explain xkcd - User contributions [en]

Talk:1779: 2017

2016-12-31T15:52:54Z

Magras:

Well, we're ending the year off with an optimistic XKCD comic. Here's to another year!
[[User:GranadalandDreamer|GranadalandDreamer]] ([[User talk:GranadalandDreamer|talk]]) 23:07, 30 December 2016 (UTC)

What is five thirty eight? From the context I get it's most likely a TV-Show, but I believe some background information would help here. --[[Special:Contributions/162.158.92.46|162.158.92.46]] 07:14, 31 December 2016 (UTC)
:It's a website. You can click on the link to get more information about it as it links to FiveThirtyEight's Wikipedia article. --[[Special:Contributions/162.158.75.160|162.158.75.160]] 10:00, 31 December 2016 (UTC)

Title text also can be reference to Seveneves by Neal Stephenson. [[User:Magras|Magras]] ([[User talk:Magras|talk]]) 15:52, 31 December 2016 (UTC)

1636: XKCD Stack

2016-01-29T17:17:38Z

Magras: harry potter reference

{{comic
| number = 1636
| date = January 29, 2016
| title = XKCD Stack
| image = xkcd_stack.png
| titletext = This site requires Sun Java 6.0.0.1 (32-bit) or higher. You have Macromedia Java 7.3.8.1¾ (48-bit). Click here [link to java.com main page] to download an installer which will run fine but not really change anything.
}}

==Explanation==
{{incomplete|Needs more detail. The table is great but should be corrected to not refer to a persons view or feelings. ''I think'' phrases are used more than once at the moment.}}

In software engineering, a tech stack is the set of technology platforms and tools that a company or app uses. A common tech stack is LAMP, composed of a Linux operating system, an Apache web server, a MySQL database, and the PHP programming language. In this comic, the XKCD stack is introduced. The technologies comprising it are either non-existent, unreliable, or outdated.

===Explanation of steps===
{| class="wikitable"
| | Layer
| | Explanation
|-
| |
EBNF/CSS
| |
BNF or {{w|Backus–Naur Form}} is a syntax used for describing {{w|context-free grammars}}.
{{w|Extended Backus–Naur Form|EBNF}} is "Extended BNF", it is the same thing as BNF with a few more syntactic constructs intended to ease its use in the most common cases.
CSS or {{w|Cascading Style Sheets}} are a language used to describe what a web page should look like. Web pages are usually written in {{w|HTML}}, which describes the ''structure'' of the page (i.e. divides the document into paragraphs, lists, etc.) complemented with CSS which describes the ''look and feel'' of the page (colors, fonts, margins, etc.). EBNF/CSS would suggest CSS with strange syntax.
|-
| |
Broken Java Applet
| |
In recent years it has become more difficult to run {{w|Java (programming language)|Java}} {{w|Applet|applets}} in several browsers. {{w|Google Chrome|Chrome}} 45 stopped supporting {{w|NPAPI}}, {{w|Mozilla Firefox|Firefox}} will drop support by 2016 and {{w|Microsoft Edge|Edge}} do not support NPAPI plugins at all. Furthermore, two days before this comic was published {{w|Oracle Corporation|Oracle}} (the developer of Java) announced plans to officially end support of Java applets in an upcoming version.
|-
| |
Archive.org Mirror
| |
{{w|Internet Archive|Archive.org}} is a website which archives websites, and created the {{w|Wayback Machine}}. An Archive.org mirror would be a duplicate of a website on Archive.org's servers. As Archive.org attempts to mirror the whole Internet, Archive.org's mirror would be rather big. Moreover, the backup of Archive.org should not back up Archive.org itself or, otherwise, create an infinite backup loop.

|-
| |
Hypercard.js
| |
{{w|HyperCard}} can be considered as a kind of predecessor for the world wide web developed at {{w|Apple Inc.|Apple}}. The file extension .js indicates that is was rewritten in {{w|JavaScript}}. A similar reference to JavaScript is found in [[1508: Operating Systems]]. The .js extension also refers to node.js, where most library names end in .js
|-
| |
QBasic on Rails
| |
A mix between {{w|QBasic}} and {{w|Ruby on Rails}}. QBasic was programming language on first PCs, known for spaghetti code. {{w|Ruby (programming language)|Ruby}} is a rather modern language, often used with Ruby on Rails web application framework. QBasic on Rails would likely mean rewrite of Ruby on Rails from Ruby to QBasic. QBasic no longer runs on modern computers, however a free {{w|open source}} rewrite of QBasic, called [http://www.qb64.net/ QB64], is available for Windows, Linux, Mac, and Android. There also exists a webserver on BASIC called [http://www.runbasic.com/ RunBasic].

