John Lusk JohnL4

Coding since 1977, in one form or another, on just about everything but AS/400s and VAXen.

7 followers · 5 following

Research Triangle, NC, USA
www.how-hard-can-it-be.com

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JohnL4 / set-appropriate-pixel-resolution-in-gimp.txt

Created January 27, 2021 15:46

	Physical display pixels/in. = # of pixels on diagonal / diagonal size of monitor

	e.g., Phililps PHL 346B1C is a 34" ultra-wide at 3440x1440

	PowerShell:

	> $d = 34403440 + 14401440
	> [Math]::Sqrt($d) # Pixels on the diagnoal
	> [Math]::Sqrt($d)/34 # Pixels/in., matches manufacturer claim of 110 ppi.

JohnL4 / howto-create-gmail-alias.txt

Last active December 15, 2020 16:39

Creating yet another new alias in gmail

	I usually UNCHECK the "treat as alias" checkbox

	server: smtp.gmail.com (no "@", dummy)
	user: [email protected]
	password: app password from google acct mgmt ("security/sign on")


	yay, google sends you a verification email

JohnL4 / passwd-securestring-mechanics.ps1

Last active November 20, 2020 21:11

Store and retrieve a password using Microsoft's magical amazing SecureString functions

	$passwd = ConvertTo-SecureString 'hunter2' -AsPlainText -Force
	[Runtime.InteropServices.Marshal]::PtrToStringAuto([Runtime.InteropServices.Marshal]::SecureStringToBSTR($passwd))

	# Another way to get the password in w/out putting it in a command line as above.
	$passwd = Read-Host -AsSecureString
	[Runtime.InteropServices.Marshal]::PtrToStringAuto([Runtime.InteropServices.Marshal]::SecureStringToBSTR($passwd))

	$bytes = (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16)
	$bytes.length # Should be 16

JohnL4 / create-grafana-annotation.ps1

Created November 5, 2020 22:33

Create a Grafana annotation via the api in PowerShell

	$grafana = "http://yerhost:3000"

	$headers = @{ Accept = "application/json"; Authorization = "Bearer yerApiKey" }

	# This is how you get your timezone handled properly. Also, this lovely .ToUnixTimeMilliseconds() is just the ticket.
	#
	$timeEpoch = (new-object DateTimeOffset -ArgumentList $(get-date)).ToUnixTimeMilliseconds()

	# Panel id is optional.
	#

JohnL4 / grep-sort-uniq-PowerShell-vs-Unix.md

Last active September 30, 2020 15:01

grep | sort | uniq in PowerShell vs. Unix

PowerShell:

cat Temp\dashboard-plus-reset-filters-to-default-plus-turn-off-one-cascading-filter.json `
  | Select-String '"count": [0-9]+' `
  | select -expand Matches `
  | % {$_.Value} `
  | sort `
  | gu

JohnL4 / httpServer.py

Created September 23, 2020 14:59

Use Python to simply server files from local dir, giving javascript the correct MIME type.

	# Use to create local host, server javascript modules w/the correct mimetime.
	# See https://stackoverflow.com/a/60638762
	#
	import http.server
	import socketserver

	PORT = 8080

	Handler = http.server.SimpleHTTPRequestHandler
	Handler.extensions_map.update({

JohnL4 / log-config.yaml

Created September 10, 2020 21:38

Complex logging configuration in python, using the "logging" module and yaml configuration

	version: 1

	formatters:
	# Note that the following formats may use the 'hostname' attribute, which is non-standard. Be sure to use an adapter
	# or a filter to get that info into the LogRecord context or ugliness will result.
	# See:
	# - mem_cleaner2.HostnameLoggerAdapter
	# - https://docs.python.org/3/howto/logging-cookbook.html#adding-contextual-information-to-your-logging-output
	#
	oneLine:

JohnL4 / index.html

Last active September 2, 2020 19:37

Vivid CSS3 Spinner

	<section class="wrapper">
	<div class="spinner">
	<i></i>
	<i></i>
	<i></i>
	<i></i>
	<i></i>
	<i></i>
	<i></i>
	</div>

JohnL4 / insert-current-line-number.el

Created July 13, 2020 14:55

Insert current line number at a place in a file (emacs lisp)

+; For use in editing files of programming languages that don't have "current line number" functions.
+; Looking at you, k6.io.
+; Include in macro or defun, obviously.
+(insert (format "%d" (line-number-at-pos)))

JohnL4 / converting-epoch-timestamps.py

Created July 10, 2020 16:52

Converting epochs as given in jwt iat fields to human-readable timestamps

	# PS S:\JLusk\Play\k6> python
	# Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:37:02) [MSC v.1924 64 bit (AMD64)] on win32
	# Type "help", "copyright", "credits" or "license" for more information.

	from datetime import *
	dt = datetime.fromtimestamp(1594396899)
	dt.strftime( "%c")
	# 'Fri Jul 10 12:01:39 2020'
	quit()

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