent):
    if exponent == 0:
        return 1

    half = power_log(number, exponent / 2)
    return half * half if exponent % 2 == 0 else number * half * half

gsamokovarov

def permute(sequence, index=0):
    length = len(sequence)

    if index > length:
        raise StopIteration

    if index == length:
        yield sequence
    else:
        for i in range(index, length):

gsamokovarov

_.mixin({
  // Invalid date predicate. The invalid dates are still `Date` instances, however their time is `NaN`.
  isInvalidDate: function(obj) {
    return _.isDate(obj) && _.isNaN(obj.getTime());
  }
});

gsamokovarov

require 'carmine'

# Opinionated client.
carmine = Carmine.new(
  # Default to JavaScript lexing, if that's what the examples
  # would be written in.
  :lexer     => :javascript,
  # An image, so we can embed it into presentations.
  :formatter => :png,
  :options   => {