I'm trying to figure out how to use rebar to:
- create erlang project
- add a dependency on an erlang module from github
- start the app via the erl console
- create a release and start the app from the release (via the generated scripts)
/* | |
* I add this to html files generated with pandoc. | |
*/ | |
html { | |
font-size: 100%; | |
overflow-y: scroll; | |
-webkit-text-size-adjust: 100%; | |
-ms-text-size-adjust: 100%; | |
} |
# This file describes the network interfaces available on your system | |
# and how to activate them. For more information, see interfaces(5). | |
# The loopback network interface | |
auto lo | |
iface lo inet loopback | |
# The primary network interface | |
auto eth0 | |
iface eth0 inet dhcp |
# put this in your .bash_profile | |
if [ $ITERM_SESSION_ID ]; then | |
export PROMPT_COMMAND='echo -ne "\033];${PWD##*/}\007"; ':"$PROMPT_COMMAND"; | |
fi | |
# Piece-by-Piece Explanation: | |
# the if condition makes sure we only screw with $PROMPT_COMMAND if we're in an iTerm environment | |
# iTerm happens to give each session a unique $ITERM_SESSION_ID we can use, $ITERM_PROFILE is an option too | |
# the $PROMPT_COMMAND environment variable is executed every time a command is run | |
# see: ss64.com/bash/syntax-prompt.html |
import Data.Vector ((!)) | |
import qualified Data.Vector as V | |
import Data.Vector.Generic.Mutable (write) | |
step ws state = case updatable of [] -> state | |
(i,_):_ -> V.modify (\v -> write v i (o i)) state | |
where | |
n = V.length state | |
w i j = ws ! i ! j |
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 |