Gecko [ beacons-mine.com ]

Name	Size	Permission	Date
cgi	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
date	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
digest	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
dl	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
drb	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
fiddle	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
io	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
irb	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
json	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
matrix	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
net	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
openssl	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
optparse	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
psych	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
racc	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rake	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rbconfig	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rdoc	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rexml	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rinda	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
ripper	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rss	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
rubygems	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
shell	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
syslog	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
test	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
uri	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
webrick	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
x86_64-linux	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
xmlrpc	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
yaml	[ DIR ]	drwxr-xr-x	2026-02-18 15:11
English.rb	6.44 KB	-rw-r--r--	2013-02-04 08:20
abbrev.rb	3.31 KB	-rw-r--r--	2013-02-21 23:05
base64.rb	2.63 KB	-rw-r--r--	2013-05-19 08:40
benchmark.rb	17.95 KB	-rw-r--r--	2013-09-20 21:35
cgi.rb	9.84 KB	-rw-r--r--	2013-07-18 19:20
cmath.rb	8.93 KB	-rw-r--r--	2015-07-03 14:42
complex.rb	380 B	-rw-r--r--	2009-08-16 21:04
csv.rb	81.68 KB	-rw-r--r--	2014-09-14 20:55
date.rb	946 B	-rw-r--r--	2023-07-26 19:52
debug.rb	29.08 KB	-rw-r--r--	2013-12-14 20:18
delegate.rb	11.13 KB	-rw-r--r--	2014-02-02 19:16
digest.rb	2.34 KB	-rw-r--r--	2023-07-26 19:52
dl.rb	280 B	-rw-r--r--	2023-07-26 19:52
drb.rb	19 B	-rw-r--r--	2009-10-02 16:15
e2mmap.rb	3.89 KB	-rw-r--r--	2013-12-17 16:50
erb.rb	26.07 KB	-rw-r--r--	2014-08-11 20:25
expect.rb	2.14 KB	-rw-r--r--	2023-07-26 19:52
fiddle.rb	1.65 KB	-rw-r--r--	2023-07-26 19:52
