BATMAN AND ROBIN A film review by Terri Buchman Copyright 1997 Terri Buchman
BATMAN AND ROBIN: ahm, well, that was something. I'm not quite sure what, but that was something. I'm not sorry that I went, but I'm not sure I'd go again. It had terrible, horrible, teeth-grindingly bad dialogue that made me want to slap not only the credited screenwriter, Akiva Goldsman, but every Elementary school teacher who ever told him he could write. (What could they have been thinking?) On the other hand, there were some solidly gorgeous visuals in the flick, the costuming was a hoot and Uma Thurman ain't half bad as Poison Ivy. So, I'd say flip a coin. Heads, the visuals win and you get to spend two+ hours in air conditioning. Tails, the dopey plot is just too difficult to take.
This is one loud damn picture. (Which is actually sort of a mixed blessing, since some of the idiotic dialogue is acutally drowned out. Just thank the Divine for small miracles and pass the popcorn.) I'm not exactly sure of the specific plot sequence, but it doesn't really matter. Batman and Robin get another couple of psychotic bad guys to fight, one armor-clad uber-male and one barely clad uber-female. The Caped Crusader has also been very busy in the old Bat-metalshop and has come up with a host of new bat toys that I almost actually saw. (It was a somewhat dimly lit picture. Why Warner Bros would spend mega-bucks developing all these cool toys and then forget to light the set so that the audiience can acutally see them is beyond me, but there it is.)
Let's see, what else do I remember.? (It was that kind of a picture.  Well, Chris O'Donnell was in it. This was actually a highlight of the movie for me, since my 12 year old daughter has a huge crush on Mr. O'Donnell and sighed heavily every time he came on screen. (You haven't lived until you've been to an action picture with a love-sick preteen. I knew parenthood would be tough, but I never thought I would have to warn my daughter about getting involved with guys who have obvious rubber fetishes. On the other hand, it made the picture more interesting.)
I really, really like George Clooney. He has a nice screen presence. Unfortunately (And it kills me to say this, because I really like Mr. Clooney) his Batman is not really very good. (No wonder my daughter has a crush on Mr. O'Donnell instead of Mr. Clooney. Mr. O'Donnell has a pulse and his Robin is a bit of a rebel.   No I will not loan you money. You have lousy taste in women. Would you stop whining all the time and act your age." Geez, if I were Robin I'd leave Wayne Manor and set up shop somewhere else. Batman is getting a little stodgy and difficult to be around.
Alicia Silverstone plays Batgirl. Yawn.
Okay, everybody loves the Bat-Villains. (Well, sorta. I loved Catwoman in the second Bat movie, but I hated the Penguin. I loved Nicholson's Joker and Carrey's Riddler. I tolerated Tommy Lee Jones' Two-Face. That's not a bad villain track-record.) Ahnold is ahm, well Ahnold.  (See .sig below. I've seen a lot of dumb dialogue and I am, generally speaking, a forgiving woman, but even I have a limit.) It's as though someone took all the dalogue from past Ahnold movies and put them in a Cuisinart and then gave him the finished product. The character's costume is fun (RoboCop Lite) and Ahnold certainly seems to be having fun with the part. But the character doesn't really take off and start doing this joyful dance of psychotic rebellion that the best Bat-Villains do. The character is weighted down by an indecisive plot that can't decide whether Mr. Freez is a deluded and sad character or a silly upbeat homicidal freak. I still can't figure it out. (Geez, they stole the characterization from one of the best episodes of 'Batman: The Animated Series.' The least they could have done was run with it. Victor Freez, sad and pathetic character who was, in a way, a victim of love.)
Uma Thurman is wonderful as Poison Ivy. Batman has a long tradition of infatuation with the wrong woman and Ivy is a truly messed-up Bat-Babe. Thurman is lively and beautiful and graceful and underclad as the luscious and vengeful Poison Ivy. She is the highlight of the movie. (Well, I also have a soft spot for Michael Gough who has been Alfred the Butler through all 4 installments of this series. He has surely endured a lot.) Ms. Thurman's performance isn't as rich as Michele Pfeiffer's was in BATMAN RETURNS, but she is a strong and funny character and is almost worth the price of admission.
Gotham City is wonderfully, breathtakingly brought to life. (Damn. Writing this makes me think of that line of dialogue from BULL DURHAM. To paraphrase: This picture has a multi-million dollar art design, but a ten cent brain. Too bad.) Particular highlights include shots of all those wacky giant sculptures and a gorgeous and fully imagined shot of Arkham Asylum. (Could someone please tell MR. Schumacher that in the next picture we would like to see some of the stunning visuals put to good use. Hey, maybe we could break a few wackos out of Arkham, let them use their brains and give Bats a real challenge. That might be fun.)
Anyway, I can neither recommend nor discourage anyone from going to see BATMAN & ROBIN. It depends on how you like your action flicks. If you like bright, loud, splashy popcorn movies and don't mind bad dialgoue and extremely fuzzy plotting, then go, have fun. (Hey, if you happen to like lots of shots of black-rubber clad toushies, then this is the picture for you.) If you want movies to make sense and you want a picture that slows down for five minutes so that you can actually find out what the heck is going on, then pick something else.
terrib
I really liked some of it. Honest-to-gawd. But then again, I really, really hated parts of it. Go figure.
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Product Development and Design
To identify the key product requirements, we outlined the degrees of value associated with various criteria across both of our primary stakeholders.
To effectively address situational anxiety in dogs, we identified three important areas that our product must inhabit to be adaptive. No products in the anxiety reduction space currently address all three areas.
Using the 3-6-5 brainstorming method, my team and I created a variety of concepts to address our opportunity. We then used affinity diagramming to organize our ideas into coherent concept designs.
This method allowed us to compare our product concepts to our most direct competitors (which was actually a combination of existing products). We scored our 9 concepts and 2 competitors against a datum across criteria for the parent, dog, and our company stakeholder.
After consolidating information from both user research and the Pugh Analysis, the cuddle toy and smart bed were revealed to be the most promising concepts.
A functional prototype for the cuddle toy concept was developed and testing, revealing that dogs view the form more as a play toy than a mechanism for rest. This led us to shift our focus to the smart bed concept. To test the mechanism that would go inside of the smart bed, we constructed a cloth-covered frame, housing a wireless speaker. Pheromone was sprayed on the inside of the frame. Testing suggested the concept was viable.
To further explore how the bed would incorporate the functionalities of a pheromone dispenser and heartbeat/music player, I designed the general specifications for the product.
I developed a heirarchy of information based on research insights to design a mobile application that both conveys monitor data to the parent, as well as provides remote control over the anxiety reducer at home
I progressed the interface through three different iterations alongside usability testing in the form of cognitive walkthroughs and informal interviews.
The ABS housing, located in the rim of the bed, contains a mechanism to spray pheromone into a filter pad, where a fan intakes the pheromone safely through the mesh cover, towards the interior of the bed. The box also contains a speaker to display the hearbeat and music.
The device on the collar contains a tri-axis accelerometer (to measure activity level), a pulsometer (to measure heart rate), microphone (to measure vocalization), and RFID tag (to measure proximity to the bed).
Ultimately, we envision pet stores to have entire sections of their stores devoted to the Wagd product line, where customers can pick and choose which products best suit their anxious dogs.


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@* * Copyright 2019 HM Revenue & Customs * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *@ @import java.time.ZoneId @import java.time.format.DateTimeFormatter @import config.AppConfig @import models.declaration.notifications.Notification @import models.declaration.submissions.{Submission, SubmissionRequest, SubmissionStatus, UnknownStatus} @this(main_template: views.html.main_template) @(appConfig: AppConfig, submissions: Seq[(Submission, Seq[Notification])])(implicit request: Request[_], messages: Messages) @main_template( title = messages("submissions.title"), appConfig = appConfig) { @components.back_link(routes.ChoiceController.displayPage().url)
| @messages("submissions.ducr") | @messages("submissions.lrn") | @messages("submissions.mrn") | @messages("submissions.submittedTimestamp") | @messages("submissions.status") | @messages("submissions.noOfNotifications") |
|---|---|---|---|---|---|
| @submission.ducr | @submission.lrn | @submission.mrn | @{submission.actions.find(_.requestType == SubmissionRequest).map(_.requestTimestamp).map(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm").withZone(ZoneId.systemDefault()).format(_))} | @{notifications.headOption.map(n => SubmissionStatus.retrieve(n.functionCode, n.nameCode)).getOrElse(UnknownStatus)} | @if(submission.mrn.isDefined) { @{notifications.length} } else { @{notifications.length} } |


