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brian piercy bjpcjp

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View nodejs setup on Dreamhost VPS
1) Make a download dir to store the node source and download it.
mkdir downloads
cd downloads
git clone
Find the latest version
2) List all of the tags in the repository, and check out the most recent.
git tag
git checkout v0.9.9
bjpcjp /
Created Jan 15, 2022 — forked from bfan1256/
5 Performance Metrics for Trading Algorithms and Investment Portfolios
from blankly import Alpaca, CoinbasePro # supports stocks, crypto, and forex
import numpy as np
from math import sqrt
def cagr(start_value: float, end_value: float, years: int):
return (end_value / start_value) ** (1.0 / years) - 1
def sharpe(account_values: np.array, risk_free_rate, annualize_coefficient):
diff = np.diff(account_values, 1) / account_values[1:] # this gets our pct_return in the array
# Author: Tom Dupre la Tour
# License: BSD 3 clause
import time
import sys
import annoy
except ImportError:
print("The package 'annoy' is required to run this example.")
bjpcjp / gist:73c9f2048fe174ec335c891815731778
Created Jul 30, 2020
Rails - test failure out-of-the-box
View gist:73c9f2048fe174ec335c891815731778
# Rails
# '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.
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>'
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 / 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:

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 /
Created Feb 20, 2019
$python -- launches basic example of Dash web app framework. View results on localhost port# 8050.
import dash
import dash_core_components as dcc
import dash_html_components as html
external_stylesheets = ['']
app = dash.Dash(__name__, external_stylesheets=external_stylesheets)
app.layout = html.Div(children=[
html.H1(children='Hello Dash'),
bjpcjp /
Created Feb 8, 2018 — forked from theriley106/
Scraping Valid Addresses from all US ZipCodes
import sys
import requests
import bs4
import zipcode
import threading
import re
import json
import time
bjpcjp / main.r
Created Feb 8, 2016
Build your own neural network classifier in R (source:
View main.r
# How to build your own NN classifier in r
# source:
# reference:
# 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: