mark-d-holmberg’s gists

char0n / api_data_structure.ex

Last active August 1, 2022 16:03

Model example how to use Ecto to validate nested JSON data in you API payloads

	defmodule ApiDataStructure do
	defmodule User do
	use Ecto.Schema

	import Ecto.Changeset

	alias ApiDataStructure.Profile

	embedded_schema do
	field :username, :string

jamesgmarks / gist:56502e46e29a9576b0f5afea3a0f595c

Last active October 7, 2025 13:04

MySQL/MariaDB BIN_TO_UUID and UUID_TO_BIN Polyfill

	DELIMITER //

	CREATE FUNCTION BIN_TO_UUID(b BINARY(16))
	RETURNS CHAR(36)
	BEGIN
	DECLARE hexStr CHAR(32);
	SET hexStr = HEX(b);
	RETURN LOWER(CONCAT(
	SUBSTR(hexStr, 1, 8), '-',
	SUBSTR(hexStr, 9, 4), '-',

srevenant / time.ex

Last active October 10, 2019 19:41

Time bits for use in Elixir. Sometime, it's easier to just fall back to posix time... LMK if you find better ways to do this!

	defmodule Utils.Time do
	import Utils.Types, only: [str_to_int!: 1, str_to_float: 1]
	import Utils.Enum, only: [enum_rx: 2]

	# note for future
	# https://hexdocs.pm/nimble_parsec/NimbleParsec.html

	def iso_time_range(input) when is_binary(input) do
	case String.split(input, "/") do
	[stime, etime] ->

mark-d-holmberg / rails-5.2.3-ruby-2.6.4-gem-engine

Created September 10, 2019 20:51

Create a Rails 5.2.3 on Ruby 2.6.4 Gem engine running API JSON mode only

rails plugin new elemental -d mysql --mountable -T --dummy-path=spec/dummy --skip-action-mailer -C --skip-turbolinks --skip-action-cable --skip-spring --skip-active-storage --skip-coffee --skip-yarn --api -p

srevenant / Node.JS healthcheck

Last active September 6, 2018 18:12

Designed for use with reflex's version-check https://github.com/reflexsc/reflex/blob/master/dev/version-check

	/* bring in configs, and backends, like db */
	/* const config = require('config') */

	let healthy = true

	setInterval(() => {
	// check db pools, maybe run a query, etc.
	try {
	if (db.check_health()) { // but do this with a timelimit that is less than check interval seconds
	healthy = true

srevenant / .bashrc

Last active September 7, 2018 18:36

fast-forward git bash helpers

	# When working on a project with multiple developers master will get ahead of your work.
	# To come in sync should you rebase? merge? what is a fast-forward? Lots of discussion
	# is available on this, here are a few:
	# https://hackernoon.com/git-merge-vs-rebase-whats-the-diff-76413c117333
	# https://www.atlassian.com/git/tutorials/merging-vs-rebasing
	#
	# I prefer a merge/fast-forward, rather than rebase. These helpers assist in that process.

	# LMK your thoughts and if you know of a better way! Enjoy!

tkfu / srd_5e_monsters.json

Last active November 25, 2025 15:11

A JSON file with all the D&D 5e SRD monster data

	[
	{
	"name": "Aboleth",
	"meta": "Large aberration, lawful evil",
	"Armor Class": "17 (Natural Armor)",
	"Hit Points": "135 (18d10 + 36)",
	"Speed": "10 ft., swim 40 ft. ",
	"STR": "21",
	"STR_mod": "(+5)",
	"DEX": "9",

elderbas / class_controller.ex

Last active April 5, 2024 03:35

Elixir — Inserting Multiple Changesets Into Database - create batch

	def create_batch(conn, %{"people" => people_params}) do
	changesets = Enum.map(people_params, fn class ->
	Person.changeset(%Person{}, person)
	end)

	result = changesets
	\|> Enum.with_index()
	\|> Enum.reduce(Ecto.Multi.new(), fn ({changeset, index}, multi) ->
	Ecto.Multi.insert(multi, Integer.to_string(index), changeset)
	end)

austra / Largest Binary Gap

Last active December 14, 2017 21:23

Largest Binary Gap

	I read about this problem and thought I would try it. Later I found it is a question here too:
	https://codility.com/programmers/lessons/1-iterations/binary_gap/

	My first instinct was, "I know regex can do this, but I hate regex" (Which is also a good reason to get better at regex).
	I couldn't quite hoop the syntax so I moved on. Here is what I came up with:

	def max_binary_gap(n)
	max_gap = 0
	arr = n.to_s(2).chars
	while arr.size > 2 do

takeit / INSTALL.md

Last active September 22, 2024 15:20

Write to NTFS on macOS Sierra (osxfuse + ntfs-3g)

Install osxfuse:

brew cask install osxfuse

Reboot your Mac.
Install ntfs-3g:

Mark Holmberg mark-d-holmberg