larshei’s gists

larshei / install_docker.sh

Last active March 13, 2025 10:30

	# install docker in WSL
	for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done

	sudo apt install ca-certificates curl
	sudo install -m 0755 -d /etc/apt/keyrings
	sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
	sudo chmod a+r /etc/apt/keyrings/docker.asc

	echo \
	"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \

larshei / LeafletMap.ex

Created September 19, 2023 19:58

Leaflet Map as Elixir Phoenix LiveView Component

	defmodule Components.LeafletMap do
	use Phoenix.Component

	attr :class, :string, default: nil

	def map(assigns) do
	~H"""
	<div style="overflow: hidden" phx-update="ignore" id="mapcontainer">
	<div class={@class} phx-hook="Map" id="mapid"></div>
	</div>

larshei / grep_from_dict

Last active September 18, 2020 12:57

	#!/bin/bash

	# search pattern in linux/mac dictionary. Store findings to file.

	word_endings=(
	".*kee"
	".*key"
	".*ky"
	".*que"
	".*ki"

larshei / fifo_buffer_test.c

Last active March 2, 2023 09:30

"test" and usage demonstration for fifo_buffer.c gist: https://gist.github.com/larshei/cec020e037b0ebd103ef6252977f8b12

	/* ===========================================================================
	* Lars Heinrichs, 2020
	* Feel free to use this piece of code as desired. Provided as is, with no
	* guarantees.
	*
	* "Tests" (in quotes!) for
	* https://gist.github.com/larshei/cec020e037b0ebd103ef6252977f8b12
	* Verifies basic behaviour.
	*
	* Use the gist above if you quickly need a ring buffer and do not care about

larshei / fifo_buffer.c

Last active March 2, 2023 09:30

Tired of writing the same buffer functions all the time? not interested in setting up some fully blown buffer system? here you go. Quick and dirty fifo and ring buffer implementation in C as a single source file "include". Test and example usage at https://gist.github.com/larshei/444ecee2a90174757b49ac1fe85f604a

	/* ============== FIFO BUFFER ============================================== */
	/* After writing another small fifo buffers the 100th time, I created this gist.
	* It is a QUICK AND DIRTY solution to get the standard functions of a fifo, namely
	* - add and read elements
	* - check if empty
	* - reset
	*
	* ============== USAGE ======================================================
	* 1. #define the FIFO_DATA_TYPE, FIFO_BUFFER_SIZE and FIFO_MEMORY.
	* 2. Optionally: define FIFO_OVERWRITE_WHEN_FULL for ring buffer like behaviour

larshei / compare_divide_multiply_pointer_index.c

Last active May 17, 2020 01:05

This is just to give you an idea of the times required to perform the same action in different ways.

	// compare times rquired for multiply and divide as well as pointer and array index addressing.
	// e.g. from a small port to an STM32F4:
	// Required times to scale the 1000 values to max=1.0 for 8192 times:
	// Multiply, pointers: 14400
	// Multiply, index: 15938
	// Divide , pointers: 21077
	// Divide , index: 19530
	// The difference is actually a lot smaller than I expected.

	#include <time.h>

larshei / .clang-format

Created May 13, 2020 07:26

My default config for .clang-format. Place this in e,g, the root folder of your project. May be used by e.g. Visual Code to autoformat code sections or whole files.

	# =========== C / Cpp ==============
	Language: Cpp
	TabWidth: 4
	IndentWidth: 4
	UseTab: Never
	AlignAfterOpenBracket: true
	AlignConsecutiveAssignments: true
	AlignConsecutiveDeclarations: true
	# AlignConsecutiveMacros: true # not working 'unknown key' error
	AlignEscapedNewlines: Left

larshei / ceedling.yaml

Last active March 2, 2023 09:28

Ceedling for Github Actions

	name: Ceedling Unit Test

	on:
	push:
	branches: [ master, develop ]
	pull_request:
	branches: [ master, develop ]

	jobs:
	test:

Lars Heinrichs larshei