| 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 |
| # 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 |
| class PeopleController < ApplicationController | |
| before_filter :authenticate_user!, :except => [:index, :show] | |
| ... | |
| end |
| *.aux | |
| *.glo | |
| *.idx | |
| *.log | |
| *.toc | |
| *.ist | |
| *.acn | |
| *.acr | |
| *.alg | |
| *.bbl |
This document has been modified from its [original format][m1], which was written by Ning Shang (geek@cerias.net). It has been updated and reformatted into a [Markdown][m2] document by [Woody Gilk][m3] and [republished][m4].
When working with a remote git repository which is hosted on a third-party storage server, data confidentiality sometimes becomes
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.
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'
| 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/>"); |
| I am not now, nor have I ever been, bound in law | |
| by conditions presented in the footer of communications | |
| from parties with whom I have no verbal, implied, literal | |
| or otherwise contract. | |
| By opening this email you have agreed to provide Mr Andrew | |
| Faraday with your organisations contact database, tangible | |
| assets and outstanding shares free of charge and at your | |
| personal expense. |
| #!/usr/bin/env bash | |
| # SEE YOU SPACE COWBOY by DANIEL REHN (danielrehn.com) | |
| # Displays a timeless message in your terminal with cosmic color effects | |
| # Usage: add "sh ~/seeyouspacecowboy.sh; sleep 2" to .bash_logout (or similar) in your home directory | |
| # (adjust the sleep variable to display the message for more seconds) | |
| # Cosmic color sequence |
