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Snippets for yer computer needs

Markup languages

HTML

Application cache

Preloading

<link rel="prefetch" href="_url_">

Shim for old IE browsers

<!--[if lt IE 9]>
<script src="<http://html5shim.googlecode.com/svn/trunk/html5.js>"></script>
<![endif]-->

Forms

<form name="input" action="script.php" method="get">
Username: <input type="text" name="user" />
Favorite color:
<select name="color">
  <option value="red">Red</option>
  <option value="blue">Blue</option>
</select>
<input type="submit" value="Submit" />
</form>

Input attributes (HTML 5)

use required to have the browser whine

<input ... required>

Code samples

<code>print 'hello world'</code> prints <samp>hello world</samp>

Canvas (HTML 5)

<canvas id='id' height='600' width='800'>fallback</canvas>
<script type='text/javascript'>
  var canvas = document.getElementById(id)
  if (canvas.getContext) {
    var context = canvas.getContext(type)
  }
</script>

Fixed-meter bar (HTML 5)

<meter value='num' min='num' max='num' optimum='num'>
fallback display
</meter>

Progress bar (HTML 5)

<progress value='num' max='num'>
fallback display
</progress>

Use JavaScript to move it around

Autofocus input (HTML 5)

<input ... autofocus>

Patterned input (HTML 5)

<!-- Enter 15 digits -->
<input type='text' pattern='[0-9]{15}'>
<input type='text' ... list='listid'>
<datalist id='id'>
  <option label='label1' value='value1'>
  <option label='label2' value='value2'>
</datalist>

Editable content

<p contenteditable="true">

International calling code is required

<a href="tel:+14035555555">403-555-5555</a>

<!-- To handle an extension -->
<a href="tel:+14035555555p23">403-555-5555 ext. 23</a>

<!-- To use a fax line -->
<a href="fax:+14035555555">403-555-5555</a>

Doctype (HTML 5)

<!doctype html>

Semantic tags (HTML 5)

- <section>
- <nav>
- <article>
- <hgroup> (for article tag)
- <p> (In HTML 5, don't use the p tag for paragraph breaks - it *must* be used for paragraphs)
- <figure> (for article tag)
- <figcaption> (for figure tag)
- <aside> (for p tags)
<article>
  <hgroup>
 <h1>Title</h1>
 <h2>Byline</h2>
  </hgroup>
</article>

Good meta tags to have

<head>
<title>up to 70 characters of relevant text</title>
<meta name="description" content="155 characters of message matching text">
</head>

http://www.iacquire.com/blog/18-meta-tags-every-webpage-should-have-in-2013

HAML

https://haml.info

gem install haml
-# This is a comment line, !!! 5 does the HTML 5 doctype
!!! 5
%html
  %head
    %meta{charset: "utf-8"}
    -# You can pass variables to attributes
    %meta{variable: attribute_variable}
    %title Demo HAML page
  %body
    -# you can use . or # instead of %div if you're using a div tag
    #shorthand
    %div#content
    = haml :footer

Markdown

<!-- Comments are HTML comments, which can show up in the rendered output -->

[//]: # Non-standard way of commenting (avoiding rendering) is using using link to # (a valid URI) and blank line separation

[You can comment in the title box, and rely on :: to not find a reference elsewhere on the page (multiline support not guaranteed)]::

<!-- atx headers -->
# Heading 1
## Heading 2
###### Heading 6

<!-- Emphasis -->
*This text will be italic*
_This will also be italic_
**This text will be bold**
__This will also be bold__
_You **can** combine them_
~~This line is using a strikethrough~~
\*Use backslash for literals\*

<!-- Links -->

<http://example.com> - automatic link
[Example](<http://example.com>)
[DefineLink][]
[DefineLink]: http://example.com/later

<!-- Images -->
![Alt text](/path/to/img.jpg)

<!-- Lists -->
- unordered
- list

1. ordered
2. list

1.  Multiparagraph list

    Requires 4 spaces/tab

2.  Blockquoted items

    > Need to have the > indented as well

Symbols and glyphs

Accents

Modifier e.g. HTML Entity vim CK
Grave à à a!
Acute á á a’
Circumflex â â a>
Tilde ã ã ’?
Umlaut ä ä a:
Cedil ç ç c,

