Neal Fultz nfultz

Setting up Pi Zero OTG - The quick way (No USB keyboard, mouse, HDMI monitor needed)

More details - http://blog.gbaman.info/?p=791

For this method, alongside your Pi Zero, MicroUSB cable and MicroSD card, only an additional computer is required, which can be running Windows (with Bonjour, iTunes or Quicktime installed), Mac OS or Linux (with Avahi Daemon installed, for example Ubuntu has it built in).
1. Flash Raspbian Jessie full or Raspbian Jessie Lite onto the SD card.
2. Once Raspbian is flashed, open up the boot partition (in Windows Explorer, Finder etc) and add to the bottom of the config.txt file dtoverlay=dwc2 on a new line, then save the file.
3. If using a recent release of Jessie (Dec 2016 onwards), then create a new file simply called ssh in the SD card as well. By default SSH i

DataFire Dataflow: Sync GitHub issues to spreadsheet

Deprecated - DataFire is now out of beta. You can use the new version of this project on DataFire.io, or view it on GitHub

Pulls all new issues from a GitHub repo into a spreadsheet

View on DataFire

[metadata]: ./ '{"links":[{"connection":"563b9b84ea9ad5f345e97505","operation":{"method":"get","path":"/repos/{ownerId}/{repoId}/issues"}},{"connection":"563b9b85ea9ad5f345e97511","operation":{"method":"get","path":"/list/{key}/{worksheetId}/{visibility}/{projection}"}},{"connection":"563b9b85ea9ad5f345e97511","operation":{"method":"put","path":"/cells/{key}/{worksheetId}/{visibility}/{projection}/{cellId}"}},{"connection":"563b9b85ea9ad5f345e97511","operation":{"method":"post","path":"/list/{key}/{worksheetId}/{visibility}/{pro

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

Comprehensions in Python the Jedi way

by Bjørn Friese

Beautiful is better than ugly. Explicit is better than implicit.

-- The Zen of Python

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

Indexed DB - N-Dimensional Selection

The problem

We have an index with keys of the form:

[ dim1, dim2, dim3, ... ]

e.g. created with:

Simple Security Guidelines

Using an iDevice? (Best option)

Use an iPod or an iPad without a SIM card
Use an iPhone
Do not jailbreak
Always upgrade to new iOS versions
Use Brave browser

	'''
	This is an example of how to send data to Slack webhooks in Python with the
	requests module.
	Detailed documentation of Slack Incoming Webhooks:
	https://api.slack.com/incoming-webhooks

	'''

	import json
	import requests

	def xtab(*cols, apply_wt=False):
	'''
	returns:
	(i) xt, NumPy array storing the xtab results, number of dimensions is equal to
	the len(args) passed in
	(ii) unique_vals_all_cols, a tuple of 1D NumPy array for each dimension
	in xt (for a 2D xtab, the tuple comprises the row and column headers)
	pass in:
	(i) 1 or more 1D NumPy arrays of integers
	(ii) if wts is True, then the last array in cols is an array of weights

	#!/usr/bin/env ruby

	require 'time'

	def die(str)
	$stderr.puts str
	exit
	end

	def usage