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bjpcjp / denominator-snippet.rb
Created Sep 12, 2012 — forked from rweald/denominator-snippet.rb
Code Snippets for Simple Linear Regression Using Ruby Blog Post
View denominator-snippet.rb
denominator = @xs.reduce(0) do |sum, x|
sum + ((x - x_mean) ** 2)
end
View stackoverflow_spider.py
import scrapy
class StackOverflowSpider(scrapy.Spider):
name = 'stackoverflow'
start_urls = ['http://stackoverflow.com/questions?sort=votes']
def parse(self, response):
for href in response.css('.question-summary h3 a::attr(href)'):
View multithreaded.stitchfix.com_blog_20160113_market-watch
# source: http://multithreaded.stitchfix.com/blog/2016/01/13/market-watch/
# https://github.com/klarsen1/MarketMatching
# from terminal command line:
sudo apt-get install libcurl4-openssl-dev
# from R command line:
# install CausalImpact package:
install.packages("devtools")
@bjpcjp
bjpcjp / main.r
Created Feb 8, 2016
Build your own neural network classifier in R (source: http://junma5.weebly.com/data-blog)
View main.r
# How to build your own NN classifier in r
# source: http://www.r-bloggers.com/build-your-own-neural-network-classifier-in-r/
# reference: http://junma5.weebly.com/data-blog/build-your-own-neural-network-classifier-in-r
# project:
# 1) build simple NN with 2 fully-connected layers
# 2) use NN to classify a dataset of 4-class 2D images & visualize decision boundary.
# 3) train NN with MNIST dataset
# ref: stanford CS23 source: http://cs231n.github.io/
@bjpcjp
bjpcjp / housingScrape.py
Created Feb 8, 2018 — forked from theriley106/housingScrape.py
Scraping Valid Addresses from all US ZipCodes
View housingScrape.py
import sys
reload(sys)
sys.setdefaultencoding("utf-8")
import requests
import bs4
import zipcode
import threading
import re
import json
import time
@bjpcjp
bjpcjp / dash-hello-world.py
Created Feb 20, 2019
$python app.py -- launches basic example of Dash web app framework. View results on localhost port# 8050.
View dash-hello-world.py
import dash
import dash_core_components as dcc
import dash_html_components as html
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
app = dash.Dash(__name__, external_stylesheets=external_stylesheets)
app.layout = html.Div(children=[
html.H1(children='Hello Dash'),
View prodmgmt-art-of-profitability-booknotes.md

The Art of Profitability

Original notes by James Clear

  • Do the math yourself. Too many people take numbers from unreliable sources.

  • There are 4 levels of learning: Awareness, Awkwardness, Application, Assimilation

  • Customer-Solution Profit: Know your customers incredibly well and create a solution specifically for them.

@bjpcjp
bjpcjp / gist:6c44091abd0e8e7b35b30cb0d773709a
Created Apr 14, 2020
$vagrant plugin install vagrant-share error
View gist:6c44091abd0e8e7b35b30cb0d773709a
Bundler, the underlying system Vagrant uses to install plugins,
reported an error. The error is shown below. These errors are usually
caused by misconfigured plugin installations or transient network
issues. The error from Bundler is:
conflicting dependencies fog-core (~> 1.43.0) and fog-core (= 1.45.0)
Activated fog-core-1.45.0
which does not match conflicting dependency (~> 1.43.0)
Conflicting dependency chains:
@bjpcjp
bjpcjp / gist:c3bb322015e80a11a98463ac5025408a
Created May 15, 2020
$rails (6.0.3) test issue - unknown root cause
View gist:c3bb322015e80a11a98463ac5025408a
31: from -e:1:in `<main>'
30: from /home/<myname>/.rbenv/versions/2.5.1/lib/ruby/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:72:in `require'
29: from /home/<myname>/.rbenv/versions/2.5.1/lib/ruby/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:72:in `require'
28: from /home/<myname>/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:55:in `load'
27: from /home/<myname>/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:55:in `load'
26: from /home/<myname>/projects/ideas/factory-inabox/v20200501/bin/rails:9:in `<top (required)>'
25: from /home/<myname>/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/zeitwerk-2.3.0/lib/zeitwerk/kernel.rb:23:in `require'
24: from /home/<myname>/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
23: from /home/<myname>/.rbenv/versions/2.5.1/lib/ru
@bjpcjp
bjpcjp / gist:73c9f2048fe174ec335c891815731778
Created Jul 30, 2020
Rails 6.0.2.3 - test failure out-of-the-box
View gist:73c9f2048fe174ec335c891815731778
# Rails 6.0.2.3
# 'Behavior' = std Rails scaffold with one name:string attribute.
# rails db:migrate = no problem.
# rails test = 2 fails below. other controllers (~60, identical except for object name) pass.
Error:
BehaviorsControllerTest#test_should_destroy_behavior:
NoMethodError: undefined method `count' for ActionDispatch::IntegrationTest::Behavior:Module
test/controllers/behaviors_controller_test.rb:42:in `block in <class:BehaviorsControllerTest>'
test/controllers/behaviors_controller_test.rb:42:in `block in <class:BehaviorsControllerTest>'