|-
| |
[Blocked by AdBlocker]
| |
{{w|Ad blocking}} software are extensions to browsers that try to remove ads from web pages, so the user is not distracted by them. [[624: Branding]] shows what "browsing without adblock" looks like. The joke is that AdBlocker is preventing us from seeing what makes up this portion of the stack.
|-
| |
MongoDB/Excel
| |
{{w|MongoDB}} is a modern {{w|NoSQL}} {{w|Database|database}} system, {{w|Microsoft Excel}} is a {{w|Spreadsheet|spreadsheet}} program from Microsoft, which is sometimes misused as a database system.

|-
| |
Some piece that works so nobody asks any questions
| |
Writing any non-trivial piece of software always require a phase of {{w|debugging}}, which consists in finding and fixing {{w|Software bug|bugs}}. With complex software, this is a long and tiring process, so when the product is finally finished no one dares to modify it any further for fear that it will fail in unexpected ways. After some time passes, it is even worse because nobody really remembers how the software was ''supposed'' to work, so the product becomes some kind of godlike treasure which must be treated with the utmost respect and reverence because, you know, if it stops working we're all doomed.
|-
| |
Triply-Nested Docker
| |
{{w|Docker (software)|Docker}} allows complete operating system to run under different operating system (with some performance penalty). Triply-nested docker would mean operating system A running under operating system B running under operating system C. That would likely be a performance and management nightmare
|-
| |
Paravirtual Boy®
| |
This is a reference to the {{w|Virtual Boy}}, a failed portable console created by {{w|Nintendo}}. {{w|Paravirtualization}} is a common buzzword in the virtualization community these days. "Virtual X" means simulated X. "Paravirtual X" means X is simulated, but is aware of simulation and cooperating, for faster performance. I hope the triply-nested Docker above runs paravirtualized.
|-
| |
A dev typing real fast
| |
A dev is a {{w|Software developer|software developer}}. This is possibly a reference to [[341: 1337: Part 1]], where [[Mrs. Roberts]] edits the {{w|Transmission Control Protocol|TCP}} stream live while wearing oven mitts and baking cookies. Such a feat would require real fast typing. It looks like xkcd webserver is not a computer after all -- we have a person manually replying to HTTP protocol queries. I guess she's busy.

|-
| |
Older version of our software
| |
People are often reluctant to switch to newer versions of software because, even though newer versions are supposed to have more features and fewer bugs, they end up confusing users. Users of older versions are used to do everything with less features and circumventing old bugs. They don't know how to use the new features, which of course come with new bugs they haven't learned how to circumvent yet. It is also often the case that newer versions remove weird unused old features, breaking the workflow of users who actually did use such features and are left without a suitable replacement.
|-
| |
Mystery Networking Horror
| |
Randall suggests here that the whole networking stuff behind the XKCD service is both mysterious (no one actually knows the details) and horrific (technically questionable architecture and implementation, or somehow tentacled and eldritch in nature).
|-
| |
Microsoft Bob Server®
| |
{{w|Microsoft Bob}} was a short-lived, failed attempt by Microsoft, around 1995, to provide a user-friendly interface for the {{w|Microsoft Windows|Windows}} 3.1x, Windows 95 and Windows NT operating systems. It consisted of a virtual "house" and "rooms", and the idea was that you could click on a pen and open the word processor. It was heavily criticized and was soon discontinued. Randall seems to be making the suggestion the Bob has continued to be developed and now there's a Bob Server, similarly to Windows server.
|-
| |
A giant {{w|Central processing unit|CPU}} someone built in Minecraft
| |
{{w|Minecraft}} is a popular sandbox game where you place blocks to build things. Since the introduction of Redstone objects (materials used to create basic electric circuits within the game) people have made many machines within Minecraft, including calculators and clocks. The most complex of these machines simulate simple computers, capable of storing several lines of code and performing basic mathematical operations such as division, which requires thousands of blocks and extremely complex designs.
|}

The title text contains several jokes about the Java programming language:

* First, it refers to Java both as {{w|Sun Microsystems|Sun}} Java and {{w|Macromedia}} Java. This is a pun on the fact that older documents refer to "Sun Java" where newer documents refer to "{{w|Oracle Corporation|Oracle}} Java", as if there were two different languages. The fact is that Java was designed originally by Sun and then bought by Oracle, so it "changed name" even though the language is the same. Macromedia was the company that developed Flash before it was bought by Adobe. Both Flash and Java were popular in the early WWW to have interactive web pages, but both are being deprecated in favor of JavaScript.

