# Given symlink, target, replace it with a symlink the the directory, source
# Tested only with directories, not sure how this would work for files
# s - symbolic link
# f - if the target exists, unlink it
# h - do not follow target symlink, required for replacing a directory symlink
ln -sfh source target

bash

1

Replace directory symlink

# Given symlink, target, replace it with a symlink the the directory, source
# Tested only with directories, not sure how this would work for files
# s - symbolic link
# f - if the target exists, unlink it
# h - do not follow target symlink, required for replacing a directory symlink
ln -sfh source target

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• bash, 
• ln, 
• symlink

# image.iso: Output image file
# Source/: Directory from which the image is built
hdiutil makehybrid -o image.iso Source/

bash

1

Crate a *NIX-friendly disk image on Mac OS X

# image.iso: Output image file
# Source/: Directory from which the image is built
hdiutil makehybrid -o image.iso Source/

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• linux, 
• osx

 <meta http-equiv="X-UA-Compatible" content="chrome=1">

html+php

1

ChromeFrame toggle

 <meta http-equiv="X-UA-Compatible" content="chrome=1">

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• chrome, 
• ie

xquery version "1.0-ml";
declare namespace x = "http://www.w3.org/1999/xhtml";

(: CAUTION: This will be slow for even moderately sized data sets. :)

let $MAX := 650
return
<x:table style="width: 100%;">
<x:tr><x:th>#</x:th><x:th>Name</x:th><x:th>Document Occurrences</x:th></x:tr>
{
for $name at $i in distinct-values((//element()/local-name(.)))
let $ct :=
count(
  distinct-values(
    xdmp:value(
      concat("//*[local-name(.)='",$name,"']/xdmp:node-uri(.)")
    )
  )
)
order by $ct descending
return 
  <x:tr style="border-bottom: solid 1px black;"><x:td>{$i}</x:td><x:td>{$name}</x:td><x:td><x:div style="width: {floor(xs:float($ct div $MAX) * 320)}; background-color: #ccc;">{$ct}</x:div></x:td></x:tr>
}</x:table>

xml

1

Frequency of local names in a database

xquery version "1.0-ml";
declare namespace x = "http://www.w3.org/1999/xhtml";

(: CAUTION: This will be slow for even moderately sized data sets. :)

let $MAX := 650
return
<x:table style="width: 100%;">
<x:tr><x:th>#</x:th><x:th>Name</x:th><x:th>Document Occurrences</x:th></x:tr>
{
for $name at $i in distinct-values((//element()/local-name(.)))
let $ct :=
count(
  distinct-values(
    xdmp:value(
      concat("//*[local-name(.)='",$name,"']/xdmp:node-uri(.)")
    )
  )
)
order by $ct descending
return 
  <x:tr style="border-bottom: solid 1px black;"><x:td>{$i}</x:td><x:td>{$name}</x:td><x:td><x:div style="width: {floor(xs:float($ct div $MAX) * 320)}; background-color: #ccc;">{$ct}</x:div></x:td></x:tr>
}</x:table>

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• marklogic, 
• xml, 
• xquery

# PUTs a document to a WebDAV server 
curl --digest -u user:pass -H "Content-Type:application/xml" -T local_file.xml http://hostname:9999/remote_location.xml

bash

1

PUTting a file via WebDAV

# PUTs a document to a WebDAV server 
curl --digest -u user:pass -H "Content-Type:application/xml" -T local_file.xml http://hostname:9999/remote_location.xml

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• curl, 
• http, 
• marklogic, 
• webdav

# Forwards local traffic on port 2222 to the remote appserver host on port 9999.
# e.g. http://localhost:2222
ssh -N -p 22 user@sshserver -L 2222/appserver/9999

bash

1

SSH Tunnel

# Forwards local traffic on port 2222 to the remote appserver host on port 9999.
# e.g. http://localhost:2222
ssh -N -p 22 user@sshserver -L 2222/appserver/9999

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• ssh

background: rgba(0,0,0,0.2); /* R, G, B, Alpha */ 


		
/* IE 7 */
background:url("blah.png"); /* I’m not sure why this is necessary */
/* Hack the gradient filter to get the same effect. */ 
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#33000000,endColorstr=#33000000); /*AARRGGBB: 00 - FF => 0 - 1, scale accordingly*/
zoom: 1; /* hasLayout */

css

1

CSS background transparency

background: rgba(0,0,0,0.2); /* R, G, B, Alpha */ 


		
/* IE 7 */
background:url("blah.png"); /* I’m not sure why this is necessary */
/* Hack the gradient filter to get the same effect. */ 
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#33000000,endColorstr=#33000000); /*AARRGGBB: 00 - FF => 0 - 1, scale accordingly*/
zoom: 1; /* hasLayout */

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• css, 
• ie

border-radius: 0.8em;
-webkit-border-radius: 0.8em;
-moz-border-radius: 0.8em;

css

1

CSS border radius

border-radius: 0.8em;
-webkit-border-radius: 0.8em;
-moz-border-radius: 0.8em;

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• css

<!--[if IE 6]>
Special instructions for IE 6 here
<![endif]-->

[if lte IE 6]
[if true]

html

1

IE conditional comment

<!--[if IE 6]>
Special instructions for IE 6 here
<![endif]-->

[if lte IE 6]
[if true]

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• ie

<audio src="/audio/BrokenBeatScarred.mp3" controls><a href="/audio/BrokenBeatScarred.mp3">Download song</a></audio>

html

1

Embed audio HTML5 style

<audio src="/audio/BrokenBeatScarred.mp3" controls><a href="/audio/BrokenBeatScarred.mp3">Download song</a></audio>

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• audio, 
• html5