ross-nordstrom’s gists

ross-nordstrom / rxjs-recursive-poll.js

Last active December 31, 2016 18:57

Demonstration of using RxJS to implement a recursive API Poller. This is an improvement on the simple `Observable.interval()` approach, because we won't kill long-running queries.

	const rxjs = require('rxjs');

	/**
	* The entrypoint function. Pass it the thing to call
	*/
	function dynamicPoll(pollFunc/, delayFunc/) {
	// A recursive stream, which triggers an API call
	let i = 0; // just here for debugging
	const trigger = new rxjs.BehaviorSubject(i++);

ross-nordstrom / pre-commit

Last active March 26, 2016 17:54

Prevent commits with keywords you shouldn't ever have in production code. Just put this file under `<repo>/.git/hooks/pre-commit`

	#!/bin/sh

	for FILE in `git diff-index --name-only HEAD --` ; do
	# Check if the file contains 'debugger'
	if cat $FILE \| grep -q 'debugger' $FILE; then
	echo $FILE ' contains debugger!'
	exit 1
	fi

	# Check if the file contains 'console.log'

ross-nordstrom / prepare-commit-msg

Last active March 26, 2016 16:50

Takes a branch name like `myBranch_name-with/any^separators#12345` and adds `\n[#12345]` after the first line.

	#!/bin/sh

	#
	# Automatically add branch name to every commit message except merge commits.
	#

	COMMIT_MSG=$1

	addBranchName() {
	branchPath=$(git symbolic-ref -q HEAD)

ross-nordstrom / PLAYDOUGH_TIME.py

Created October 9, 2015 02:09

	#!/usr/bin/env python
	import json
	from datetime import datetime

	data = {}

	now = datetime.now()

	data['general_state'] = 1
	data['year'] = now.year

ross-nordstrom / PLAYDOUGH_SLA.rb

Created August 23, 2015 19:05

Speedtest.net Ping/Download/Upload breakdown

	#!/usr/bin/env ruby
	require 'json'

	#
	# Output with --simple looks like:
	# Ping: 31.823 ms
	# Download: 80.53 Mbit/s
	# Upload: 11.25 Mbit/s
	#
	speed = `speedtest --simple`

ross-nordstrom / PLAYDOUGH_CHANNEL_STRENGTHS.rb

Last active August 29, 2015 14:27

Get a breakdown of 2.4GHz channel utilization. Assumes wireless interface accessible at "wlan0".

	#!/usr/bin/env ruby
	require 'json'

	ALLOWED_CHANNELS = ['Ch 1', 'Ch 6', 'Ch 11']
	Infinity = Float::INFINITY

	wifi = `iwlist wlan0 scan`
	pieces2ghz = wifi.split("Cell ")[1..-1].select{\|x\| x.include?('Frequency:2') && x.include?('Channel ') }

	data = pieces2ghz.map{ \|x\| [ x.split('Channel ')[1].split(')')[0].to_i, (x.split('Signal level=')[1].split('/')[0] rescue '0').to_i, (x.split('Protocol:')[1].split("\n")[0] rescue '[UNKNOWN]') ] }

ross-nordstrom / PLAYDOUGH_WEATHER.rb

Last active August 29, 2015 14:25

Trend temperature and humidity. Note: only works on a Raspberry Pi with a DHT22 temp/humidity sensor.

	#!/usr/bin/env ruby
	require 'json'
	NORMAL = 1
	DEGRADED = 2
	EXCESSIVE = 3
	DOWN = 4

	def is_number? string
	true if Float(string) rescue false
	end

ross-nordstrom / PLAYDOUGH_SIGNALS.rb

Created October 5, 2014 17:34

Get a breakdown of WiFi utilization by relative signal strength. Assumes wireless interface accessible at "wlan0".

	#!/usr/bin/env ruby
	require 'json'
	wifi = `iwlist wlan0 scan`
	pieces2ghz = wifi.split("Cell ")[1..-1].select{\|x\| x.include?('Signal level=')}

	data = pieces2ghz.map{ \|x\| [(x.split('Signal level=')[1].split('/')[0] rescue '0').to_i ]}

	signals = { :'Very Weak' => 0, :Poor => 0, :Fair => 0, :Strong => 0 }
	signals = data.reduce(signals) do \|signals, x\|
	if(x[0] > 70)

ross-nordstrom / PLAYDOUGH_PROTOCOLS.rb

Created October 5, 2014 17:14

Get a breakdown of wifi protocol usage. Assumes wireless interface accessible at "wlan0".

	#!/usr/bin/env ruby
	require 'json'
	wifi = `iwlist wlan0 scan`
	pieces2ghz = wifi.split("Cell ")[1..-1]

	data = pieces2ghz.map{ \|x\| [ (x.split('Protocol:')[1].split("\n")[0] rescue '[UNKNOWN]') ] }

	protocols = data.reduce({}) do \|protocols, x\|
	protocols[x[0]] = protocols[x[0]] ? protocols[x[0]] + 1 : 1
	protocols

ross-nordstrom / PLAYDOUGH_CHANNEL_COUNTS.rb

Last active August 29, 2015 14:07

Get a breakdown of 2.4GHz channel utilization. Assumes wireless interface accessible at "wlan0".

	#!/usr/bin/env ruby
	require 'json'

	ALLOWED_CHANNELS = ['Ch 1', 'Ch 6', 'Ch 11']

	wifi = `iwlist wlan0 scan`
	pieces2ghz = wifi.split("Cell ")[1..-1].select{\|x\| x.include?('Frequency:2') && x.include?('Channel ') }

	data = pieces2ghz.map{ \|x\| [ x.split('Channel ')[1].split(')')[0].to_i, (x.split('Signal level=')[1].split('/')[0] rescue '0').to_i, (x.split('Protocol:')[1].split("\n")[0] rescue '[UNKNOWN]') ] }

Ross Nordstrom ross-nordstrom