- R Markdown
Use a productive notebook interface to weave together narrative text and code to produce elegantly formatted output. Use multiple languages including R, Python, and SQL.
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# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine | |
# This is how I upload my new Sol Trader builds (http://soltrader.net) | |
# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash | |
S3KEY="my aws key" | |
S3SECRET="my aws secret" # pass these in | |
function putS3 | |
{ | |
path=$1 |
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Section "InputClass" | |
Identifier "touchpad" | |
Driver "synaptics" | |
MatchIsTouchpad "on" | |
# Enables Palm Detection to prevent bad clicks | |
# This seems to work on PS/2, but not on i2c | |
Option "PalmDetect" "1" | |
Option "PalmMinWidth" "8" | |
Option "PalmMinZ" "100" | |
# Enable clickpad support |
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reload() { | |
source ${BASH_SOURCE[0]} | |
} | |
alias r=reload | |
get-image-field() { | |
local imageId=$1 | |
local field=$2 | |
: ${imageId:? reuired} |
Since this is on Hacker News and reddit...
- No, I don't distribute my résumé like this. A friend of mine made a joke about me being the kind of person who would do this, so I did (the link on that page was added later). My actual résumé is a good bit crazier.
- I apologize for the use of
_t
in my types. I spend a lot of time at a level where I can do that; "reserved for system libraries? I am the system libraries". - Since people kept complaining, I've fixed the assignments of string literals to non-const
char *
s. - My use of
type * name
, however, is entirely intentional. - If you're using an older compiler, you might have trouble with the anonymous unions and the designated initializers - I think gcc 4.4 requires some extra braces to get them working together. Anything reasonably recent should work fine. Clang and gcc (newer than 4.4, at le
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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#!/bin/sh | |
# | |
# Copyright (C) 2010 Matthias Buecher (http://www.maddes.net/) | |
# | |
# This program is free software; you can redistribute it and/or modify | |
# it under the terms of the GNU General Public License as published by | |
# the Free Software Foundation; either version 2 of the License, or | |
# (at your option) any later version. | |
# http://www.gnu.org/licenses/gpl-2.0.txt |