JASON'S LYRIC Drive-By Filmmaking A film review by N'Gai Croal Copyright 1994 N'Gai Croal/Terrordome Bookworks
George McHenry isn't depraved enough to show a son giving his father uncut heroin to shoot up, but that's about all that separates his directorial debut JASON'S LYRIC from being as twisted as this year's earlier entry in the inner city black pathology sweepstakes, SUGAR HILL.
 But unlike their white counterparts, most brothas don't have the courage of their convictions (Carl Franklin's ONE FALSE MOVE is a rare exception). As if sex and violence weren't enough, they feel the need to further commercialize their films by setting them in the 'hood.
The final result is often a hodge-podge that starts nowhere and spins its wheels in place for two hours, while delivering a set of stereotypes--absent/dead fathers, crack hoes, gun-toting gangstas and drug dealers--that could serve as a Klan recruitment tape.  Unfettered by ghetto "reality" and too independent to know what the word "sellout" means, their hard-boiled visions soar while ours remain embarrassingly earthbound.
Like SUGAR HILL, JASON'S LYRIC is another lazy retelling of the Cain and Abel myth. Jason (Allen Payne) is the intelligent, upright older brother who works at a television repair shop, never sasses his moms and wakes up every night dripping in sweat, induced by nightmares about his father's murder. Joshua (Bokeem Woodbine) is that crazy muthafucka from around the way--a gangsta that couldn't hold a job if his life depended on it, sets his mother's nerves on edge and wards off nightmares with a cold forty or a bottle of gin, no juice.
Both live in Houston's Fifth Ward, which, as a result of McHenry's efforts, might just have a twelve-gauge shot at replacing South-Central L.A. as the mythical killing field of urban lore. As the genre demands, Jason is determined to be his brother's keeper. But then he meets a fine sista (is there any other kind in these movies?) named Lyric (get it? Jason's Lyric) and starts dreaming of a world outside of the ghetto (surprise, surprise). At the same time, recent parolee Joshua finds himself being pulled further in the local ghetto games by Lyric's half-brother Alonzo (Treach of Naughty by Nature fame). Before we can say "Shakespearean tragedy," a bank job is botched and the walls of Lyric's house are being painted the color of Elsinore: blood-red.
You might think that producing NEW JACK CITY, which McHenry did, would have gotten the need to make a 'hood film out of his system. But a man that would make two "House Party" sequels and once planned a sequel to NEW JACK CITY is not a man to be noted for his originality. JASON'S LYRIC lives up to that limited vision, encasing its actors in all too-familiar roles.
Forrest Whitaker, whose work in films as good as THE CRYING GAME and as bad as BLOWN AWAY has generally been inventive phones in a performance so shockingly bad that we want to avert our eyes. The good-father-that-goes-away-to-Vietnam-and-comes-back-in-shambles is old hat by now, a lazy form of shorthand designed to evoke pity. A better director might have encouraged Whitaker to play Maddog against type, to suggest an willfully unchecked self-loathing akin to Laurence Fishburne's coke-addled Ike Turner in WHAT'S LOVE GOT TO DO WITH IT?" Instead, McHenry pushes him into an undisciplined, boozy incoherence that overshoots sentimentality and lands squarely on embarrassment.
The film's leads don't fare much better. Allen Payne has been likened by some to a younger Denzel Washington, but that would suggest that he can act, which no one should accuse him of. His tough-loving big brother act is only marginally more convincing than similar performances by Cuba Gooding Jr. or Morris Chesnut, but it's just as boring. The scenes where he tries to woo Lyric have a sweet corniness to them, which suggests that a respectable love story could have been told had McHenry not been so preoccupied with Houston's mean streets.
Bokeem Woodbine is no better--he doesn't have the you-don't-like-how-I'm-livin'-well-fuck-you swagger of Ice Cube's Doughboy from BOYZ N THE HOOD or the craziest-nigga-alive bravado of Larenz Tate's O-Dog of MENACE II SOCIETY fame. Fortunately, he doesn't need it. Joshua is a gangsta with a heart of cotton candy; he doesn't have the heart for a life of crime, but it's the only way he knows how express his anger. The film awkwardly drives this home in its only honestly powerful scene: when Joshua's mother throws away the surprise dinner he cooked for her because it was bought with his drug money, he runs out of the house and commits a violent car-jacking. A scene like this, coupled with Woodbine's rarely seen, beautiful smile suggests depths that the screenplay doesn't have--it concludes that Joshua is bad because he's just like his father.
Ironically, the best of the three leads, Jada Pinkett, fares the worst, because she's a prep-school brotha's wet-dream and an intelligent knockout who spreads her legs on date number three--and nothing more. After a couple sex scenes that look like outtakes from a bad Spike Lee film, Lyric has nothing to do but cling to her man, try to get him out of the 'hood and take a bullet at point-blank range. It's this insistence on simplistic pathology on the part of numerous black filmmakers that makes so many black people call for a moratorium on "negative images" when what's called for is complexity. And if black actors are in bad shape when looking for complex characters to play, black actresses are in critical condition. But McHenry don't love them hoes anymore than he loves us in the audience. Otherwise he would have made a different film.
-- n'gai croal<EMAIL_ADDRESS>.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
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review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
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The formatting of the review is likely to differ from the original due
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Related links: index of all rec.arts.movies.reviews reviews


Configuration files and how they work
All configurations, both client and server work the same. This article documents their commonalities.
Features are:
- XML-based
- Multiple named configurations supported in a given file
- Multiple types of storage may be specified
- Aliases for configurations are allowed.
- Other configuration files may be included (as of OA4MP 1.1)
Comment: ALL tag names are case sensitive in the configuration file -- as per the XML spec,
so "fileStore" works, but "filestore" would not, for instance.
Parameters or, how the system finds its files
There are two things that determine which configuration to use, the file in which it resides and the name
of the configuration in that file. These will henceforth be referred to as the file parameter
and name parameter. To specify parameters you have two options:
- Specify them as context parameters in the web.xml file for Tomcat.
- Specify them as command line arguments to the JVM (prepend "-D"). This is much less common.
Tip: It is a very good idea to put your context parameters in the server web.xml (should be
located at $CATALINA_HOME/conf/web.xml.) This will allow you to swap out/upgrade versions of
OA4MP without having to touch any configuration -- just drop a new version of the war into the right
place and restart the server to get an upgrade.
Clients and servers as well as different versions of
OA4MP have different parameters. The specific of those will be documented elsewhere. However, here
is the definitive list for reference
| Component |
Parameter |
Value |
| client |
file |
oa4mp:oauth2.client.config.file |
| name |
oa4mp:oauth2.client.config.name |
| server |
file |
oa4mp:oauth2.server.config.file |
| name |
oa4mp:oauth2.server.config.name |
A server example.
This how the the file and name parameters would be specified in the web.xml file:
<context-param>
<param-name>oa4mp:oauth2.server.config.file</param-name>
<param-value>/path/to/cfg.xml</param-value>
</context-param>
<context-param>
<param-name>oa4mp:oauth2.server.config.name</param-name>
<param-value>default</param-value>
</context-param>
in this case the server configuration file at /path/to/cfg.xml would be loaded, searched and the configuration
named "default" would be loaded. For a given version and component, use the appropriate parameter from the table above.
Aliases
An alias is a reference to another named configuration. They are completely analogous to
file links in unix. Only resolves an alias if it is specifically used. It will also throw an exception
if a cycle is detected. By that we mean a chain of aliases that resolves to itself. So if
A refers to B as an alias, and B refers to A, then an exception will occur and
no configuration will be loaded.
A client example using aliases
in this example, the name parameter is "default". Inside the configuration file though, there are a couple of
configurations possible. For instance a production instance and one for debugging. All you would need to switch your
entire installation is to change what the alias points to here (rather than messing around in Tomcat) and restarting the
server.
<config>
<client name="default" alias="postgres-cfg"/>
<client name="postgres-cfg">
<!-- lots of stuff -->
</client>
<client name="debug-cfg">
<!-- lots of other stuff -->
</client>
</config>
Included files.
Configuration files may now be included in other configuration files. Note that
- the other files must be completely correct syntactically. So no snippets.
- there is no limit on the number of files that may be included and referenced files can reference other files.
- all files are ingested first into what is essentially one large configuration internally. Hierarchies of
configurations
will not be understood. What distinguishes configurations is their name. If two configurations with the same
name are encountered, the result will be unpredictable.
- aliases are resolved after loading. This allows you to keep you aliases in any included file and they will be
resolved.
- referenced files are loaded exactly once. So if file A refers to file B which refers to A, Both A and B will
load but no recursion will take place. An informational message will be written to the logs if this happens.
This is not considered a fatal condition.
A client example of using files.
Reworking the above alias example, this is completely equivalent to
<config>
<file include="/path/to/file.xml"/>
<client name="default" alias="postgres-cfg"/>
</config>
and the next file, which is /path/to/file.xml in toto is
<config>
<client name="postgres-cfg">
<!-- lots of stuff -->
</client>
<client name="debug-cfg">
<!-- lots of other stuff -->
</client>
</config>
Refer to the first file in your deployment. The second will be loaded for you automatically.


class Gem::Security::Policy
A Gem::Security::Policy object encapsulates the settings for verifying signed gem files. This is the base class. You can either declare an instance of this or use one of the preset security policies in Gem::Security::Policies.
Attributes
Public Class Methods
Create a new Gem::Security::Policy object with the given mode and options.
# File lib/rubygems/security/policy.rb, line 26 def initialize name, policy = {}, opt = {} require 'openssl' @name = name @opt = opt # Default to security @only_signed = true @only_trusted = true @verify_chain = true @verify_data = true @verify_root = true @verify_signer = true policy.each_pair do |key, val| case key when :verify_data then @verify_data = val when :verify_signer then @verify_signer = val when :verify_chain then @verify_chain = val when :verify_root then @verify_root = val when :only_trusted then @only_trusted = val when :only_signed then @only_signed = val end end end
Public Instance Methods
Ensures that signer
is valid for time
and was
signed by the issuer
. If the issuer
is
nil
no verification is performed.
# File lib/rubygems/security/policy.rb, line 87 def check_cert signer, issuer, time raise Gem::Security::Exception, 'missing signing certificate' unless signer message = "certificate #{signer.subject}" if not_before = signer.not_before and not_before > time then raise Gem::Security::Exception, "#{message} not valid before #{not_before}" end if not_after = signer.not_after and not_after < time then raise Gem::Security::Exception, "#{message} not valid after #{not_after}" end if issuer and not signer.verify issuer.public_key then raise Gem::Security::Exception, "#{message} was not issued by #{issuer.subject}" end true end
Verifies each certificate in chain
has signed the following
certificate and is valid for the given time
.
# File lib/rubygems/security/policy.rb, line 57 def check_chain chain, time raise Gem::Security::Exception, 'missing signing chain' unless chain raise Gem::Security::Exception, 'empty signing chain' if chain.empty? begin chain.each_cons 2 do |issuer, cert| check_cert cert, issuer, time end true rescue Gem::Security::Exception => e raise Gem::Security::Exception, "invalid signing chain: #{e.message}" end end
Verifies that data
matches the signature
created
by public_key
and the digest
algorithm.
# File lib/rubygems/security/policy.rb, line 76 def check_data public_key, digest, signature, data raise Gem::Security::Exception, "invalid signature" unless public_key.verify digest.new, signature, data.digest true end
Ensures the public key of key
matches the public key in
signer
# File lib/rubygems/security/policy.rb, line 113 def check_key signer, key unless signer and key then return true unless @only_signed raise Gem::Security::Exception, 'missing key or signature' end raise Gem::Security::Exception, "certificate #{signer.subject} does not match the signing key" unless signer.public_key.to_pem == key.public_key.to_pem true end
Ensures the root certificate in chain
is self-signed and valid
for time
.
# File lib/rubygems/security/policy.rb, line 131 def check_root chain, time raise Gem::Security::Exception, 'missing signing chain' unless chain root = chain.first raise Gem::Security::Exception, 'missing root certificate' unless root raise Gem::Security::Exception, "root certificate #{root.subject} is not self-signed " + "(issuer #{root.issuer})" if root.issuer.to_s != root.subject.to_s # HACK to_s is for ruby 1.8 check_cert root, root, time end
Ensures the root of chain
has a trusted certificate in
trust_dir
and the digests of the two certificates match
according to digester
# File lib/rubygems/security/policy.rb, line 150 def check_trust chain, digester, trust_dir raise Gem::Security::Exception, 'missing signing chain' unless chain root = chain.first raise Gem::Security::Exception, 'missing root certificate' unless root path = Gem::Security.trust_dir.cert_path root unless File.exist? path then message = "root cert #{root.subject} is not trusted".dup message << " (root of signing cert #{chain.last.subject})" if chain.length > 1 raise Gem::Security::Exception, message end save_cert = OpenSSL::X509::Certificate.new File.read path save_dgst = digester.digest save_cert.public_key.to_s pkey_str = root.public_key.to_s cert_dgst = digester.digest pkey_str raise Gem::Security::Exception, "trusted root certificate #{root.subject} checksum " + "does not match signing root certificate checksum" unless save_dgst == cert_dgst true end
For full_name
, verifies the certificate chain
is
valid, the digests
match the signatures
signatures
created by the signer depending on the
policy
settings.
If key
is given it is used to validate the signing
certificate.
# File lib/rubygems/security/policy.rb, line 210 def verify chain, key = nil, digests = {}, signatures = {}, full_name = '(unknown)' if signatures.empty? then if @only_signed then raise Gem::Security::Exception, "unsigned gems are not allowed by the #{name} policy" elsif digests.empty? then # lack of signatures is irrelevant if there is nothing to check # against else alert_warning "#{full_name} is not signed" return end end opt = @opt digester = Gem::Security::DIGEST_ALGORITHM trust_dir = opt[:trust_dir] time = Time.now _, signer_digests = digests.find do |algorithm, file_digests| file_digests.values.first.name == Gem::Security::DIGEST_NAME end if @verify_data then raise Gem::Security::Exception, 'no digests provided (probable bug)' if signer_digests.nil? or signer_digests.empty? else signer_digests = {} end signer = chain.last check_key signer, key if key check_cert signer, nil, time if @verify_signer check_chain chain, time if @verify_chain check_root chain, time if @verify_root if @only_trusted then check_trust chain, digester, trust_dir elsif signatures.empty? and digests.empty? then # trust is irrelevant if there's no signatures to verify else alert_warning "#{subject signer} is not trusted for #{full_name}" end signatures.each do |file, _| digest = signer_digests[file] raise Gem::Security::Exception, "missing digest for #{file}" unless digest end signer_digests.each do |file, digest| signature = signatures[file] raise Gem::Security::Exception, "missing signature for #{file}" unless signature check_data signer.public_key, digester, signature, digest if @verify_data end true end
Extracts the certificate chain from the spec
and calls verify to ensure the signatures and
certificate chain is valid according to the policy..
# File lib/rubygems/security/policy.rb, line 282 def verify_signatures spec, digests, signatures chain = spec.cert_chain.map do |cert_pem| OpenSSL::X509::Certificate.new cert_pem end verify chain, nil, digests, signatures, spec.full_name true end


