Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

javouhey / linux.sh

Created January 9, 2017 01:43 — forked from marcan/linux.sh

Linux kernel initialization, translated to bash

	#!/boot/bzImage

	# Linux kernel initialization code, translated to bash
	# (Minus floppy disk handling, because seriously, it's 2017.)
	# Not 100% accurate, but gives you a good idea of how kernel init works
	# GPLv2, Copyright 2017 Hector Martin <[email protected]>
	# Based on Linux 4.10-rc2.

	# Note: pretend chroot is a builtin and affects the current process
	# Note: kernel actually uses major/minor device numbers instead of device name

javouhey / latency.markdown

Created October 9, 2016 04:26 — forked from hellerbarde/latency.markdown

Latency numbers every programmer should know

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  =   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

javouhey / daemon.py

Created May 24, 2014 22:31 — forked from dcai/daemon.py

	#!/usr/bin/env python

	import sys, os, time, atexit
	from signal import SIGTERM

	class Daemon:
	"""
	A generic daemon class.

	Usage: subclass the Daemon class and override the run() method

javouhey / goinit

Created April 1, 2014 01:54 — forked from gamesbrainiac/goinit

	function goinit {
	export GOROOT=/usr/local/Cellar/go/1.2.1/libexec
	if [ $# -lt 1 ]
	then
	echo "No directories were created."
	export GOPATH=$(pwd -P)
	export PATH=$PATH:$GOPATH:$GOPATH/bin
	else
	echo "$1 being created"
	mkdir $1

javouhey / callprice.jl

Created February 20, 2014 18:35

	module CallPrice
	function callprice(S0, K, r, T, sigma, paths)
	Csum = 0.0
	for j = 1:paths
	Zs = randn()
	Zj = T(r-sigma.^2/2) + ZsT.^0.5*sigma
	STj = exp(Zj)*S0
	Csum += exp(-rT)max(STj - K,0.0)
	end
	return Csum/paths

javouhey / wget-exit-codes.txt

Created February 19, 2014 21:04 — forked from cosimo/wget-exit-codes.txt

	This is the list of exit codes for wget:

	0 No problems occurred
	1 Generic error code
	2 Parse error — for instance, when parsing command-line options, the .wgetrc or .netrc…
	3 File I/O error
	4 Network failure
	5 SSL verification failure
	6 Username/password authentication failure
	7 Protocol errors

javouhey / bash.generate.random.alphanumeric.string.sh

Created February 14, 2014 19:46 — forked from earthgecko/bash.generate.random.alphanumeric.string.sh

	#!/bin/bash
	# bash generate random alphanumeric string
	#

	# bash generate random 32 character alphanumeric string (upper and lowercase) and
	NEW_UUID=$(cat /dev/urandom \| tr -dc 'a-zA-Z0-9' \| fold -w 32 \| head -n 1)

	# bash generate random 32 character alphanumeric string (lowercase only)
	cat /dev/urandom \| tr -dc 'a-zA-Z0-9' \| fold -w 32 \| head -n 1

javouhey / 00-intro_errorreporting.txt

Created January 29, 2014 18:47 — forked from pfctdayelise/00-intro_errorreporting.txt

	These are snippets of py.test in action, used in a talk given at
	PyCon AU 2012 in Hobart, Tasmania. They are all relevant for
	py.test 2.2 except where specified. Where taken from open source
	projects I have listed a URL, some examples are from the py.test
	documentation, some are from my workplace.

	Apart from things called test_*, these functions should probably
	be in your conftest.py, although they can generally start life in
	your test files.

javouhey / d3-sprintf.js

Created January 17, 2014 05:45 — forked from stepheneb/d3-sprintf.js

	// A sprintf-like function using d3.js
	// https://gist.github.com/2045912

	function d3_sprintf(strings, formatters) {
	return formatters.reduce(function (strings, formatter, i) {
	strings[i] = formatter(strings[i]);
	return strings
	}, strings).join("");
	};