Sergey ⚗️ Kuznetsov cr0t

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Origin: https://appunite.com/blog/let-the-force-be-with-livebook

Save this as .livemd and open with running Livebook server to evaluate.

Prerequisites

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

	Mix.install([
	{:benchee, "~> 1.0"}
	])

	defmodule Cruncher do
	def async(n) do
	1..n
	\|> Task.async_stream(&(&1 ** 2))
	\|> Enum.reduce(0, fn {:ok, s}, acc -> s + acc end)
	end

	Mix.install([
	{:benchee, "~> 1.0"}
	])

	defmodule BirdCond do
	def busy_days(list) do
	cond do
	list == [] -> 0
	hd(list) < 5 -> busy_days(tl(list))
	true -> 1 + busy_days(tl(list))

	# Origin: https://blog.sequin.io/how-we-used-elixirs-observer-to-hunt-down-bottlenecks/
	defmodule Overload do
	# Define a CPU-intenstive work function, which can call itself
	# recursively (forever)
	def recursive do
	:public_key.generate_key({:rsa, 4096, 65537})
	recursive()
	end
	end

	% Read more:
	% - https://joearms.github.io/published/2013-11-21-My-favorite-erlang-program.html
	% - https://ferd.ca/my-favorite-erlang-container.html
	%
	% How to run:
	% $ erl
	% > c(uni).
	% {ok,uni}
	% > uni:test().
	% 30414093201713378043612608166064768844377641568960512000000000000

	defmodule Reader do
	defmodule SensorHub do
	@moduledoc """
	Opens the first I2C bus ("i2c-1") and reads from SensorHub device address (0x17).

	Updates its internal state periodically (every second in the example below).

	Below you can find a table of registers, that we found on their website:
	https://wiki.52pi.com/index.php/DockerPi_Sensor_Hub_Development_Board_SKU:_EP-0106

	`sudo purge`

	memory_by_process = Hash.new(0)
	processes = `ps aux`

	m_bytes = processes.split("\n").reduce(0) { \|memo, prc\|
	fields = prc.split(/\s+/)

	mem_bytes = fields[5].to_i
	prc_name = fields[10...fields.length].join(' ')

	CODESWARM_DIR="/home/user/src/code_swarm/"

	# extract from your git repo
	git log --name-status --pretty=format:'%n------------------------------------------------------------------------%nr%h \| %ae \| %ai (%aD) \| x lines%nChanged paths:' > $CODESWARM_DIR/data/activity.log

	# convert to XML for CodeSwarm
	python convert_logs/convert_logs.py \
	-g $CODESWARM_DIR/data/activity.log -o $CODESWARM_DIR/data/activity.xml

	# create a new config that points to the correct input XML and saves snapshots

	# See https://help.github.com/articles/ignoring-files for more about ignoring files.
	#
	# If you find yourself ignoring temporary files generated by your text editor
	# or operating system, you probably want to add a global ignore instead:
	# git config --global core.excludesfile '~/.gitignore_global'

	.DS_Store

	# Ignore bundler config.
	/.bundle