Ruby on Rails Tutorial, Over the Hump
Ruby on Rails tutorial – Chapter 4-7/11
Chapter 4 was a primer on Ruby for Rails development. Having been using Ruby for almost 2 years, this was the easiest Chapter for me but possibly more intimidating for someone new to it.
Chapter 5 was the start of a huge Chapter and was essentially a fully functional app without using scaffolding. There were a lot of details but was very well presented. There were also a lot of other non-Rails development tools presented. At times, it’s not clear whether some tools are used occasionally or frequently. For example, the impression I get is that RSpec is used often; however, RSpec is not the default test tool. What about Spork? I find Spork incredibly useful because it speeds up testing. Spork was also one of the sources of great frustration because I spent an hour trying to find the source of a failed test, only to luck on a Stack Overflow post that suggested someone restart the Spork server because changes in the settings were not incorporated.
Chapter 6 and 7 describes user authentication. It could have been me but I went through this section without really getting what was going on. It was a “type this and this” sort of experience. Nothing stuck. Unfortunately, this seems like something that will be needed for most apps. Maybe if I make it through this book, going back for a second run through will make more sense. One things that may be tripping me up is that, it seems, the earlier chapters took the approach, “Type all this in first and I’ll explain it piece by piece.” The last two Chapters started explaining bits of code before any typing occured. I’m not sure if it’s having the context before the explanation or having a chance to think about it before the explanation, but I preferred the earlier approach.
One other problem I still have is the files. There are some files that make sense like the header and footer being under app/views/layouts/
. That makes sense. But there are a number of files that are created. I’m not sure if files and directories require specific names to be incorporated into the page.


{% extends 'selectivechat_app/base.html' %} {% load staticfiles %} {% block head %}
Please enter in the code of the chat room you want to join.


Everything start with a Hello! We’re here to answer any questions you may have and create an effective solution for your instructional needs.
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Afghanistan
Albania
Algeria
Angola
Antarctica
Argentina
Armenia
Australia
Austria
Azerbaijan
Bahamas
Bangladesh
Belarus
Belgium
Belize
Benin
Bhutan
Bolivia, Plurinational State of
Bosnia and Herzegovina
Botswana
Brazil
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Canada
Central African Republic
Chad
Chile
China
Colombia
Congo
Congo, the Democratic Republic of the
Costa Rica
Cote d'Ivoire
Croatia
Cuba
Cyprus
Czech Republic
Denmark
Djibouti
Dominican Republic
Ecuador
Egypt
El Salvador
Equatorial Guinea
Eritrea
Estonia
Ethiopia
Falkland Islands (Malvinas)
Fiji
Finland
France
French Southern Territories
Gabon
Gambia
Georgia
Germany
Ghana
Greece
Greenland
Guatemala
Guinea
Guinea-Bissau
Guyana
Haiti
Honduras
Hungary
Iceland
India
Indonesia
Iran, Islamic Republic of
Iraq
Ireland
Israel
Italy
Jamaica
Japan
Jordan
Kazakhstan
Kenya
Korea, Democratic People's Republic of
Korea, Republic of
Kuwait
Kyrgyzstan
Lao People's Democratic Republic
Latvia
Lebanon
Lesotho
Liberia
Libya
Lithuania
Luxembourg
Macedonia, the former Yugoslav Republic of
Madagascar
Malawi
Malaysia
Mali
Mauritania
Mexico
Moldova, Republic of
Mongolia
Montenegro
Morocco
Mozambique
Myanmar
Namibia
Nepal
Netherlands
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria
Norway
Oman
Pakistan
Palestinian Territory, Occupied
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Poland
Portugal
Puerto Rico
Qatar
Romania
Russian Federation
Rwanda
Saudi Arabia
Senegal
Serbia
Sierra Leone
Slovakia
Slovenia
Solomon Islands
Somalia
South Africa
South Sudan
Spain
Sri Lanka
Sudan
Suriname
Swaziland
Sweden
Switzerland
Syrian Arab Republic
Taiwan, Province of China
Tajikistan
Tanzania, United Republic of
Thailand
Timor-Leste
Togo
Trinidad and Tobago
Tunisia
Turkey
Turkmenistan
Uganda
Ukraine
United Arab Emirates
United Kingdom
United States
Uruguay
Uzbekistan
Vanuatu
Venezuela, Bolivarian Republic of
Viet Nam
Western Sahara
Yemen
Zambia
Zimbabwe


Money Play. Should Red double? If doubled, should White take?
pips Red=136 White=151
(CorrectAnswer= 0/0, ErrorScore= 0)
This position is certainly volatile and therefore, with gammons abounding, Red must double.
Red had only one game plan, the blitz. If that fails, he is likely to be in trouble as his checkers are somewhat disjointed. At the moment he has 10 checkers in the attack zone and two nearby.
Move one checker from Red’s mid-point to his 10-pt and the position becomes a pass but in the actual position White has a very comfortable take. Other than his two checkers on the bar he has no other weaknesses and his structure is sound. A good percentage of the time he will make an anchor in Red’s home board.
White will win the game 33% of the time, his only problem is that when he loses two-thirds of the time that loss will be a gammon.
Huge double, huge take. Dropping is worse than a double blunder.
Red had only one game plan, the blitz. If that fails, he is likely to be in trouble as his checkers are somewhat disjointed. At the moment he has 10 checkers in the attack zone and two nearby.
Move one checker from Red’s mid-point to his 10-pt and the position becomes a pass but in the actual position White has a very comfortable take. Other than his two checkers on the bar he has no other weaknesses and his structure is sound. A good percentage of the time he will make an anchor in Red’s home board.
White will win the game 33% of the time, his only problem is that when he loses two-thirds of the time that loss will be a gammon.
Huge double, huge take. Dropping is worse than a double blunder.
Cube analysis 2-ply cubeless equity +0.485 0.624 0.348 0.005 - 0.376 0.111 0.006 Cubeful equities: 1. Double, take +0.714 2. Double, pass +1.000 (+0.286) 3. No double +0.628 (-0.087) Proper cube action: Double, take


Stem cells - the latest revolution in modern
medicine is working wonders for many
patients all over the world. stem cells hold a
tremendous promise for treating many diseases,
including both type 1 diabetes (juvenile diabetes) and type 2 diabetes.
medicine is working wonders for many
patients all over the world. stem cells hold a
tremendous promise for treating many diseases,
including both type 1 diabetes (juvenile diabetes) and type 2 diabetes.
Is your child suffering from
juvenile diabetes? – Now is the right
time to think about his/her future.
juvenile diabetes? – Now is the right
time to think about his/her future.

