Mark R. Johnson MarkRobertJohnson

Software Architect, Engineer, and DevOps enthusiast. Passionate about service oriented architecture and infrastructure automation.

MarkRobertJohnson / process_cpu_history.py

Last active October 17, 2025 05:09

CPU Usage History Grapher for a Selected Process

	#!/usr/bin/env python3
	"""
	CPU Usage History Grapher for a Selected Process

	Features:
	- Select process by PID or exact name (case-insensitive).
	- Progress indicator with elapsed time, remaining time (ETA), and % complete.
	- Warm-up to avoid inflated first sample.
	- Optional normalization to 0–100% of total system CPU (across all logical CPUs).
	- Optional EMA (Exponential Moving Average) smoothing to tame spikes (applies to the plotted/summary values).

MarkRobertJohnson / two_osc_synth.html

Created December 31, 2023 23:58

Web Audio Synthesis Starter (two osciallators)

	<html>
	<!--
	A Simple example using sliders to control the frequencies of two oscillators
	-->
	<body>
	<div>
	<label for="frequency1">Frequency 1: </label>
	<input type="range" id="frequency1" min="0" max="4000" value="600">
	<span id="frequency1Value">600</span> Hz
	</div>

MarkRobertJohnson / SetMaxEnvelopSizekb.otter

Created September 26, 2018 04:25

Set the MaxEnvelopeSizekb in OtterScript

	PSEnsure
	(
	Key: PowerShell MaxEnvelopeSizekb,
	Value: $PowerShell_MaxEnvelopeSizekb,
	Collect: "(Get-Item WSMan:\localhost\MaxEnvelopeSizekb).Value",
	Configure: "Set-Item WSMan:\localhost\MaxEnvelopeSizekb -Value $PowerShell_MaxEnvelopeSizekb"
	);

MarkRobertJohnson / Install-AzureServiceFabric.ps1

Last active April 4, 2018 18:19

Install Service Fabric


	if(!(Get-Command choco -erroraction SilentlyContinue)) {
	Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))
	}
	choco install webpicmd -y

	$webpicmd = 'webpicmd'

	if(!(Get-Command $webpicmd -erroraction SilentlyContinue )) {
	$webpicmd = 'C:\Program Files\Microsoft\Web Platform Installer\WebpiCmd.exe'

MarkRobertJohnson / Get-SeqGuid2.ps1

Created January 13, 2018 23:18

Get sequential GUIDs without using Windows DLL.

	$c = @"
	using System;

	public class SequentialGuid {
	Guid _CurrentGuid;
	public Guid CurrentGuid {
	get {
	return _CurrentGuid;
	}
	}

MarkRobertJohnson / Get-SeqGuid.ps1

Created January 13, 2018 23:01

Generates sortable sequential GUIDs

	$c = @"
	using System;
	using System.Runtime.InteropServices;

	public static class SeqGuid {
	private class NativeMethods
	{
	[DllImport("rpcrt4.dll", SetLastError=true)]
	public static extern int UuidCreateSequential(out Guid guid);
	}

MarkRobertJohnson / musicKeys.html

Last active April 7, 2018 15:20

A little polyphonic synthesizer that run in the browser. Uses computer keyboard to trigger notes.

	<html>
	<header>

	<script lang="javascript" >
	var audioCtx = new (window.AudioContext \|\| window.webkitAudioContext)();

	var sineTerms = new Float32Array([0, 0, 1, 0, 1]);
	var cosineTerms = new Float32Array(sineTerms.length);
	var customWaveform = audioCtx.createPeriodicWave(cosineTerms, sineTerms);

MarkRobertJohnson / proget-install-macosx.sh

Created November 10, 2017 18:53

	#!/bin/bash

	#Docker commands taken from: https://inedo.com/support/kb/1100/getting-started-with-proget-for-linux#limitations

	brew cask install docker

	#Now, go and start start docker from finder

	mkdir -pv /private/var/proget/db
	mkdir -pv /private/var/proget/packages

MarkRobertJohnson / prop.snippet

Created September 19, 2017 23:25

Visual Studio snippet for TypeScript property setter and getter

	<CodeSnippet Format="1.1.0" xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
	<Header>
	<Title>prop</Title>
	<Author>Mark R. Johnson</Author>
	<Shortcut>prop</Shortcut>
	<Description>Code snippet for a property</Description>
	<SnippetTypes>
	<SnippetType>Expansion</SnippetType>
	</SnippetTypes>
	</Header>

MarkRobertJohnson / CredentialManager.cs

Created August 17, 2016 21:33 — forked from meziantou/CredentialManager.cs

Using the Windows Credential API (CredRead, CredWrite, CredDelete, CredEnumerate)

	using System;
	using System.Collections.Generic;
	using System.ComponentModel;
	using System.Runtime.InteropServices;
	using System.Text;
	using Microsoft.Win32.SafeHandles;

	public static class CredentialManager
	{
	public static Credential ReadCredential(string applicationName)