fileutils.rb	47.17 KB	-rw-r--r--	2015-04-28 10:46
find.rb	2.36 KB	-rw-r--r--	2014-10-15 21:01
forwardable.rb	7.86 KB	-rw-r--r--	2013-05-24 03:16
getoptlong.rb	15.38 KB	-rw-r--r--	2013-05-19 20:20
gserver.rb	8.86 KB	-rw-r--r--	2014-07-06 19:27
ipaddr.rb	17.05 KB	-rw-r--r--	2015-10-29 20:06
irb.rb	20.03 KB	-rw-r--r--	2016-03-25 13:52
json.rb	1.74 KB	-rw-r--r--	2023-07-26 19:52
kconv.rb	5.74 KB	-rw-r--r--	2023-07-26 19:52
logger.rb	22.37 KB	-rw-r--r--	2016-02-25 16:34
mathn.rb	6.52 KB	-rw-r--r--	2011-08-27 03:52
matrix.rb	45.43 KB	-rw-r--r--	2014-07-11 19:38
mkmf.rb	80.5 KB	-rw-r--r--	2023-07-26 19:49
monitor.rb	6.93 KB	-rw-r--r--	2012-11-16 22:25
mutex_m.rb	2 KB	-rw-r--r--	2013-02-20 08:21
observer.rb	5.81 KB	-rw-r--r--	2013-11-21 10:14
open-uri.rb	24.27 KB	-rw-r--r--	2014-02-22 14:24
open3.rb	20.37 KB	-rw-r--r--	2013-12-01 08:43
openssl.rb	528 B	-rw-r--r--	2023-07-26 19:52
optparse.rb	50.8 KB	-rw-r--r--	2013-11-28 13:04
ostruct.rb	7.7 KB	-rw-r--r--	2013-10-23 20:44
pathname.rb	15.3 KB	-rw-r--r--	2023-07-26 19:52
pp.rb	14.1 KB	-rw-r--r--	2013-10-22 14:59
prettyprint.rb	16.33 KB	-rw-r--r--	2013-05-19 08:40
prime.rb	13.2 KB	-rw-r--r--	2013-07-15 09:51
profile.rb	205 B	-rw-r--r--	2009-10-02 16:15
profiler.rb	4.51 KB	-rw-r--r--	2013-05-20 04:34
pstore.rb	14.85 KB	-rw-r--r--	2012-11-11 09:53
psych.rb	14.88 KB	-rw-r--r--	2023-07-26 19:52
rake.rb	2.12 KB	-rw-r--r--	2013-10-12 03:05
rational.rb	308 B	-rw-r--r--	2009-09-24 06:12
rdoc.rb	4.92 KB	-rw-r--r--	2013-12-22 15:55
resolv-replace.rb	1.73 KB	-rw-r--r--	2013-03-11 19:17
resolv.rb	72.31 KB	-rw-r--r--	2015-05-13 11:03
ripper.rb	2.53 KB	-rw-r--r--	2023-07-26 19:52
rss.rb	2.84 KB	-rw-r--r--	2011-05-11 15:52
rubygems.rb	30.97 KB	-rw-r--r--	2023-07-26 19:49
scanf.rb	23.54 KB	-rw-r--r--	2013-12-14 08:25
securerandom.rb	8.49 KB	-rw-r--r--	2013-11-07 23:34
set.rb	18.7 KB	-rw-r--r--	2013-11-23 05:20
shell.rb	10.3 KB	-rw-r--r--	2013-05-19 08:40
shellwords.rb	5.94 KB	-rw-r--r--	2013-12-14 23:56
singleton.rb	4.02 KB	-rw-r--r--	2011-05-18 19:39
socket.rb	25.6 KB	-rw-r--r--	2023-07-26 19:52
sync.rb	7.25 KB	-rw-r--r--	2013-05-19 08:40
tempfile.rb	11.4 KB	-rw-r--r--	2013-11-21 14:58
thwait.rb	3.38 KB	-rw-r--r--	2013-11-07 22:32
time.rb	21.32 KB	-rw-r--r--	2015-08-17 13:11
timeout.rb	3.7 KB	-rw-r--r--	2015-08-17 13:25
tmpdir.rb	4.15 KB	-rw-r--r--	2013-05-19 08:40
tracer.rb	6.4 KB	-rw-r--r--	2013-07-18 19:20
tsort.rb	14.14 KB	-rw-r--r--	2013-10-17 21:29
ubygems.rb	268 B	-rw-r--r--	2009-10-02 16:15
un.rb	8.87 KB	-rw-r--r--	2013-07-05 19:13
uri.rb	3.07 KB	-rw-r--r--	2011-05-14 01:33
weakref.rb	3.23 KB	-rw-r--r--	2013-11-10 04:12
webrick.rb	6.69 KB	-rw-r--r--	2013-10-06 05:09
xmlrpc.rb	8.49 KB	-rw-r--r--	2013-12-12 08:39
yaml.rb	2.31 KB	-rw-r--r--	2013-08-12 09:19