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terms & conditions
1. service tax will be levled extra as applicable.
2. pathological test report (for sugar levels testing), along with a doctor's prescription is the documentation (medical proof)
required for confirming diabetes. this is mandatory to avail of this preferential pricing.
3. payment shall be full upfront
1. service tax will be levled extra as applicable.
2. pathological test report (for sugar levels testing), along with a doctor's prescription is the documentation (medical proof)
required for confirming diabetes. this is mandatory to avail of this preferential pricing.
3. payment shall be full upfront


Data activist @ OCIO • Inside Airbnb
18 Nov. 2020 • AirBnB and the Digital Services Act, organized by Greens/EFA in the European Parliament
6,963 short-term rentals
28,004 total tourist beds
Source Portale GeoIDS of the Ufficio Tributi of the City of Venice • Data as of June 24, 2020“Airbnb fights overcrowding and reduces mass tourism concentration”
Airbnb Helps Fight Mass Tourism, Promotes Sustainable Travel by Airbnb (2018)“Airbnb is a people-to-people platform—we are of the people, by the people andfor the people—that provides economic empowerment by bringing real benefits to those who share their homes. Founded in 2008, Airbnb is democratizing capitalism [...]”
Airbnb Policy Tool Chest Report by Airbnb (2016)Data activist @ OCIO • Inside Airbnb
18 Nov. 2020 • AirBnB and the Digital Services Act, organized by Greens/EFA in the European Parliament


Class ViewContext
The view context attached to this controller
Constructor
-
class ViewContext(component)
-
Methods
getRoot
-
ViewContext#getRoot(dom)
| Arguments: |
- dom (Boolean) – True to return the DOM element
|
| Returns HtmlElement: |
| | The component’s container element
|
Returns the DOM container element for the component associated with this
view context.
getWebSocket
-
ViewContext#getWebSocket(url)
-
Method used to obtain a web socket for which a handler was defined into this
component.
publish
-
ViewContext#publish(eventName, data)
-
This is the method that will publish an event
and will execute all registered callbacks.
subscribe
-
ViewContext#subscribe(eventName, callback)
| Arguments: |
- eventName – Event name we want to subscribe to. Can be any string value.
- callback –
- This is the callback method that will get executed. It must have
a single parameter called data.
Ex: function(data)
|
This is the method that allows registration of a callback method to a
desired event.
unsubscribe
-
ViewContext#unsubscribe(eventName, callback)
| Arguments: |
- eventName – Event name we want to subscribe to. Can be any string value.
- callback –
- This is the callback method that will get executed. It must have
a single parameter called data.
Ex: function(data)
|
Unsubscribe from an event


Students Record
Add New
Name
Registration
Department
{% for student in students %}
{{ student.name }}
{{ student.registration }}
{{ student.department }}
{% endfor %}


Anazone - Shopping zone to find anything you need !
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Hong Kongers flock to polls as democracy camp seeks to send message
by AFPIn Summary
- Lengthy queues snaked out of polling stations across the territory in the election for 18 district councils, where high turnout is expected to benefit democratic forces.
- The selection of 452 councillor traditionally generates little excitement, but has taken on new significance following months of political unrest.
- The pro-democracy camp is calling Sunday's vote a referendum on Chief Executive Carrie Lam and the pro-Beijing government, who have resisted the movement's demands.
Hong Kong,
Hong Kong's voters turned out in record numbers Sunday for local council elections that the city's pro-democracy movement hopes will add pressure on the Beijing-backed government to heed their demands after months of violent protest.
Lengthy queues snaked out of polling stations across the territory in the election for 18 district councils, where high turnout is expected to benefit democratic forces.
The government said over a third of the record 4.13 million citizens registered to vote had cast their ballots within seven hours of polls opening, on track for a record and more than double the rate seen over the same timeframe during the last election in 2015.

Related Stories
-
Hong Kong campus stalemate persists
-
Fiery stand-off at Hong Kong varsity
-
Hong Kong leads anti-China rallies
-
Human chains as Hong Kong students protest
Advertisement
Hong Kong has been buffeted by months of mass rallies and violent clashes pitting police against protesters who are agitating for direct popular elections of the semi-autonomous Chinese territory's government as well as a probe into alleged police brutality.
District councils have long been dominated by the pro-Beijing establishment, and voters seeking change hope that weakening that grip will give their movement fresh momentum.
"Even though one ballot can only help a little, I still hope it can bring change to society and support street protests in some way," 19-year-old student Michael Ng, voting for the first time, told AFP.
DIRECT REPRESENTATION
The vote is the closest Hong Kongers get to direct representation.
The territory's top-level legislature is elected by a mix of popular vote and seats reserved for industry groups stacked with China loyalists, which ensures Beijing's control of the city of around 7.3 million.
The pro-democracy camp is calling Sunday's vote a referendum on Chief Executive Carrie Lam and the pro-Beijing government, who have resisted the movement's demands.
"We are voting to give our judgement on what has happened... we're also voting to make a choice for what is yet to come," said Jimmy Sham, a pro-democracy candidate and a prominent figure in the largely leaderless protest movement.
But the polls are not entirely symbolic: some candidates for next year's legislative elections will be drawn from district councillors, and the bodies also will contribute 117 members to the 1,200-strong Beijing-controlled electoral college that chooses the chief executive.
PEACE
Protests have been muted in recent days after pro-democracy figures urged citizens to cease disruptions to avoid giving the government an excuse to delay or suspend the polls.
Police were deployed at some polling stations and on city streets, but their presence was not particularly heavy.
No violence or other disturbances were reported.
"I'm pleased to say that... we should have a relatively peaceful and calm environment to conduct these elections successfully," Lam said after voting in her constituency on Hong Kong island.
RALLIES
The political unrest kicked into high gear with giant rallies in June against a bill backed by Lam that would allow extraditions to China's opaque justice system.
The bill was eventually withdrawn amid public pressure, but the anger that it unleashed sparked wider calls for democracy.
Analysts expect pro-democracy candidates to see gains in the district councils but still fall short of a majority of slots.
Campaigning has been marred by acrimony, with one pro-democracy candidate having his ear bitten off in an attack, while 17 other candidates of all stripes have been arrested over protest-related activities.
Election authorities banned leading democracy activist Joshua Wong from running in the district poll for backing Hong Kong "self-determination".


Graduate Student in USC
How to understand HTTP?
Mar 13, 2018 / Written by Chengyu
The internet permeates into our life nowadays. Thanks to the appearances of various web-related applications, everyone could visit website conveniently. However, even though the majority of websites starting with http(s), only a few cybercitizens know the meaning of this. In order to get a better understanding of HTTP, this article explain this protocol's mechanism in an easy way.
Definition:
How the server and client communicate?
The system architecture of HTTP is a client-server architecture, in which the client knows the identity of server but the server doesn’t have any information of client. In other word, the server can merely response the client’s request after it sent it, and we called it as “Stateless”. Even though the browser may use cookie or the website may use session, the HTTP itself is stateless and it doesn’t remember the state of client. HTTP requires clients and servers to use text messages for communication. The general format of this text message is like this:
HTTP Message Format
Specifically, we could separate the text message into client-side and server-side respectively:
HTTP Request Format
The request line has rigid format: method request-URI HTTP version
e.g.: request line: GET /test.html HTTP/1.1
The request header specify header attributes with header-name
e.g.:
HOST: jwssdwed.github.io
ACCEPT: image/gif
ACCEPT-Language: en, cn
For the detailed information, you can visit: HTTP_header_wiki
The status code contains protocol version and HTTP status code:
e.g. HTTP/1.1 200 OK
Detailed information about status code: Status_Code
And the response header performs similarly to the request header.
HTTP Request Format
The returned html context will be encapsulated in the body part in response message. And the browser, like Google Chrome, parses those information and renders in the browser.


--- ---
... uses System.SysUtils... ... var ... temp_str: String; begin ... { double quote a string that has spaces } if StrScan(PChar(temp_str), Chr($20)) <> nil then temp_str := AnsiQuotedStr(temp_str, Chr($22)); ...
$20
is the the space character; $22
is the
double-quote character.
I know that QuoteSpacedString in the DelphiDabbler Code Snippets Databasedoes the same thing. The above if statement may be faster for strings that
can only have $20
as a white space character such as a file path.
Tested on RAD Studio XE3.


Back to last page
Back to home page
Report error
Click
here
or just write to me on:
<EMAIL_ADDRESS>Please paste error content to mail.
It'll help me in debug :D


Easy Classes
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(+91)8168496550 (+91)7015620361<EMAIL_ADDRESS>kanikajindal001@gmail.com


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The numbers on the top are the calculated resolutions for the image:
number in green is the image selected. While number in gray is the next lower and number in red is the next higher candidate.
The image on the left side has the data-optimumx
attribute attached, while the same image on the right side is always loaded with the full density.
As you will see with this demo. Some images do gain significant quality with retina, but some others don't. The standard HTML responsive image markup has no way to tell the browser about does differences, therefore the browser often can't make educated decisions. The optimumx plugin solves this by limiting the source canidates to reasonable ones.
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This is a list of Indian dishes. Indian cuisine encompasses a wide variety of regional cuisine native to India. Given the range of diversity in soil type, climate and occupations, these cuisines vary significantly from each other and use locally available such as: chocolates, herbs, vegetables and fruits. The dishes are then served according to taste in either mild, medium or hot. Indian food is also heavily influenced by religious and cultural choices, like Hinduism and traditions. Some Indian dishes are common in more than one region of India, with many vegetarian and vegan dishes. Some ingredients commonly found in Indian dishes include, chicken, rice, ginger and spices.


Daily activities (Total: {{ tasks.length }} - Remainig: {{ remaining }} - Completed: {{ completed }})
No tasks yet!
Italian Cities (Total: {{ cities.length }} - Remainig: {{ remaining }} - Visited: {{ visited }})
{{ $data | json }}
European Cities (Total: {{ cities.length }} - Remainig: {{ remaining }} - Visited: {{ visited }})
World Cities (Total: {{ cities.length }} - Remainig: {{ remaining }} - Visited: {{ visited }})
{{ city.name }}


Namespace namespace
#include <File.h>
A namespace.
Enums
Typedefs
- using Typedef = int
- A typedef.
- using TypedefBrief = int
- Typedef with just a brief.
Functions
Variables
- int Variable constexpr
- A variable.
- int VariableBrief constexpr
- Variable with just a brief.
Enum documentation
Typedef documentation
Function documentation
void Namespace:: foo(float)
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
Function overload with no brief.


