Chris Hoyean Song chris-chris

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?

	# From udacity Machine Learning Nanodegree course

	import numpy as np

	# Define sigmoid function
	def sigmoid(x):
	return 1/(1+np.exp(-x))

	# Derivative of the sigmoid function
	def sigmoid_derivative(x):

	import tensorflow as tf
	import numpy as np
	from tensorflow.python.ops import variable_scope
	from tensorflow.python.ops import init_ops
	from tensorflow.python.ops import array_ops
	from tensorflow.python.ops import variables
	from tensorflow.contrib.rnn.python.ops import rnn_cell

	res = []

	import numpy as np
	import tensorflow as tf
	from tensorflow.python.framework import dtypes

	# 1. Setting up initial values

	x = np.zeros((7, 7, 3))
	x[:, :, 0] = np.mat(
	"0 0 0 0 0 0 0;0 0 1 0 1 0 0;0 2 1 0 1 2 0;0 0 2 0 0 1 0;0 2 0 1 0 0 0;0 0 0 1 2 2 0;0 0 0 0 0 0 0"
	).A

	"""
	Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy)
	BSD License

	Korean translation
	최소 버전의 단어 레벨 바닐라 RNN 모델. Andrej Karpathy (@karpathy) 작성

	- Korean comments
	- Python3 compatibility update
	"""

	"""
	This is a batched LSTM forward and backward pass
	"""
	import numpy as np
	import code

	class LSTM:

	@staticmethod
	def init(input_size, hidden_size, fancy_forget_bias_init = 3):

	# 1. Install docker
	# https://docs.docker.com/install/linux/docker-ce/centos/#install-docker-ce-1

	sudo yum install -y yum-utils \
	device-mapper-persistent-data \
	lvm2

	sudo yum-config-manager \
	--add-repo \
	https://download.docker.com/linux/centos/docker-ce.repo

	# Inspired by https://gist.github.com/harel/9ced5ed51b97a084dec71b9595565a71

	from collections import namedtuple
	import functools
	import json
	import six

	Serialized = namedtuple('Serialized', 'json')

	#!/usr/bin/env bash
	# https://developers.supportbee.com/blog/setting-up-cucumber-to-run-with-Chrome-on-Linux/
	# https://gist.github.com/curtismcmullan/7be1a8c1c841a9d8db2c
	# http://stackoverflow.com/questions/10792403/how-do-i-get-chrome-working-with-selenium-using-php-webdriver
	# http://stackoverflow.com/questions/26133486/how-to-specify-binary-path-for-remote-chromedriver-in-codeception
	# http://stackoverflow.com/questions/40262682/how-to-run-selenium-3-x-with-chrome-driver-through-terminal
	# http://askubuntu.com/questions/760085/how-do-you-install-google-chrome-on-ubuntu-16-04

	# Versions
	CHROME_DRIVER_VERSION=`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE`

	<html>
	<head>
	<title>Teachable Machine Image Model with upload</title>
	</head>
	<body>
	<img id="imagePreview" style="height: 300px;" />
	<input id="imageUpload" type="file" />

	<div>Teachable Machine Image Model with upload</div>
	<div id="label-container"></div>