Rename

#
# Implementation of the _Observer_ object-oriented design pattern.  The
# following documentation is copied, with modifications, from "Programming
# Ruby", by Hunt and Thomas; http://www.ruby-doc.org/docs/ProgrammingRuby/html/lib_patterns.html.
#
# See Observable for more info.

# The Observer pattern (also known as publish/subscribe) provides a simple
# mechanism for one object to inform a set of interested third-party objects
# when its state changes.
#
# == Mechanism
#
# The notifying class mixes in the +Observable+
# module, which provides the methods for managing the associated observer
# objects.
#
# The observable object must:
# * assert that it has +#changed+
# * call +#notify_observers+
#
# An observer subscribes to updates using Observable#add_observer, which also
# specifies the method called via #notify_observers. The default method for
# #notify_observers is #update.
#
# === Example
#
# The following example demonstrates this nicely.  A +Ticker+, when run,
# continually receives the stock +Price+ for its <tt>@symbol</tt>.  A +Warner+
# is a general observer of the price, and two warners are demonstrated, a
# +WarnLow+ and a +WarnHigh+, which print a warning if the price is below or
# above their set limits, respectively.
#
# The +update+ callback allows the warners to run without being explicitly
# called.  The system is set up with the +Ticker+ and several observers, and the
# observers do their duty without the top-level code having to interfere.
#
# Note that the contract between publisher and subscriber (observable and
# observer) is not declared or enforced.  The +Ticker+ publishes a time and a
# price, and the warners receive that.  But if you don't ensure that your
# contracts are correct, nothing else can warn you.
#
#   require "observer"
#
#   class Ticker          ### Periodically fetch a stock price.
#     include Observable
#
#     def initialize(symbol)
#       @symbol = symbol
#     end
#
#     def run
#       last_price = nil
#       loop do
#         price = Price.fetch(@symbol)
#         print "Current price: #{price}\n"
#         if price != last_price
#           changed                 # notify observers
#           last_price = price
#           notify_observers(Time.now, price)
#         end
#         sleep 1
#       end
#     end
#   end
#
#   class Price           ### A mock class to fetch a stock price (60 - 140).
#     def self.fetch(symbol)
#       60 + rand(80)
#     end
#   end
#
#   class Warner          ### An abstract observer of Ticker objects.
#     def initialize(ticker, limit)
#       @limit = limit
#       ticker.add_observer(self)
#     end
#   end
#
#   class WarnLow < Warner
#     def update(time, price)       # callback for observer
#       if price < @limit
#         print "--- #{time.to_s}: Price below #@limit: #{price}\n"
#       end
#     end
#   end
#
#   class WarnHigh < Warner
#     def update(time, price)       # callback for observer
#       if price > @limit
#         print "+++ #{time.to_s}: Price above #@limit: #{price}\n"
#       end
#     end
#   end
#
#   ticker = Ticker.new("MSFT")
#   WarnLow.new(ticker, 80)
#   WarnHigh.new(ticker, 120)
#   ticker.run
#
# Produces:
#
#   Current price: 83
#   Current price: 75
#   --- Sun Jun 09 00:10:25 CDT 2002: Price below 80: 75
#   Current price: 90
#   Current price: 134
#   +++ Sun Jun 09 00:10:25 CDT 2002: Price above 120: 134
#   Current price: 134
#   Current price: 112
#   Current price: 79
#   --- Sun Jun 09 00:10:25 CDT 2002: Price below 80: 79
module Observable

#
  # Add +observer+ as an observer on this object. so that it will receive
  # notifications.
  #
  # +observer+:: the object that will be notified of changes.
  # +func+:: Symbol naming the method that will be called when this Observable
  #          has changes.
  #
  #          This method must return true for +observer.respond_to?+ and will
  #          receive <tt>*arg</tt> when #notify_observers is called, where
  #          <tt>*arg</tt> is the value passed to #notify_observers by this
  #          Observable
  def add_observer(observer, func=:update)
    @observer_peers = {} unless defined? @observer_peers
    unless observer.respond_to? func
      raise NoMethodError, "observer does not respond to `#{func.to_s}'"
    end
    @observer_peers[observer] = func
  end

#
  # Remove +observer+ as an observer on this object so that it will no longer
  # receive notifications.
  #
  # +observer+:: An observer of this Observable
  def delete_observer(observer)
    @observer_peers.delete observer if defined? @observer_peers
  end

#
  # Remove all observers associated with this object.
  #
  def delete_observers
    @observer_peers.clear if defined? @observer_peers
  end

#
  # Return the number of observers associated with this object.
  #
  def count_observers
    if defined? @observer_peers
      @observer_peers.size
    else
      0
    end
  end

#
  # Set the changed state of this object.  Notifications will be sent only if
  # the changed +state+ is +true+.
  #
  # +state+:: Boolean indicating the changed state of this Observable.
  #
  def changed(state=true)
    @observer_state = state
  end

#
  # Returns true if this object's state has been changed since the last
  # #notify_observers call.
  #
  def changed?
    if defined? @observer_state and @observer_state
      true
    else
      false
    end
  end

#
  # Notify observers of a change in state *if* this object's changed state is
  # +true+.
  #
  # This will invoke the method named in #add_observer, passing <tt>*arg</tt>.
  # The changed state is then set to +false+.
  #
  # <tt>*arg</tt>:: Any arguments to pass to the observers.
  def notify_observers(*arg)
    if defined? @observer_state and @observer_state
      if defined? @observer_peers
        @observer_peers.each do |k, v|
          k.send v, *arg
        end
      end
      @observer_state = false
    end
  end

end