{{name}}
Increase
Decrease
Increase Second
Counter: {{counter}} | {{secondCounter}}
Result: {{result()}} | {{output}}


Wave Pool
Wave Pool is an interactive learning experience that uses gestures as a tool to understand the physics of sound.
Created at the Edesign Lab Hackathon 2013 by: Katherine Bennett, Ibrahim Ekin, Gabe Liberti, Dave Rife, and Kevin Siwoff
How might we engage students using embodied learning to inspire creative inquiry in the classroom?
Our focus is on middle school - high school students
Our tools:
-
XBox Kinect
-
Hand/Skeleton tracking software (OpenNI library for C++)
-
Max/MSP
-
HTML5/Javascript
Learning example:
The wavelengths of sound
(An HTML5 demo)
WavePool gesture interface demo
Collaboration, Synthesis, Participation


I am a PhD student at Korea Advanced Institute of Science and Technology (KAIST) advised by Professor Jaegul Choo. I am mainly interested in robustness of AI, previously focused on debiasing and addressing domain shifts in image classification.
[Apr 2023] I started my regular position as a machine learning research engineer at Qualcomm Korea.
[Apr 2023] I finished my internship at Qualcomm Korea.
[Oct 2022] I started my internship at Qualcomm Korea.
[Aug 2022] I finished my internship at AI Lab, Kakao Enterprise.
[Aug 2021] I started my internship at AI Lab, Kakao Enterprise.
[July 2023] Our "Wisdom of Crowds" paper was accepted at ICCV 2023.
[July 2023] Our "CAFA" paper was accepted at ICCV 2023.
[June 2023] Our "ReLD" paper was accepted at ECML/PKDD 2023.
[Feb 2023] Our "EcoTTA" paper was accepted at CVPR 2023.
[Nov 2022] Our "BiasEnsemble" paper was accepted as oral presentation at AAAI 2023.
[April 2022] Our "DASH" paper was accepted at EuroVis 2022 (Short paper).
[Oct 2021] Our "Inter-Prototype (Face)" paper was accepted at BMVC 2021.
[Sep 2021] Our "Debiasing" paper was accepted as oral presentation at NeurIPS 2021.
[July 2021] Our "SML" paper was accepted as oral presentation at ICCV 2021.
Towards Open-set Test-Time Adaptation Utilizing the Wisdom of Crowds in Entropy Minimization.
Jungsoo Lee, Debasmit Das, Jaegul Choo, and Sungha Choi.
ICCV 2023
CAFA: Class-Aware Feature Alignment for Test-Time Adaptation
Sanghun Jung, Jungsoo Lee, Nanhee Kim, Amirreza Shaban, Byron Boots, and Jaegul Choo
ICCV 2023
[Arxiv]
Deep Imbalanced Time-series Forecasting via Local Discrepancy Density.
Junwoo Park, Jungsoo Lee, Youngin Cho, Woncheol Shin, Dongmin Kim, Jaegul Choo, and Edward Choi.
ECML/PKDD 2023
[Arxiv]
EcoTTA: Memory-Efficient Continual Test-time Adaptation via Self-distilled Regularization.
Junha Song, Jungsoo Lee, In So Kweon, and Sungha Choi.
CVPR 2023
[Arxiv]
DASH: Visual Analytics for Debiasing Image Classification via User-Driven Synthetic Data Augmentation.
Bum Chul Kwon, Jungsoo Lee, Chaeyeon Chung, Nyoungwoo Lee, Ho-jin Choi, and Jaegul Choo.
EuroVis 2022 (Short paper)
Love in Lyrics: An Exploration of Supporting Textual Manifestation of Affection in Social Messaging
Taewook Kim, Jungsoo Lee, Zhenhui Peng, and Xiaojuan Ma
CSCW 2019
[ACM DL]


