Update.

bash.md

@@ -109,7 +109,7 @@ Ifs
 
 ### Numeric comparisons
 
-    if $(( $a < $b ))
+    if (( $a < $b ))
 
 ### Unset variables
 
@@ -131,13 +131,13 @@ Numeric calculations
 Arrays
 ------
 
+    # Declaring using declare -a
+    declare -a Fruits=('Apple' 'Banana' 'Orange')
+
     Fruits[0]="Apple"
     Fruits[1]="Banana"
     Fruits[2]="Orange"
 
-    # Declaring using declare -a
-    declare -a Fruits=('Apple' 'Banana' 'Orange')
-
     echo ${Fruits[0]}           # Element #0
     echo ${Fruits[@]}           # All elements, space-separated
     echo ${#Fruits[@]}          # Number of elements

css.md

@@ -105,3 +105,20 @@ Webkit extensions
     a:focus {
       outline:0; // Firefox (remove border on link click)
     }
+
+Browser hacks
+-------------
+
+Not recommended, but here they are if you ever need them. Note that vendor 
+prefixes may go away eventually.
+
+### Mozilla-only
+
+    @-moz-document url-prefix() {
+      .box { color: blue; }
+    }
+
+### Webkit-only
+
+    @media all and (-webkit-min-device-pixel-ratio: 1) {
+    }

ec2.md

@@ -6,6 +6,19 @@ title: EC2 API tools
     $ sudo apt-get install ec2-api-tools ec2-ami-tools
     $ brew install ec2-api-tools ec2-ami-tools
 
+### Pem files
+
+    $ brew info ec2-api-tools
+
+ * Before you can use these tools you must export some variables to your $SHELL
+   and download your X.509 certificate and private key from Amazon Web Services.
+
+ * Your certificate and private key are available at
+   [aws-portal.amazon.com](http://aws-portal.amazon.com/gp/aws/developer/account/index.html?action=access-key).
+
+ * Download two `.pem` files, one starting with `pk-`, and one starting with `cert-`.
+   You need to put both into a folder in your home directory, `~/.ec2`.
+
 ### Key pair
 
     # To use public images (AMI's), you need an SSH keypair from EC2.

firefox.md

@@ -0,0 +1,133 @@
+title: Firefox
+----
+
+### Firefox 18 (Jan 2013)
+
+ * Faster JS compiler (IonMonkey)
+ * Mac retina support
+ * JS `window.devicePixelRatio`
+ * JS unprefixed `ontouchstart`
+
+### Firefox 17 (Nov 2012)
+
+ * No more support for Mac OSX 10.5 and below
+ * SVG `FillPaint` and `StrokePaint`
+ * HTML `<iframe sandbox=...>` ([docs][iframe-sandbox])
+
+[iframe-sandbox]: https://developer.mozilla.org/en-US/docs/HTML/Element/iframe#attr-sandbox
+
+### Firefox 16 (Oct 2012)
+
+ * Web app support ([docs][webapp])
+ * Unprefixed CSS animations, transitions, transforms, gradients
+
+[webapp]: https://developer.mozilla.org/en-US/docs/Apps/Getting_Started
+
+### Firefox 15 (Aug 2012)
+
+ * Background updates
+ * SPDY v3
+ * Opus audio codec
+ * HTML `<audio played>` (and `<video>`)
+ * HTML `<source media=...>`
+
+### Firefox 14 (Jul 2012)
+
+ * Full screen support for OSX Lion
+ * JS pointer lock API ([docs][lock])
+ * JS display sleep API ([docs][sleep])
+
+[lock]: https://developer.mozilla.org/en-US/docs/API/Pointer_Lock_API
+[sleep]: https://bugzilla.mozilla.org/show_bug.cgi?id=697132
+
+### Firefox 13 (Jun 2012)
+
+ * Smooth scrolling by default
+ * SPDY on by default
+ * CSS `column-fill` ([docs][cf])
+ * ECMA 6 `Map` and `Set`
+ * CSS `background-position` extended syntax
+ * CSS `:invalid`
+ * CSS turn unit (`rotate(0.5turn)`)
+
+
+[cf]: https://developer.mozilla.org/en/CSS/column-fill
+
+### Firefox 12 (Apr 2012)
+
+ * CSS `text-align-last` ([docs][tal])
+
+[tal]: https://developer.mozilla.org/en/CSS/text-align-last
+
+### Firefox 11 (Mar 2012)
+
+ * `element.outerHTML` ([docs][outer])
+ * Dev tools: Style editor, 3D page inspector ([docs][tools])
+ * Unprefixed web sockets
+ * CSS `text-size-adjust` ([docs][tsa])
+
+[outer]: https://developer.mozilla.org/en-US/docs/DOM/element.outerHTML
+[tools]: https://hacks.mozilla.org/2011/12/new-developer-tools-in-firefox-11-aurora/
+[tsa]: https://developer.mozilla.org/en-US/docs/CSS/text-size-adjust
+
+### Firefox 10 (Jan 2012)
+
+ * CSS 3D transforms
+ * HTML `<bdi>` element
+ * JS fullscreen API ([docs][fs])
+ * IndexedDB APIs
+ * Dev tools: CSS Style inspector
+
+[fs]: https://wiki.mozilla.org/Platform/Features/Full_Screen_APIs
+
+### Firefox 9 (Dec 2011)
+
+ * Two-finger swipe in Mac OSX Lion
+ * CSS `font-stretch`
+ * CSS improved `text-overflow`
+ * JS `navigator.doNotTrack`
+
+### Firefox 8 (Nov 2011)
+
+### Firefox 7 (Sep 2011)
+
+  * CSS `text-overflow: ellipsis`
+  * Hidden `http://` prefix in address bar
+
+### Firefox 6 (Aug 2011)
+
+  * JS `window.matchMedia`
+  * Websockets (!)
+  * JS EvetnSource / server-sent events
+
+### Firefox 5 (Jun 2011)
+
+  * CSS animations
+  * Background tab `setTimeout` and `setInterval` clamped to 1000ms
+
+### Firefox 4 (Mar 2011)
+
+  * Do Not Track (DNT) header
+  * New JS endinge (JagerMonkey)
+  * Hardware-accelerated rendering
+  * WebM video
+  * OpenType ligatures/kerning/font variants
+  * CSS transitions partial support
+  * JS audio data API
+  * JS `mozRequestAnimationFrame`
+  * HTML5 forms API
+  * `<video buffered>`
+  * HTML5 history API
+  * New HTML5 parser
+  * ...
+
+### Firefox 3.6 (Jan 2010)
+
+  * CSS gradients
+  * CSS pointer events
+  * HTML drag & drop API
+  * HTML `<script async>`
+
+### Reference
+
+ * [Firefox releases](https://www.mozilla.org/en-US/firefox/releases/)

