adragomir

#!/usr/bin/env python

import os
from optparse import OptionParser

parser = OptionParser()
parser.add_option("-v", "--verbose", dest="verbose",
		   help="print verbose messages. Try -vv, -vvv for \
			more verbose messages", action="count")

adragomir

### Keybase proof

I hereby claim:

  * I am adragomir on github.
  * I am adragomir (https://keybase.io/adragomir) on keybase.
  * I have a public key whose fingerprint is A51D 4079 382D A12E 53AB  3D6E 7E1F AF2F 7AE5 2C0C

To claim this, I am signing this object:

adragomir

    diff :: Expr -> Expr
    diff e =
      case e of
        (Lit _) -> Lit 0
        (Const _) -> Lit 0
        (Exp Var) -> Exp Var
        (Exp x) -> diff $ Apply (Exp Var) x
        (Ln Var) -> Inv Var
        (Ln x) -> diff $ Apply (Ln Var) x
        (Cos Var) -> Neg $ Sin Var

adragomir

package main

import (
	"crypto"
	"crypto/rand"
	"crypto/rsa"
	"crypto/sha1"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/pem"

adragomir

[Unit]
Description=Create AWS partitions
DefaultDependencies=false
Before=local-fs-pre.target var.mount mnt-data_1.mount -.mount local-fs.target

[Service]
Type=oneshot
ExecStart=/bin/sh /etc/early-boot.sh
RemainAfterExit=yes

adragomir

#!/bin/bash

# get the absolute path of the executable
SELF_PATH=$(cd -P -- "$(dirname -- "$0")" && pwd -P) && SELF_PATH=$SELF_PATH/$(basename -- "$0")

# resolve symlinks
while [ -h $SELF_PATH ]; do
	# 1) cd to directory of the symlink
	# 2) cd to the directory of where the symlink points
	# 3) get the pwd

adragomir

{
  "AWSTemplateFormatVersion" : "2010-09-09",

  "Description" : "Creates networking infrastructure.",

  "Parameters" : {

    "BastionKeyName" : {
      "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the bastion host",
      "Type" : "String",

adragomir

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
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 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory

adragomir

# OSX for Hackers (Mavericks/Yosemite)
#
# Source: https://gist.github.com/brandonb927/3195465

#!/bin/sh

# Some things taken from here
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

# Ask for the administrator password upfront

adragomir

import (
        "bytes"
        "code.google.com/p/gopacket"
        "code.google.com/p/gopacket/examples/util"
        "code.google.com/p/gopacket/layers"
        "code.google.com/p/gopacket/pcap"
        "github.com/nsf/termbox-go"
        "log"
        "regexp"
)