These notes describe the difference between Apache Derby release <IP_ADDRESS> and the preceding release <IP_ADDRESS>.
The most up to date information about Derby releases can be found on the Derby download page.
Apache Derby is a pure Java relational database engine using standard SQL and JDBC as its APIs. More information about Derby can be found on the Apache web site. Derby functionality includes:
Java and JDBC versions supported:
This is a bug fix release. There are no new features:
Compared with the previous release (<IP_ADDRESS>), Derby release <IP_ADDRESS> introduces the following incompatibilities. These merit your special attention.
Additional permission needed to run Derby network server
An additional java.net.SocketPermission, "listen" was added to the default network server policy file, and the policy file template. The documentation was updated to describe this permission.
No incompatibilities arise from upgrading a Derby release to one with the additional permissions in the policy file.
However, unless you have this permission, when upgrading to a JVM release that has JDK 7u51 incorporated, your network server may not start if
An additional permission may be needed in order to bring up the Derby network server after upgrading to JVMs incorporating JDK 7u51. In particular, the startup scripts may fail to boot the network server.
This is a result of the "Better applet networking" changes made for JVM issue 8011787 (not public): the default socket permissions assigned to all code including untrusted code have been changed.
Previously, all code was able to bind any socket type to any port number greater than or equal to 1024. It is still possible to bind sockets to the ephemeral port range on each system. The exact range of ephemeral ports varies from one operating system to another, but it is typically in the high range (such as from 49152 to 65535).
The new restriction is that binding sockets outside of the ephemeral range now requires an explicit permission in the system security policy.
After upgrading to a JVM with these changes, while attempting to boot, the network server may fail and raise the following error:
For more information on Derby security policies, see the Derby Admin Guide sections titled Network Server security and Running the Network Server under the security manager.
If you are using replication, a similar permission must be granted to the security policy for the slave server. Add the following permission to the ${derby.install.url}derby.jar codebase:
With this fix, the default policy file has received these required permissions, and the scripts in the bin directory work again. However, it may still be necessary to adjust any customized policy files.
Applications need not make any change to take advantage of the new permission granted in the default policy file. However, the default policy file may, or may not be sufficient for specific applications and it is better to use your own policy file. If you have your own policy file, you may need to adjust it to add the "listen" permission as appropriate.
After the fix, statement level update triggers defined on specific columns will only fire for the update of any of those specified columns. Additionally, after the fix, statement level update triggers defined at the table level will fire correctly for columns added after the CREATE TRIGGER sql is issued.
Statement level update triggers defined for specific columns fired on update of columns which were not included in the CREATE TRIGGER sql. Also, statement level update triggers defined at table level did not fire for newly added columns.
Derby releases <IP_ADDRESS>, <IP_ADDRESS>, <IP_ADDRESS>, <IP_ADDRESS> suffer from DERBY-6383 and will see 1)update statement triggers defined at column(s) level firing for columns not specified in the column list of the "CREATE TRIGGER... AFTER UPDATE... OF" clause 2)update statement triggers defined at table level not firing for columns added to the table after CREATE TRIGGER was issued.
The fix for the regression identified in DERBY-6383 will now make update statement level triggers adhere to SQL standards.
In order to fix the buggy triggers created in the above mentioned releases, users will need to manually drop and recreate the statement level update triggers in a release with DERBY-6383 fix. All statement level update triggers, whether they are defined on specific columns or at the table level, should be dropped and recreated.
Frame injection vulnerability in old versions of the API documentation.
Many of the previous releases of Apache Derby were built with JDK versions whose javadoc tool produced HTML files that had a frame injection vulnerability (CVE-2013-1571). The API documentation bundled with this version of Apache Derby has been built with a version of the javadoc tool that does not suffer from the vulnerability.
The change removes a vulnerability.
API documentation for old versions of Apache Derby on public-facing web servers should be fixed by
New SQLPermission needed for JDBC driver deregistration on Java SE 8.
The symptoms are only seen when running an application under a Java security manager on Java SE 8 or later.
When running the Apache Derby embedded driver under a Java security
manager on Java SE 8, the embedded driver will not be deregistered
during system shutdown
unless SQLPermission("deregisterDriver")
has been granted
to derby.jar.
If this situation has occurred, the following message will be printed to the Derby error log (derby.log) along with a stack trace that tells where the call was made:
Could not deregister the JDBC driver during engine shutdown. Make sure SQLPermission("deregisterDriver") is granted to derby.jar.
Also, if an application attempts to deregister a JDBC driver by
calling java.sql.DriverManager.deregisterDriver()
directly, it may fail with an AccessControlException. This is not
limited to the Apache Derby embedded driver; it will happen for any
JDBC driver, including the Apache Derby network client driver.
When running on Java SE 7 or earlier, shutting down an embedded Derby
engine would also deregister the embedded driver
from java.sql.DriverManager
's list of JDBC drivers.
When running on Java SE 8 or later, the embedded driver will still be
registered after shutdown if derby.jar is not allowed to
invoke java.sql.DriverManager.deregisterDriver()
.
This is a change in the java.sql.DriverManager
class in Java
SE 8. It is not a change in Apache Derby.
Applications that run under a Java security manager, and that depend
on the driver being deregistered as a side-effect of shutting down the
embedded engine, need to
grant java.sql.SQLPermission("deregisterDriver")
to derby.jar.
Applications that run under a Java security manager, and that
call java.sql.DriverManager.deregisterDriver()
directly,
need to grant java.sql.SQLPermission("deregisterDriver")
to the application code base, and possibly also change the call
to deregisterDriver()
to go
through java.security.AccessController.doPrivileged()
.
When running a server started from the command line with a security manager and a customized policy file, new permissions may be have to be added to it.
Running the server will fail with a AccessControlException indicating a missing permission, whereas running the server in the same way used to work before upgrading Derby.
derby.storage.useDefaultFilePermissions
in the Reference Manual.
Cf. also Derby issue DERBY-5363.
Note: for other configurations, this policy must be explicitly enabled, e.g when starting the server via the Java API. Similarly, embedded Derby doesn't use the new policy by default. If you enable the new policy in such configurations and a security manager is used, you will need to add the permission described below to the Java security policy file.
derbynet.jar
:
permission java.lang.RuntimePermission "accessUserInformation"; permission java.lang.RuntimePermission "getFileStoreAttributes"; permission java.util.PropertyPermission "derby.__serverStartedFromCmdLine", "read, write";
derby.jar
permission java.lang.RuntimePermission "accessUserInformation"; permission java.lang.RuntimePermission "getFileStoreAttributes";
demo/templates/server.policy
and the
section Customizing the Network Server's security policy in
the Derby Server and Administration Guide.
Datatype Change in JDBC Metadata
The datatype has changed for two of the columns in the ResultSet returned by DatabaseMetadata.getIndexInfo(). Previously, the CARDINALITY and PAGES columns were INTs. Now they are BIGINTs.
JDBC 4.2 changed the datatype of these columns.
Note that on Derby, the contents of these columns is always NULL. Applications may need to be recoded if they expect the metadata for these columns to report that they have INT type rather than BIGINT type.
The meaning of SYS.SYSTRIGGERS.CREATIONTIMESTAMP has changed.
In earlier versions of Apache Derby, the SYS.SYSTRIGGERS.CREATIONTIMESTAMP column would tell what time the system clock showed, represented in the local time zone of the database, at the time the trigger was created.
In databases whose format is upgraded to 10.11 or later, this column now represents the time the trigger was created in the UTC time zone. Existing values are not changed in the upgrade, so the creation timestamps for any triggers created before the upgrade will still be represented in the local time zone.
Furthermore, logic has been added to make the values in that column monotonically increasing, so in some special cases (especially if the system clock has been adjusted back in time, or if the database has been moved to a machine whose system clock is behind the clock on the original machine) the column may contain a value that is not equal to the time the trigger was created. The latter change also takes effect if the database format has not been upgraded to 10.11 or later.
The purpose of the SYS.SYSTRIGGERS.CREATIONTIMESTAMP column is to make it possible to fire triggers in the order in which they were created. A timestamp in the local time zone is not ideal for this purpose because there are ambiguities in time zones that observe daylight saving time. Also, there could be ambiguities when moving a database to a machine in another time zone. Storing the timestamp in UTC avoids both of these problems.
Another problem that was seen, was that triggers that were created quickly after each other, could sometimes end up with the exact same creation timestamp. This meant that the execution order for those triggers was non-deterministic. The timestamp of a new trigger is now adjusted so that it is higher than the timestamp of any other existing trigger on the same table. This makes sure the triggers are executed in the order in which they were created.
Most applications should not be affected by this change in any way. Any applications that read the values stored in SYS.SYSTRIGGERS.CREATIONTIMESTAMP should take into account that this column doesn't necessarily tell the exact time the trigger was created, because it contains a value that may have been adjusted in order to ensure the correct execution order.
The following issues are addressed by Derby release <IP_ADDRESS>. These issues are not addressed in the preceding <IP_ADDRESS> release.
|
Issue Id
| Description |
|---|---|
| DERBY-6513 | Warnings when building 10.10 branch with Java 8 |
| DERBY-6477 | OutOfMemoryError selecting from SYS.SYSALIASES |
| DERBY-6463 | localcal demo seems to be obsolete and should be removed |
| DERBY-6457 | NetworkServerControl API breaks when username or password contains non-ascii characters |
| DERBY-6456 | Infinite loop in NetworkServerControlImpl when reply >= 32k |
| DERBY-6455 | Infinite loop in NetworkServerControlImpl.ensureDataInBuffer |
| DERBY-6443 | ArrayIndexOutOfBoundsException when calling function from trigger |
| DERBY-6438 | Explicitly grant SocketPermission "listen" in default server policy |
| DERBY-6426 | Fix isLoginException |
| DERBY-6411 | Minimal select privilege should be checked in subqueries |
| DERBY-6408 | EXISTS returns NULL instead of FALSE |
| DERBY-6396 | NullPointerException in DirFile |
| DERBY-6387 | Incorrect ordering of triggers in dblook |
| DERBY-6383 | Update trigger defined on one column fires on update of other columns |
| DERBY-6374 | Bulk insert of data with nullable UNIQUE constraint fails to detect duplicates |
| DERBY-6373 | NPE in Statement.getWarnings() |
| DERBY-6371 | DROP COLUMN looks in wrong schema when checking trigger dependencies |
| DERBY-6363 | Incorrect evaluation of logical expressions in CASE |
| DERBY-6361 | Valid statements rejected if Derby has not implicitly created the current user's schema. |
| DERBY-6357 | CREATE TRIGGER doesn't detect all illegal references to SESSION schema |
| DERBY-6351 | Syntax error on equal transition table name and correlation name in statement trigger |
| DERBY-6348 | NPE or assert failure in recursive trigger |
| DERBY-6346 | NPE in left join whose inner table has a generated column |
| DERBY-6338 | Remove Profile attribute from jar file manifests |
| DERBY-6324 | DatabaseMetaData.getJDBCMinorVersion() should return 2 now that we've implemented JDBC 4.2 |
| DERBY-6323 | Fix incorrect @throws and @exception tags in javadoc |
| DERBY-6320 | Log a page dump to derby.log if ERROR nospc: nospc.U is returned to the user |
| DERBY-6317 | Optmizer can choose the wrong path when BTreeCostController.java returns an estimate cost and row count of 0.0 |
| DERBY-6314 | Upgrade from 10.10 fails with ClassCastException |
| DERBY-6297 | Intermittent failures in XplainStatisticsTest.testSimpleXplainOnly |
| DERBY-6283 | indexStat daemon processing tables over and over even when there are no changes in the tables in soft upgraded database. |
| DERBY-6273 | NullPointerException when using more than one parameter in COALESCE |
| DERBY-6270 | Run Java API Documentation Updater Tool on the published javadocs |
| DERBY-6268 | Run-time statistics not collected if query contains always false predicate |
| DERBY-6258 | Restrict permissions on BACKUP.HISTORY |
| DERBY-6224 | Issues with latest JDK 8 EA build because of missing SQLPermission |
| DERBY-6221 | Can't select from SYS.SYSUSERS if you use a WHERE clause in the query |
| DERBY-6216 | XPLAIN feature does not work and gives ERROR XCL16: ResultSet not open |
| DERBY-6212 | NullPointerException when calling a procedure with sub-query as argument |
| DERBY-6209 | Add release note omitted with 10.9 for new required Security Manager permissions after DERBY-5363 |
| DERBY-6189 | NPE involving temporary table and rollback |
| DERBY-6187 | Add a release note for metadata datatype changes introduced by JDBC 4.2 |
| DERBY-6185 | Query against view with "where name LIKE 'Col1' ESCAPE '\' " failed |
| DERBY-6167 | Interrupt restarts clock for login timeout |
| DERBY-6157 | text for message XSLA4 might encouraging people to delete part of the transaction log |
| DERBY-6151 | Derby does not report warnings raised by table functions |
| DERBY-6148 | Wrong sort elimination when using permuted join order |
| DERBY-6137 | update/delete statement on table with trigger fails randomly with ERROR XSTA2 |
| DERBY-6131 | select from view with "upper" and "in" list throws a ClassCastException |
| DERBY-6114 | OOME in XAMemTest.testDerby4137_TransactionTimeoutSpecifiedNotExceeded |
| DERBY-6092 | testPositionAgressive(org.apache.derbyTesting.functionTests.tests.jdbcapi.BlobClob4BlobTest)j fails with : 'The handle is invalid.: java.io.IOException'. |
| DERBY-6047 | NPE in StaticCallMethod#coerceMethodParameter with a constant argument to INOUT parameter |
| DERBY-6045 | in list multi-probe by primary key not chosen on tables with >256 rows |
| DERBY-5979 | ant release target creates a release.properties that has conflicting line endings so automatic checkin fails |
| DERBY-5886 | FILE_CANNOT_REMOVE_FILE exception prints garbage. |
| DERBY-5866 | testFiringConstraintOrder(org.apache.derbyTesting.functionTests.tests.lang.TriggerTest)junit.framework.AssertionFailedError: matching triggers need to be fired in order creation:1,NO CASCADE BEFORE,DELETE,ROW |
| DERBY-5865 | On IBM 1.7 TestDurabilityProperty fails with FAIL -- derby.system.durability=test mode seems to be broken. |
| DERBY-5823 | Multi-row insert fails on table without generated keys with RETURN_GENERATED_KEYS |
| DERBY-5610 | ServerPropertiesTest prints .java.net.SocketException: Connection reset to console but test passes |
| DERBY-5560 | Java deadlock between LogicalConnection40 and ClientXAConnection40 (patch attached) |
| DERBY-5553 | System property for client tracing -Dderby.client.traceDirectory does not work with XADataSource |
| DERBY-5416 | SYSCS_COMPRESS_TABLE causes an OutOfMemoryError when the heap is full at call time and then gets mostly garbage collected later on |
| DERBY-4923 | update of a long row can fail with ERROR nospc: nospc.U exception. |
| DERBY-4753 | "ERROR 42X01: Syntax error: FALSE." during call to java.sql.DatabaseMetaData.getIndexInfo |
| DERBY-4729 | add more information to the XACT_PROTOCOL_VIOLATION returned from store. |
| DERBY-4160 | getMetaData().getIndexInfo crashes with "ERROR X0Y68: Column 'PARAM1' already exists." |
| DERBY-3940 | Dropping a column does not drop triggers which mention that column |
| DERBY-2130 | Optimizer performance slowdown from 10.1 to 10.2 |
| DERBY-896 | Cast date to timestamp results in "ERROR 42846: Cannot convert types 'DATE' to 'TIMESTAMP'." |
The following issues are addressed by Derby release <IP_ADDRESS>. These issues are not addressed in the preceding <IP_ADDRESS> release.
|
Issue Id
| Description |
|---|---|
| DERBY-6473 | Manuals are inconsistent in subsubprotocol information |
| DERBY-6448 | Document new SocketPermission in Network Server policy file |
| DERBY-6415 | SYSCS_DIAG.SPACE_TABLE sample query to show all tables and indexes should include schema |
| DERBY-6403 | Doc for export/import in ref man should mention automatic commit after operation. |
| DERBY-6399 | clarify backup section in Derby Server and Administration Guide regarding connecting to the backed up db |
| DERBY-6394 | Fix problems with searchCondition and Boolean expression documentation in Reference Manual |
| DERBY-6389 | Update adminguide's list of differences between client and embedded |
| DERBY-6388 | Example WHERE CURRENT OF clause in Reference Guide is nonsense |
| DERBY-6379 | Manuals are inconsistent in their use of the <shortdesc> element |
| DERBY-6376 | Revise DatabaseMetaData section of Reference Manual |
| DERBY-6375 | Suggest use of indexes in devguide's deadlock avoidance topic |
| DERBY-6369 | Make bullet lists into tables in two Reference Manual topics |
| DERBY-6367 | Reference Manual incorrectly states that you can't schema-qualify constraint names |
| DERBY-6355 | Data Integrity guidelines should include not deleting or otherwise tampering with files under the database directory |
| DERBY-6353 | Update syntax description in Getting Started, use in Reference Manual too |
| DERBY-6316 | Small typos in devguide examples |
| DERBY-6298 | Documentation implies column NOT NULL constraint cannot be named, but it can be. |
| DERBY-6239 | Document optional permission SQLPermission("deregisterDriver") |
| DERBY-6165 | The shutdown documentation should mention that a shutdown attempt could fail if login timeouts are enabled. |
| DERBY-6160 | Fixes needed to documentation topics on security policy permissions |
| DERBY-6129 | Reference Manual gives incorrect datatype for SYSCOLUMNS.COLUMNNAME |
| DERBY-6127 | Tell users to make sure that the state of a user-defined aggregate needs to be serializable |
| DERBY-6123 | Optional tools documentation in the reference guide should mention that optional tools require derbytools.jar be in the CLASSPATH |
| DERBY-6121 | Regularize how we refer to object names in the Reference Manual |
| DERBY-6120 | Clarify that $ is the separator character which should be used for the external names of static nested classes |
| DERBY-6116 | Confusing description of limitation on user-defined aggregate names. |
| DERBY-6103 | Improve documentation of ROW_NUMBER function |
| DERBY-6090 | Package javadoc publishedapi/jdbc4/index.html out of date |
| DERBY-5244 | DatabaseMetaData.getColumns(null, null, tableName, null) does not return the columns meta for a SYNONYM |
| DERBY-4847 | Errors should be displayed if using wrong CLASSPATH to make documentation target for release |
| DERBY-4629 | Explicitly document how to get case-insensitive sorts and comparisons of string data |
| DERBY-4628 | The Derby docs would be clearer if we replaced our jargon term "territory" with the term "locale" which is used commonly across the Java ecosystem. |
| DERBY-4627 | Document how to install your own custom collation for use in sorting and comparing string data values. |
| DERBY-4280 | Property not documented - derby.language.statementCacheSize |
Derby release <IP_ADDRESS> was built using the following environment:
It is essential that you verify the integrity of the downloaded files using the PGP and MD5 signatures. MD5 verification ensures the file was not corrupted during the download process. PGP verification ensures that the file came from a certain person.
The PGP signatures can be verified using
PGP or
GPG.
First download the Apache Derby
KEYS
as well as the asc
signature file for the particular
distribution. It is important that you get these files from the ultimate
trusted source - the main ASF distribution site, rather than from a mirror.
Then verify the signatures using ...
% pgpk -a KEYS % pgpv db-derby-X.Y.tar.gz.asc or % pgp -ka KEYS % pgp db-derby-X.Y.tar.gz.asc or % gpg --import KEYS % gpg --verify db-derby-X.Y.tar.gz.asc
To verify the MD5 signature on the files, you need to use a program
called md5
or md5sum
, which is
included in many unix distributions. It is also available as part of
GNU
Textutils. Windows users can get binary md5 programs from here, here, or
here.
We strongly recommend that you verify your downloads with both PGP and MD5.


