Stephen Fox stephenjfox

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

frequently asked question:

Q: I would like to ask your advice about preparing for a role in data science

A:

my advice would be to put together a portfolio of projects, on GitHub, evidencing that you know how to

	# coding=utf-8

	import pandas as pd
	import itertools
	import time
	import multiprocessing
	from typing import Callable, Tuple, Union

	def groupby_parallel(groupby_df: pd.core.groupby.DataFrameGroupBy,
	func: Callable[[Tuple[str, pd.DataFrame]], Union[pd.DataFrame, pd.Series]],

	"""
	A minimal implementation of Monte Carlo tree search (MCTS) in Python 3
	Luke Harold Miles, July 2019, Public Domain Dedication
	See also https://en.wikipedia.org/wiki/Monte_Carlo_tree_search
	https://gist.github.com/qpwo/c538c6f73727e254fdc7fab81024f6e1
	"""
	from abc import ABC, abstractmethod
	from collections import defaultdict
	import math

	// This is an example of how to fetch external data in response to updated props,
	// If you are using an async mechanism that does not support cancellation (e.g. a Promise).

	class ExampleComponent extends React.Component {
	_currentId = null;

	state = {
	externalData: null
	};

	# -- coding: utf-8 --
	"""Example Google style docstrings.

	This module demonstrates documentation as specified by the `Google Python
	Style Guide`_. Docstrings may extend over multiple lines. Sections are created
	with a section header and a colon followed by a block of indented text.

	Example:
	Examples can be given using either the ``Example`` or ``Examples``
	sections. Sections support any reStructuredText formatting, including