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javascript:var errors = jQuery('.console-output > span[style*="CD0000"]').clone(); jQuery('.console-output').empty(); jQuery('.console-output').append(errors); jQuery('.console-output > span').append("<br/>");

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Apple has changed how it distributes OS X Mavericks since its initial release in October 2013. This note was written on May 2, 2014. This affects the instructions you'll find online for how to make a bootable OS X installer.

It used to be that when you downloaded OS X from the App Store, the entire 5GB installer was placed in /Applications/Install OS X Mavericks.app. Now, there is a simple shortcut program placed in /Applications/OS X Mavericks.app. The app file is immediately removed in the event of an error or a successful post-install launch. When the download succeeds, the app file is launched which brings up the traditional install wizard, but this time mounted to /Volumes/Install OS X Mavericks.

I actually discovered this because if you already have a volume mounted of the same name (which I did, because I was trying to update my existing USB installer), the App Store download promptly fails right after finishing its download.

So if you have an empty disk you'd like to use as an installer that'

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Setting Up Clojure on OS X

I spent a lot of time trying to find a pretty optimal (for me) setup for Clojure… at the same time I was trying to dive in and learn it. This is never optimal; you shouldn't be fighting the environment while trying to learn something.

I feel like I went through a lot of pain searching Google, StackOverflow, blogs, and other sites for random tidbits of information and instructions.

This is a comprehensive "what I learned and what I ended up doing" that will hopefully be of use to others and act as a journal for myself if I ever have to do it again. I want to be very step-by-step and explain what's happening (and why) at each step.

Step 1: Getting Clojure (1.3)

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Transparent Git Encryption

This document has been modified from its [original format][m1], which was written by Ning Shang ([email protected]). It has been updated and reformatted into a [Markdown][m2] document by [Woody Gilk][m3] and [republished][m4].

Description

When working with a remote git repository which is hosted on a third-party storage server, data confidentiality sometimes becomes

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*.aux
*.glo
*.idx
*.log
*.toc
*.ist
*.acn
*.acr
*.alg
*.bbl

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class PeopleController < ApplicationController
  before_filter :authenticate_user!, :except => [:index, :show]
...
end

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# Instead of:
#    hash[:a].try(:[], :b).try(:[], :c).try(:[], :d)
# you can write
#    hash[:a, :b, :c, :d]

class Hash
  # h = {:a => {:b => {:c => 1}}}
  # p h[:a]             # => {:b => {:c => 1}}
  # p h[:a, :b]         # => {:c => 1}
  # p h[:a, :b, :c]     # => 1

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L1 cache reference                  0.5 ns
Branch mispredict                   5 ns
L2 cache reference                  7 ns
Mutex lock/unlock                   25 ns
Main memory reference               100 ns
Compress 1K bytes with Zippy        3,000 ns
Send 2K bytes over 1 Gbps network   20,000 ns
Read 1 MB sequentially from memory  250,000 ns
Round trip within same datacenter   500,000 ns
Disk seek                           10,000,000 ns