This is a personal project I created using a David Bowie photo reference and illustrating it with a polygonal/3d effect. This project required me to map a number of triangles across Bowie's face. After the illustration was created, I applied the image on a cd mockup template to verify the effectiveness of the concept.


Imaging FlowCytobot is designed to operate underwater for long periods of time, connected to land via optical fiber and power cables. It has been continuously deployed at the Martha's Vineyard Coastal Observatory for over six years and has collected hundreds of millions of phytoplankton images with associated photomultiplier data.
Each mosaic that you see on the page is a visual summary of the largest objects seen by IFCB in a given 20-minute span. This is typically only a small fraction of the ~5-10,000 images IFCB collects in that amount of time. Mouse over each image to enlarge it and show associated data.
In the large mosaic, click on an image to see the full-size image and its data. Each image has a URL such as:
http://ifcb-data.whoi.edu/IFCB1_2011_285_070942_01711.html
Which can be emailed, shared, or posted to a social network. Images also have URL's that return machine-readable metadata in formats such as XML, JSON, and RDF. These are formed simply by using the appropriate extension, like this:
http://ifcb-data.whoi.edu/IFCB1_2011_285_070942_01711.xml
In the smaller mosaics, click anywhere in the mosaic to make it the large mosaic and show earlier time spans as smaller mosaics. In effect this navigates back in time. All timestamps are in the UTC (sometimes called GMT) timezone.
Below each mosaic is a brief description, as well as links where you can download the data associated with a bin in CSV, XML, or RDF formats. Note that the XML and RDF formats only provide links to individual images.
Note: this application is still under development. It may take a long time for some images to load. Please be patient.


| 1 | /* | |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 3 | * or more contributor license agreements. See the NOTICE file | |
| 4 | * distributed with this work for additional information | |
| 5 | * regarding copyright ownership. The ASF licenses this file | |
| 6 | * to you under the Apache License, Version 2.0 (the | |
| 7 | * "License"); you may not use this file except in compliance | |
| 8 | * with the License. You may obtain a copy of the License at | |
| 9 | * | |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 11 | * | |
| 12 | * Unless required by applicable law or agreed to in writing, | |
| 13 | * software distributed under the License is distributed on an | |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 15 | * KIND, either express or implied. See the License for the | |
| 16 | * specific language governing permissions and limitations | |
| 17 | * under the License. | |
| 18 | */ | |
| 19 | package org.apache.empire.exceptions; | |
| 20 | ||
| 21 | import org.apache.empire.commons.ErrorType; | |
| 22 | import org.slf4j.Logger; | |
| 23 | import org.slf4j.LoggerFactory; | |
| 24 | ||
| 25 | public class BeanInstantiationException extends EmpireException | |
| 26 | { | |
| 27 | // Logger | |
| 28 | private static final Logger log = LoggerFactory.getLogger(BeanInstantiationException.class); | |
| 29 | | |
| 30 | /** | |
| 31 | * Comment for serialVersionUID | |
| 32 | */ | |
| 33 | private static final long serialVersionUID = 1L; | |
| 34 | | |
| 35 | public static final ErrorType errorType = new ErrorType("error.beanInstantiationFailed", "Unable create an instance of type {0}."); | |
| 36 | | |
| 37 | public BeanInstantiationException(Class<?> clazz, Throwable cause) | |
| 38 | { | |
| 39 | super(errorType, new String[] { clazz.getName() }, cause); | |
| 40 | } | |
| 41 | | |
| 42 | /** | |
| 43 | * log the error | |
| 44 | */ | |
| 45 | @Override | |
| 46 | protected void log() | |
| 47 | { | |
| 48 | if ( log.isErrorEnabled() ) | |
| 49 | log.error(getMessage()); | |
| 50 | else | |
| 51 |
1
1. log : removed call to org/apache/empire/exceptions/EmpireException::log → NO_COVERAGE |
super.log(); |
| 52 | } | |
| 53 | | |
| 54 | | |
| 55 | } | |
Mutations | ||
| 51 |
1.1 |


| Properties' Summary |
double
ConstantErrorLow |
specifies the lower limit of the error range of a
data row.
|
double
ConstantErrorHigh |
specifies the upper limit of the error range of a
data row.
|
boolean
MeanValue |
determines if the mean value for a data row is
displayed as a line.
|
ChartErrorCategory
ErrorCategory |
[ DEPRECATED ]
determines the type of error to indicate.
|
long
ErrorBarStyle |
[ OPTIONAL ]
determines the style of the error bars. Use this instead of
ErrorCategory
|
double
PercentageError |
specifies the percentage that is used to display error bars.
|
double
ErrorMargin |
specifies the percentage for the margin of errors.
|
ChartErrorIndicatorType
ErrorIndicator |
determines how the error is indicated.
|
ChartRegressionCurveType
RegressionCurves |
determines a type of regression for the data row values.
|
string
ErrorBarRangePositive |
[ OPTIONAL ]
contains a cell range string for positve error bars. This
property is used when the ::ErrorBarCategory is set
to ::ErrorBarCategory::FROM_DATA.
|
string
ErrorBarRangeNegative |
[ OPTIONAL ]
contains a cell range string for negative error bars. This
property is used when the ::ErrorBarCategory is set
to ::ErrorBarCategory::FROM_DATA.
|
Copyright © 2013, The Apache Software Foundation, Licensed under the Apache License, Version 2.0. Apache, the Apache feather logo, Apache OpenOffice and OpenOffice.org are trademarks of The Apache Software Foundation. Other names may be trademarks of their respective owners.


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{{define "home-title"}}Home{{end}} {{define "home-body"}}
Tadue makes it easy to collect payments from your friends.
When you request a payment, Tadue will send the payer a PayPal link, pre-filled with all the payment details. For personal payments, there is no charge.
From there, Tadue will take care of sending periodic reminders and keeping track of whether you've been paid. No more awkward conversations, no more stress!
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ORFK wrote:
we could modify the buttons names and delte by all "jouer en"
or we delete only the word "en" because i think (with my basic french know-how) everybody would understand "jouer cooperation" too, at the end we should short "navigateur serveurs" and than it could work.
just my idea for a solution, but i use it in german, so i will never see it :-P
well, that sounds good, if the buttons can be modify:
-"Coopération" (even "Co-op")
-"Campagne"
-"Serveurs"
this word still perfectly understandable in french
otherwise, personally, I have no problem with option 2 by brain :)


ID4 = (SCI-FI) - SCI INDEPENDENCE DAY [SPOILER] A film review by Steve Schear Copyright 1996 Steve Schear
In short: An entertaining, if juvevile, summer Sci-Fi flic. INDEPENDENCE DAY (ID4) is full of great special effects, poor science, a few memorable one-liners and a thin plot lifted from WAR OF THE WORLDS and a two-part STAR TREK: THE NEXT GENERATION episode. ID4 will no doubt make gobs of money, but I predict will be no more memorable than the team's previous, also flawed, effort "STARGATE".
Cast in the footsteps of Irwin Allen's destruction epics, ID4 has a large cast of stereotypical characters with little for an over 25 audience to identify with. The plot is simple: Evil aliens come to conquor Earth in a mother ship 1/4th the size of the moon and dispatch a dozen or so "smaller" ships, only a 15-miles across, to lay waste to Earth's cities.
Not since George Pal's 1953 film THE WAR OF THE WORLDS has someone had the guts to offer up a decent global destruction, alien invasion, film. The special effects for showing the massive carnage were considered too expensive. Producer and director Roland Emmerich and Dean Devlin (who co-wrote the screenplay) were convinced the technology was ready and cost effective, and the results are spectacular.
However, from the start the screenwriters basic leave science behind (they obviously never took Astronomy 101). If an object the size (and assumed mass) of the Mother Ship came into Earth's proximity our world would be quickly torn apart by tidal forces. This is how the astroids were formed. No need to invade. The aliens could just harvest the debris.
As humanity's extermination begins, the characters lives are drawn together. Although it seems we don't have a chance, somehow we have to find a way to beat their superior technology. The Alien ships are huge and protected by an impenetratable shield. This is going to be really tough, in fact, its really impossible given the available time and Earth's technolgy. And therein lie the problem! ID4 would have been much better and more believable had the Aliens won the first round, destroying the Earth.
Bill Pullman plays the American President as a completly unbelievable character, an honest politition. A naive young ex-fighter pilot of the gulf war, with strong honor and ethics, he'd must have run as a self-funded independent to get elected. He's weak and nice, not at all the type to be a leader.
Given the script, the performances are very good. Will Smith plays a charming and cocky fighter pilot; Jeff Goldblum is a nebish computer nerd, with Judd Hirsch as his streotypical Jewish father; and Brent Spinner is great as a recluse xenobiologist in charge of the top-secret Area 51 base. I felt that Brent's role should have been expanded. A good cameo is given by Harry Connick, Jr. as Will's squadron mate, and beautiful Vivica Fox offers up a good love interest for Will.
The special effects are the focus of the movie. Most impressive are the destruction of New York, Los Angeles and Washington, D.C.
Trekkies should recognize ID4's plot as little more than a thin re-hash of TNG's Borg episode. The Mother ship with its reliance on central coordination is almost straight from the series, as is Goldblum's use of a computer virus to disable the Alien defenses.
The President is taken to Area 51 where Brent shows him the bodies of three Aliens and their fighter craft which crashed almost 50 years ago in the New Mexico desert. Government scientists had been studying them all this time, but couldn't figure out how they work, or even get the ship to power up. That is until the Mother ship and its coordinating signal is received. The speed, only a few hours, with which Jeff's character is able to comprehend the intracicies of an Alien technology and devise a computer virus was for me the script's last straw.
Jeff and Will volunteer to deliver a pair of nukes to the mother ship using the resurected Alien fighter. That they could fool the Mother ship's advanced communication and coordination technology into accepting into its bossom a craft missing for 50 years, made my jaw drop.
The renowned English playright Oscar Wilde must have had works like ID4 in mind when quiped that, "Nobody ever lost money underestimating the intelligence of the audience."
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
to ASCII to HTML conversion.
Related links: index of all rec.arts.movies.reviews reviews