* Second, the version numbers: older software products used to have two version numbers: major and minor (e.g. in {{w|MS-DOS}} 6.22 the major number is 6 and the minor is 22). Newer products tend to have hundreds of minor revisions, all of them numbered, so a typical user may well find themself updating version 6.0.0.1 to 7.3.8.1 without knowing at all the differences between both versions or which other versions are in between. The ¾ in the Macromedia Java version is a joke on complex version numbers, which (so far) have never included fractions. It also can be reference to [http://harrypotter.wikia.com/wiki/Platform_Nine_and_Three-Quarters platform 9 ¾].

* Third, the 32-bit or 48-bit version: The {{w|Intel 80386}} processor used an architecture known as {{w|IA-32}}, which implies the data bus is 32-bit wide and thus able to handle up to 4{{w|Gibibyte|GiB}} of {{w|Random-access memory|RAM}} memory. This was plenty for the early 1990s, when a typical home PC would have about 8MiB (this is 512 times less than 4GiB). However, about 10 years after that, a typical home PC could well use more than 4GiB of RAM, so several 64-bit architectures were created. These architectures are not compatible, so programs (including the Java Runtime Environment, or JRE) often have 32-bit and 64-bit versions. Furthermore, the JRE is heavily used by many web browsers, and for this to work the JRE and browser need to be the same "number of bits". This means that most people have installed both versions of the JRE to be able to use it with both 32-bit and 64-bit browsers. There's no 48-bit architecture (though some 64-bit processors including the {{w|x86-64|most common ones}} don't actually USE all 64 bits everywhere, ignoring some bits so actual virtual or physical memory is smaller (in case of most common one, 48bits virtual and 40bits physical), they simulate a full 64-bit environment to allow adding more bits later, so there are no specific 48-bit applications).

* Fourth, an application trying to let the user install a new version of the JRE should direct the user to the download page in the [http://java.com/ java.com site], not to the main page which deals with lots of issues with java and is not particularly helpful when trying to update the JRE.

* Fifth, and continuing with the joke of users updating 6.0.0.1 to 7.3.8.1¾ and not knowing why they should, the new version is said to "run fine but not really change anything". This is the usual behavior for Java updates: they run fine (possibly in opposition to [[1197: All Adobe Updates]], where updating must be done several times and the user is never sure they have installed all the newest updates), but after finished updating the user can't see any difference with the previous behavior, and/or may still be told that an update is required. Considering that 7.3.8.1¾ is bigger number than 6.0.0.1, it can also refer to the fact that the test for upgrading is incorrect and 7.3.8.1¾ is actually newer version.

==Transcript==

:Introducing

:The XKCD Stack
:{| class="wikitable"
| |
EBNF/CSS
|-
| |
Broken Java Applet
|-
| |
Archive.org Mirror
|-
| |
Hypercard.js
|-
| |
QBasic on Rails
|-
| |
[Blocked by AdBlocker]
|-
| |
MongoDB/Excel
|-
| |
Some piece that works so nobody asks any questions
|-
| |
Triply-Nested Docker
|-
| |
Paravirtual Boy®
|-
| |
A dev typing real fast
|-
| |
Older version of our software
|-
| |
Mystery Networking Horror
|-
| |
Microsoft Bob Server®
|-
| |
A giant CPU someone built in Minecraft
|}

{{comic discussion}}

[[Category:Computers]]
[[Category:Programming]]
[[Category:Video games]]

1561: Water Phase Diagram

2015-08-07T15:15:55Z

Magras: joke around roman number & acronym

{{comic
| number = 1561
| date = August 7, 2015
| title = Water Phase Diagram
| image = water_phase_diagram.png
| titletext = Vanilla Ice was produced in small quantities for years, but it wasn't until the 90s that experimenters collaborated to produce a sample that could survive at room temperature for several months.
}}

==Explanation==
{{incomplete| Ethion of scientific detail required.}}

This is a modified version of the {{w|phase diagram}} for water. A "phase diagram" is a chart that shows the states, or "phases", that a substance will be in under various temperatures and pressures. Water's phases are particularly well-studied; on a [http://ergodic.ugr.es/termo/lecciones/water1.html real phase diagram for water], there are a great many phases listed.