Set theory

desc notation unicode vim CK
empty set \varnothing 8709 /0
set of natural numbers \mathbb{N}    
set of integers \mathbb{Z}    
set of rational numbers \mathbb{Q}    
set of algebraic numbers \mathbb{A}    
set of real numbers \mathbb{R}    
set of complex numbers \mathbb{C}    
is member of \in 8712 (-
is not member of \notin 8716  
contains as member \ni 8715 -)
is proper subset of \subset 8834 (C
is subset or equal to \subseteq 8838 (_
is proper superset of \supset 8835 )C
is superset or equal to \supseteq 8839 )_
set union \cup 8746 )U
set intersection \cap 8745 (U

xml

Prettify

tidy -xml -i -m [file]

XMLLint

# Check XML file is well-formed
xmllint --noout $FILE

# Check XML file against local DTD file
xmllint --noout --dtdvalid ./local.dtd $FILE

LaTeX

adding quotes

\begin{quote}
...
\end{quote}

Cheatsheet

\documentclass{book}
\begin{document}
\maketitle
\end{document}

bibtex

% Add to the preamble:
% Load biblatex package
\usepackage{biblatex}
% Load bibTeX file
\addbibresource{file.bib}
% Add a citation somewhere in your file
Blah blah \autocite{<key>}
% In the backmatter,
\printbibliography

document classes

ePub

installing on Fedora

Add a draft watermark

\usepackage{draftwatermark}
\SetWatermarkText{Draft}

Tables

\begin{tabular}{||c || c | c ||}
\hline
Foo? & Column A & Column B
\hline
Bar & Yes & No
\hline
Bax & No & Yes
\hline
\end{tabular}

mustache

Characters escaped with standard double Mustache syntax: & \ " < > '

tag desc
{{name}} search a label in current context (HTML-escaped by default)
{{{name}}} unescaped variable
{{#names}} begin section for names (1 or more)
{{^names}} begin section for names (false or empty array)
{{/names}} end of a section
{{! comment}} comment
{{> partial}} partial (rendered at runtime)
{{=<% %>=}} set delimiters to something else (here erb delimiters)

If value is callable (ie function or lambda), text block is passed to callable unrendered and unexpanded.

http://mustache.github.io/mustache.5.html

CSS

http://www.cssbuttongenerator.com/

Flexbox

#thing {
  display: flex;
  justify-content: flex-start; /* horizontal alignment */
  align-items: flex-end; /* horizontal alignment */
  align-content: flex-end; /* determine spacing between the lines */
  order: 1; /* adjust the order */
  flex-wrap: wrap;
  flex-direction: row; /* direction of items - this flips justify-content and align-items */

  /* you can also use flex-flow instead of -wrap and -direction */
  flex-flow: row wrap;
}

.item {
  align-self: flex-end; /* move an item */
}

Media types

Mobile browsers

<link rel='stylesheet' media='all' href='base.css'
<link rel='stylesheet' media='screen and (max-width: 320px)' href='mobile.css'>

Use a custom font (CSS3)

@font-face {
      font-family: MyFont;
      src: url(myfont.ttf), url(myfont.eot);
}
selector { font-family: MyFont; }

Rounded corners (CSS3)

border: width style color;
border-radius: radius;

Box shadow (CSS 3)

box-shadow: xpos ypos blur spread color, ...;

Change an element’s background image (CSS 3)

selector {
  background-image: url(imagefile), ...;
}

Translucent elements (CSS 3)

selector {
  opacity: value;
  filter: alpha(opacity=value);
}

Center an element

Give it a width and set the margin

margin: 0 auto;
width: 939px;

Create custom borders (CSS 3)

border-image: source slice repeat;
border-width: width;

Resources

Defaults for getting feed link:

# Wordpress
http://wp.example.org/feed

# Blogger / blogspot
Atom 1.0: https://blogname.blogspot.com/feeds/posts/default
RSS 2.0: https://blogname.blogspot.com/feeds/posts/default?alt=rss

reStructuredText

Syntax cheatsheet:

*italics*
**bold**
``fixed-space literal``
.. comment
# Convert rst to HTML
rst2html FILE ...

Liquid templating system

https://shopify.github.io/liquid/

EPUB files

http://code.google.com/p/epubcheck/

zip -X ../spm.epub mimetype css/style.css META-INF/container.xml book.ncx book.opf solplayaymar.xhtml

ASN.1 (Abstract Syntax Notation One)

https://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One

Visually similar to Augmented Backus-Naur form, but is for data structures, not syntax.

SAML

Security Assertion Markup Language https://samltest.id/

EmotionML

https://www.w3.org/TR/emotionml/Overview.html

GeoJSON

https://en.wikipedia.org/wiki/GeoJSON

Virtual Human Markup Language

https://en.wikipedia.org/wiki/VHML