Lecture 2
(["lists", "tuples"], "and data types")
Prelude> 4317 * 103
444651
Prelude> let x = 3.0
Prelude> let y = 4.0
Prelude> sqrt( x^2 + y^2 )
5.0
Prelude> 2^1000
10715086071862673209484250490600018105614048117055336074437503883703510511249361224931983788156958581275946729175531468251871452856923140435984577574698574803934567774824230985421074605062371141877954182153046474983581941267398767559165543946077062914571196477686542167660429831652624386837205668069376
Prelude> (+) 2 3
5
f(2, 3) = 2 + 3 = 5
Prelude> (^) 3 4
81
g(3, 4) = 3^4 = 81
Prelude> (True && False) || False
False
Prelude> True && 1
ERROR!
Prelude> 30 < 31
True
Lets define a function isHaxxor
Prelude> let isHaxxor p = if p>9000 then True else False
Prelude> isHaxxor 9001
True
Lets also define a related function isNoob
Prelude> let isNoob p = not (isHaxxor p)
Prelude> isNoob 9001
False
Reusing code is easy
The most common data type in Haskell
Prelude> [3,1,5,3]
[3,1,5,3]
Prelude> ["list","of","strings"]
["list","of","strings"]
The elements must be of the same type
Prelude> [1,2,3,"a","bb","ccc"]
ERROR!
Start at 1, end at 10
Prelude> [1..10]
[1,2,3,4,5,6,7,8,9,10]
Start at 1, count up by 0.25, end at 4
Prelude> [1, 1.25 .. 4.0]
[1.0,1.25,1.5,1.75,2.0,2.25,2.5,2.75,3.0,3.25,3.5,3.75,4.0]
Prelude> let l1 = [1,2,3]
Prelude> let l2 = [4,5,6]
Prelude> l1 ++ l2
[1,2,3,4,5,6]
Prelude> 0 : [1,2,3]
[0,1,2,3]
Prelude> let l1 = [1,2,3]
Prelude> let l2 = [4,5,6]
Prelude> (++) l1 l2
[1,2,3,4,5,6]
Prelude> (:) 0 [1,2,3]
[0,1,2,3]
In fact, a list is formally defined like this
Prelude> [1,2,3] == (:) 1 ((:) 2 ((:) 3 []))
True
Gross! We'll put that away. I'm so sorry.
A string is just a list of characters.
Prelude> "wahoo" == ['w', 'a', 'h', 'o', 'o']
True
So (++) and (:) work on strings too.
Prelude> "" == []
True
Prelude> 'a':"bc" == ['a', 'b', 'c']
True
Prelude> 6:"789" == "6789"
ERROR!
head
returns the first element of a list
tail
returns the remaining elements of a list
last
returns the last element of a list
init
returns everything but the last elementCreate a file myfunction.hs
and write a function to reverse a list
rev [] = []
rev [] = []
rev xs = (last xs):(rev (init xs))
rev [] = []
rev xs = rev (tail xs) ++ [head xs]
rev [] = []
rev (x:xs) = reverse xs ++ [x]
(clear answer)
(show answer 1)
(show answer 2)
(show answer 3)
run ghci
and load the file
Prelude> :load myfunction.hs
[1 of 1] Compiling Main ( myfunction.hs, interpreted )
Ok, modules loaded: Main.
*Main> rev "hello"
"olleh"
The Prelude package comes with many functions.
Reuse, reuse, reuse!
reverse
is already implemented for you!
GG, Haskell
Let S be a set, and p(x) be a predicate.
Mathematically, we can write the following statement.
∀x∈S, p(x)
Haskell allows a similar notation
[ x | x ← S, p x ]
← is pronounced "drawn from"
p x
is called a guard
Prelude> [ x+5 | x <- [1,2,3] ]
Prelude> [ x+5 | x <- [1,2,3] ]
[6,7,8]
(clear answer)
(show answer)
Prelude> [ x | x <- [2..10], 10 `mod` x == 0]
Prelude> [ x | x <- [2..10], 10 `mod` x == 0]
[2,5,10]
(clear answer)
(show answer)
Prelude> [ team ++ " " ++ player |
team <- ["red", "blue"],
player <- ["soldier", "pyro", "scout"] ]
Prelude> [ team ++ " " ++ player |
team <- ["red", "blue"],
player <- ["soldier", "pyro", "scout"] ]
["red soldier","red pyro","red scout","blue soldier","blue pyro","blue scout"]
(clear answer)
(show answer)
A tuple is a binding of data types
It's comma-separated, just like lists
A tuple is surrounded by ( ... )
(1, 2)
("lol", "wut")
(40, "fourty")
("Coins", [1, 5, 10, 25])
fst
retrieves the first element
Prelude> fst (1,2)
1
snd
retrieves the second element
Prelude> snd (1,2)
2
Prelude> [ (n, even n) | n <- [1..4] ]
[(1,False),(2,True),(3,False),(4,True)]
Prelude> [(a,b,c) | c<-[1..10], b<-[1..c], a<-[1..b]
, a^2 + b^2 == c^2]
[(3,4,5),(6,8,10)]
Grab one of these editors, and start hacking!
Write 2 different implementations of factorial
fac1 n = ...
fac2 n = ...
Save the file as fac.hs
and submit it here


This document describes the extension of Smalltalk with mixins. The motivation for this proposal is the desire for increased code sharing. Smalltalk has a clean and simple single inheritance semantics. However, this can sometimes result in undesirable code replication. Mixin based inheritance [BrachaCook90, Bracha92] does not introduce the complications associated with multiple inheritance . It preserves the simple semantics of Smalltalk subclassing and message lookup, while allowing a large degree of code sharing. It is therefore desirable to try and incorporate mixins into Smalltalk.
A mixin specifies a set of modifications (overrides and/or extensions) to be applied to a superclass parameter. A mixin differs from an ordinary subclass definition in that it abstracts over the identity of its superclass. Mixins may be viewed as functions that take superclasses and produce subclasses. Consider the following pseudo-code :
Point subclass ColorPoint
instance variables: red green blue
methods:
red: r green: g blue: b
hue: h saturation: s value: v
red
green
blue
hue
saturation
value
The code in ColorPoint has little to do with points. It applies to a variety of colored graphical entities. Replicating the color specific code in a variety of places is undesirable. An easy and natural way to achieve this to incorporate the code into a mixin:
Mixin Color(G) {
G subclass {
instance variables: red green blue
methods:
red: r green: g blue: b
hue: h saturation: s value: v
red
green
blue
hue
saturation
value
}
}
The mixin Color abstracts over an unspecified superclass G. Color can then be used at different points in the subclass hierarchy, by invoking it on different actual superclasses, much as one invokes a function at multiple points in a computation. This is accomplished using |>, the mixin invocation operator :
ColorPoint = Color |> Point
ColorCircle = Color |> Circle
The |> operator takes a mixin M and a class S, and produces a new class that modifies its superclass S with the code defined in M. The mixin can be applied to various superclasses to derive different classes. However, the source code of the mixin is shared among all these mixin applications, promoting modularity. The analogy between mixins and functions is useful in understanding the properties of mixins. Here are some key points:
See [BrachaCook90, Bracha92} for a more extensive discussion of mixins.
In Smalltalk, every class is itself a first class object with its own identity, and potentially with its own class and instance variables. It follows that every mixin invocation produces a distinct class, with a distinct identity, as its result. This is essential to prevent syntactically identical invocations (possibly in different libraries) accidentally sharing state with unforseen consequences.
It is often desirable to treat an existing class as a mixin. S mixin returns a mixin that contributes the definitions given locally by the class S. Consider the case of a class in a library of graphical widgets:
Widget subclass AgregateWidget{...}
Such a class groups widgets together. It is useful to think of this class a collection of widgets. However, one cannot usually inherit functionality from Collection since graphical widgets belong to a separate hierarchy. By revising the definition to
Collection mixin |> Widget subclass AgregateWidget{...}
one can reuse all of the functionality in the Collection class.
Mixins do not change the semantics of subclassing or of message lookup in Smalltalk. As a result, mixins do not influence the behavior of existing Smalltalk programs. The extension is therefore fully upward-compatible. Furthermore, mixins can easily be eliminated from a program by automatically creating a class for each mixin invocation, and duplicating the mixin's code in it.
In principle, mixins are easily implemented using Smalltalk's reflective capabilities. One can simply enclose a class constructor within a method that takes a superclass and a name as arguments. The method must also reflectively add the required methods to the new class. Of course, this solution is too awkward to be useful in practice. A usable implementation must provide programming environment support for creating and incrementally modifying mixins. Whenever a change is made to the mixin, it must be propagated to all invocations, and checked for validity. More ambitious implementations may seek to share code among a mixin's invocations.
A working implementation of mixins in Smalltalk has been constructed. Mixins have been used in the construction of real applications, and the code sharing benefits have been significant. In particular, the ability to extract mixins from existing classes has proven very valuable. Further experience is necessary, however, to to determine how extensively one should use mixins, and to establish a methodology of working with mixins.
Mixin based inheritance can easily be added to Smalltalk without changing the existing semantics of Smalltalk subclassing and method lookup. Preliminary experience with a working implementation indicates that the extension fullfills its goal of increasing code sharing, without the complications inherent in multiple inheritance.
[BrachaCook90] Gilad Bracha and William Cook. Mixin-based inheritance (postscript, 165K). In Proc. of the Joint ACM Conf. on Object-Oriented Programming, Systems, Languages and Applications and the European Conference on Object-Oriented Programming, October 1990 .
[Bracha92] Gilad Bracha, The Programming Language Jigsaw: Mixins, Modularity and Multiple Inheritance (compressed postscript, 246K).., Ph.D. dissertation, Dept. of Computer Science, University of Utah 1992.