Malcolm Greaves malcolmgreaves

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

Recovering deleted files in Ubuntu with ext4 filesystem

Recently, I deleted some files by mistake in a Ubuntu machine with an ext4 fs. These notes document the steps I took to get them back.

Important

this procedure assumes that the partition that contained the deleted files is different from the root partition, as that was the scenario with which I had to deal (deleted files were in my home dir). The procedure needs that the partition that contained the files is unmounted, so if the deleted files were in the root partition, the process would be a bit different (e.g. storing the fs journal in a USB stick, using a live CD/USB to boot and issue the commands, etc.)
if something is not clear, you need more information, etc. check the sources below

With that out the way, let's begin.

	def foldl(zero, combine, elements):
	if callable(zero):
	result = zero()
	else:
	result = zero
	for x in elements:
	result = combine(result, x)
	return result

	def foldr(zero, combine, elements):

	from functools import partial
	from operator import concat
	from os.path import isfile

	from fold import foldl


	def _list_files_from(part, prev):
	current = "%s/%s" % (prev, part)
	if isfile(current):

	UNDERSTANDING HASH FUNCTIONS
	by Geoff Pike

	Version 0.2 --- early draft --- comments and questions welcome!
	References appear in square brackets.

	1 INTRODUCTION

	Hashing has proven tremendously useful in constructing various fast
	data structures and algorithms. It is typically possible to simplify

	machine:
	environment:
	MINICONDA: "$HOME/miniconda"
	MINICONDA_PATH: "$MINICONDA/bin"
	PATH: "$MINICONDA_PATH:$PATH"
	CONDA: "$MINICONDA_PATH/conda"
	ANACONDA: "$MINICONDA_PATH/anaconda"
	# This ensures we don't accidentally pull in ~/.condarc
	# if it happens to be there for some strange reason
	CONDARC: "$MINICONDA/condarc.none"

	#include <cmath>
	#include <iostream>

	using std::cout;
	using std::endl;

	float quake3_hack(float number) {
	float x2 = number * 0.5f;
	float y = number;
	long i = (long) & y;

	object BinomialHypothesisTest {

	def tTestBinomial(p1:Double, n1:Int, p2:Double, n2:Int): TtestRes = {
	val k = (n1p1 + n2p2) / (n1 + n2).toDouble
	val z = (p1 - p2) / math.sqrt( k(1 - k) (1 / n1.toDouble + 1 / n2.toDouble) )
	if(z > scoreForTwoTailed95CiPval)
	RejectNull
	else
	FailToReject
	}