Most people are familiar with three phases of water—solid, liquid, and gas—and with the fact that an increase in temperature will cause water to change from one state to another. The gas and liquid phases ("water vapor" and "liquid water") are quite straightforward; however, there is in fact not one single solid phase of water ("ice"), but a variety of numbered phases ("ice I" through "ice XV" are currently recognized), several of which are divided into sub-categories. Ordinary, everyday ice is known as "{{w|Ice Ih|ice Ih}}" ("ice one-h"). Most of the more unusual forms of ice only form under very high pressures.

Randall's phase diagram starts out realistically, though slightly simplified in several ways. For one, it simply uses the name "ice" for the usual form(s). It is focused in on a narrower area than the more complete diagram linked earlier; on that version, the "ice V" region is quite small, and "ice III" is barely visible, whereas both are quite plain to see on Randall's diagram. Lastly, Randall has the pressure scale increase downwards (which facilitates the David Bowie/Queen entry being "under" pressure), where most phase diagrams have pressure increase upwards.

As the diagram continues downwards and the pressure increases, the jokes begin. Beyond the moderately high-pressure forms of ice (ice II, III and V), a real phase diagram has ice VI; Randall has "{{w|Vanilla Ice}}" (the name of a white rap/hip-hop artist from the 1990s). Vanilla Ice's biggest hit, "{{w|Ice Ice Baby}}", used samples from the earlier song "{{w|Under Pressure}}", by {{w|David Bowie}} and {{w|Queen (band)|Queen}}; accordingly, on Randall's diagram, the "Vanilla Ice" region transitions to "David Bowie & Queen" when it is under (even higher) pressure.

Further references to "Ice Ice Baby" are found in the title text. Near the beginning of the song, Vanilla Ice raps the line, "All right stop, collaborate and listen". The unusual choice of "collaborate" in this line has made it memorable, and the word is used in the title text (in a more typical context). The phrase "survive at room temperature for several months" is likely a reference to "Ice Ice Baby" being Vanilla Ice's only major hit, humorously suggesting he faded out of the public view after a few months of fame. Finally, even the word "sample" may be deliberately chosen as a reference to the sampling of "Under Pressure".

Roman number four (VI) can be interpreted as acronym for Vanilla Ice.

Lastly, another image is faintly visible just below and to the right of the "Water Vapor" label. It appears to be a copy of an actual phase diagram for water [https://commons.wikimedia.org/wiki/File:Phase_diagram_of_water.svg from Wikipedia]. It is unclear why this image is present in the picture; it may be some sort of hidden message, or perhaps an error.

===Related comics===
Randall has referenced "Ice Ice Baby" and "Under Pressure", separately and together, on many previous occasions, notably in [[159: Boombox]].

The [[what if?]] that was current at the time of this comic's publication was [http://what-if.xkcd.com/138/ 138: Jupiter Submarine], which began with an even more fanciful phase diagram: that of a submarine.
It also contains a reference to the songs "Under Pressure" and "Ice Ice Baby" in one figure.

The title text of [[1434: Where Do Birds Go]] whimsically suggests another possible phase of water/ice.

==Transcript==
:[A phase diagram is shown with eight labeled regions]

:[The horizontal axis, increasing in value to the the right is labeled:]
:Temperature

:[The vertical axis, increasing in value downwards is labeled:]
:Pressure

:[Region alongside the "Pressure" axis covering about half of its length is labeled:]
:Ice

:[Region spanning top-right corner of graph, i.e. higher temperatures and lower pressures. Below and to the right of the label there seems to be an insert of a small picture of the real phase diagram. The region is labeled:]
:Water vapor

:[Region below "Water vapor" and to the right of "Ice" is labeled:]
:Liquid water

:[Three small regions below "Ice" are going from left to right on the same pressure region, the last ending just under "Liquid water". They are each labeled:]
:Ice II
:Ice III
:Ice V

:[Region below "Ice II", "Ice III", "Ice V" and "Liquid water" is labeled:]
:Vanilla Ice
:(Ice VI)

:[Below "Vanilla Ice" there is a dashed line with two arrows pointing downwards. The region below the dashed line is labeled:]
:David Bowie & Queen

{{comic discussion}}

[[Category: Charts]]