fitness.md

@@ -55,3 +55,11 @@ http://www.exrx.net/Nutrition/Substrates.html
 
 https://www.facebook.com/permalink.php?story_fbid=273265046115238&id=116211138487297&comment_id=1262284&offset=0&total_comments=34
 
+### Conditioning with 5/3/1
+
+ - "For conditioning, I highly recommend 30-40 minutes of walking every day.  
+ Yes,  walking. If you’re asking why something so non-strenuous: if physique 
+ goals are your only concern, do not let the conditioning take away from your 
+ recovery."
+
+Jim Wendler: http://www.jimwendler.com/2012/09/531-and-bodybuilding/

imagemagick.md

@@ -0,0 +1,16 @@
+
+### Resize to fit
+
+    convert input.jpg -resize 80x80^ -gravity center -extent 80x80 icon.png
+
+### Convert all images to another format
+
+    mogrify -format jpg -quality 85 *.png
+
+### Make a pdf
+
+    convert *.jpg hello.pdf
+
+### References
+
+  * http://www.noah.org/wiki/ImageMagick

minitest.md

@@ -0,0 +1,37 @@
+title: Minitest
+---
+
+### Usage
+
+    require 'minitest/autorun'
+
+    describe "X" do
+      it "should work" do
+        assert true
+      end
+    end
+
+### Specs
+
+    a.must_equal b
+    3.must_be_close_to 2.99999
+
+    collection.must_include needle
+    collection.must_be_empty
+
+    .must_be_kind_of
+    .must_match
+    a.must_be :<=, 42
+    obj.must_respond_to msg
+    a.must_be_same_as b
+
+    proc { ... }.must_output out_or_nil [, err]
+    proc { ... }.must_raise exception
+    proc { ... }.must_throw sym
+
+Wont is the inverse of must:
+
+    a.must_equal b
+    a.wont_equal b
+
+

osx.md

@@ -1,19 +1,16 @@
-Locations of startup items
---------------------------
+### Locations of startup items
 
     /System/Library/LaunchAgents/
     /System/Library/LaunchDaemons/
     /Library/LaunchAgents/
     /Library/LaunchDaemons/
 
-Hide desktop icons
-------------------
+### Hide desktop icons
 
     defaults write com.apple.finder CreateDesktop -bool false
     killall Finder
 
-Auto-hide other windows on dock switch
---------------------------------------
+### Auto-hide other windows on dock switch
 
     defaults write com.apple.dock single-app -bool TRUE
     killall Dock
@@ -21,8 +18,12 @@ Auto-hide other windows on dock switch
     defaults delete com.apple.dock single-app
     killall Dock
 
-Flush DNS
----------
+### Flush DNS
 
-    dscacheutil -flushcache
+    killall -HUP mDNSResponder   # 10.8+
+    dscacheutil -flushcache      # 10.7 below
 
+### Turn off spotlight
+
+    sudo vim /etc/hostconfig  # change SPOTLIGHT=-YES- to SPOTLIGHT=-NO-
+    mdutil -i off /

postgresql.md

@@ -2,3 +2,4 @@
  * Show tables: `\dt`
  * Show databases: `\l`
  * Show columns of a table: `\d table` or `\d+ table`
+

rails-features.md

@@ -0,0 +1,11 @@
+### Caching
+
+https://github.com/rails/actionpack-page_caching
+
+    class WeblogController < ActionController::Base
+      caches_page :show, :new
+    end
+
+This will generate cache files such as weblog/show/5.html and weblog/new.html, 
+     which match the URLs used that would normally trigger dynamic page 
+     generation