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;; This is proof-of-concept, it's not idiomatic and needs a lot of refactoring, take it with a block of salt.
(ns gradient-descent.core)
;; Thetas with starting values
(def theta0 (atom 1))
(def theta1 (atom 1))
(def theta2 (atom 1))
#!/usr/bin/env ruby
require 'rubygems'
require 'chef'
require 'chef/client'
require 'chef/run_context'
Chef::Config[:solo] = true
Chef::Config[:log_level] = :info
Chef::Log.level(:info)
@kowey
kowey / net.johnmacfarlane.gitit.plist
Created December 2, 2010 18:29
Edit and save in ~/Library/LaunchAgents
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>WorkingDirectory</key>
<string>/Users/kowey/kowey-wiki</string>
<key>KeepAlive</key>
<true/>
<key>EnvironmentVariables</key>
<dict>
@debasishg
debasishg / gist:729080
Created December 5, 2010 13:32
ascii artwork for arrows
// joining of 2 arrows
(>>>) :: arr a b -> arr b c -> arr a c
(>>>)
a -- (f) --> b -- (g) --> c
// works on pairs
// f: a -> b
// g: a -> c
@yevgenko
yevgenko / .Xdefaults
Created August 24, 2011 02:58
URxvt settings with solarized theme
!-------------------------------------------------------------------------------
! Xft settings
!-------------------------------------------------------------------------------
Xft.dpi: 96
Xft.antialias: false
Xft.rgba: rgb
Xft.hinting: true
Xft.hintstyle: hintslight
@jonifreeman
jonifreeman / gist:1306258
Created October 22, 2011 17:35
Port of submit.m Octave functionality to Haskell
import System.IO
import Control.Exception
import Numeric.LinearAlgebra
import Data.Digest.Pure.SHA
import Data.ByteString.Lazy.Char8 as BS8 (pack)
import Data.List (sort)
import System.Random (randomRIO)
import Network.Curl
import Text.Printf (printf)
import Data.List.Split (splitOn)
@bdha
bdha / vbox_to_kvm.txt
Created March 1, 2012 04:04
Migrating from VirtualBox to KVM on ZFS
# It's important to convert the vbox image (VMDK or VDI or whatever) using
# the same version of VirtualBox that created it. You can try converting the image
# with qemu-img or kvm-img, but weird version mismatches will possibly make it not
# work.
# On your VirtualBox machine:
cd $VBOX_ROOT/$MACHINE_ROOT/
VBoxManage clonehd machine.vmdk machine.img --format RAW
scp machine.img root@kvm-host:/somewhere
@rrnewton
rrnewton / meta-par-accelerate_blog_post.lhs
Created May 4, 2012 19:19
meta-par-accelerate blog post
> module Main where
How to write hybrid CPU/GPU programs with Haskell
-------------------------------------------------
What's better than programming a GPU with a high-level,
Haskell-embedded DSL (domain-specific-language)? Well, perhaps
writing portable CPU/GPU programs that utilize both pieces of
@jboner
jboner / latency.txt
Last active May 24, 2024 12:40
Latency Numbers Every Programmer Should Know
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
@sseveran
sseveran / gist:3588176
Created September 1, 2012 21:37
Uncaught Exceptions
-- | when no catch frame handles an exception dump core and terminate the process
uncaughtExceptionHandler :: SomeException -> IO ()
{-# NOINLINE uncaughtExceptionHandler #-}
uncaughtExceptionHandler !e = do
syslog Error $ "Unhandled exception: " ++ show e
raiseSignal sigABRT
setDefaultUncaughtExceptionHandler :: IO ()
setDefaultUncaughtExceptionHandler =
setUncaughtExceptionHandler uncaughtExceptionHandler