schollz / HaversinFormula.go

Created November 7, 2017 17:23 — forked from cdipaolo/HaversinFormula.go

Golang functions to calculate the distance in meters between long,lat points on Earth.

	// haversin(θ) function
	func hsin(theta float64) float64 {
	return math.Pow(math.Sin(theta/2), 2)
	}

	// Distance function returns the distance (in meters) between two points of
	// a given longitude and latitude relatively accurately (using a spherical
	// approximation of the Earth) through the Haversin Distance Formula for
	// great arc distance on a sphere with accuracy for small distances
	//

schollz / docker-cleanup-resources.md

Created December 14, 2017 12:34 — forked from bastman/docker-cleanup-resources.md

docker cleanup guide: containers, images, volumes, networks

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

schollz / ttldict.py

Created December 28, 2017 11:44 — forked from pythonhacker/ttldict.py

A Python dictionary type with keys having specific time to live (TTL)

	import threading
	import time

	class TTLDict(dict):
	""" A dictionary with keys having specific time to live """

	def __init__(self, ttl=5):
	self._ttl = ttl
	# Internal key mapping keys of _d
	# to times of access

schollz / bluetooth.sh

Created February 17, 2018 20:53 — forked from RamonGilabert/bluetooth.sh

Bluetoothctl automation

	#!/usr/bin/expect -f

	set prompt "#"
	set address [lindex $argv 0]

	spawn sudo bluetoothctl -a
	expect -re $prompt
	send "remove $address\r"
	sleep 1
	expect -re $prompt

schollz / unfix-all-the-toolbars.user.js

Created March 4, 2018 23:57

GreaseMonkey script to remove "position: fixed" from webpages

	// ==UserScript==
	// @name unfix-all-the-toolbars
	// @description Removes "position: fixed" style from elements, unfixing "toolbars" and the such.
	// @namespace http://inf.ufrgs.br/~vbuaraujo/
	// @include *
	// @version 1.2
	// @grant none
	// ==/UserScript==

schollz / main.go

Created June 25, 2018 02:11 — forked from dopey/main.go

How to generate secure random strings in golang with crypto/rand.

	package main

	import (
	"crypto/rand"
	"encoding/base64"
	"fmt"
	"io"
	)

	// Adapted from https://elithrar.github.io/article/generating-secure-random-numbers-crypto-rand/

schollz / chanhopper.sh

Created August 8, 2018 14:26 — forked from hit0ri/chanhopper.sh

Wi-Fi channel hopper

	#!/bin/bash

	msg() {
	printf -- '%s\n' "$@"
	}

	err() {
	printf -- 'error: %s\n' "$@" >&2
	exit 1
	}

schollz / udp_client.go

Created December 20, 2019 18:05 — forked from reterVision/udp_client.go

A dummy UDP hole punching sample in Go

	package main

	import (
	"encoding/json"
	"fmt"
	"log"
	"net"
	"os"
	"time"
	)

schollz / camphor.scss

Created May 5, 2020 16:15 — forked from bdno86/camphor.scss

camphor

$camphor300:'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

schollz / script-template.sh

Created December 15, 2020 15:40 — forked from m-radzikowski/script-template.sh

Minimal safe Bash script template - see the article with full description: https://betterdev.blog/minimal-safe-bash-script-template/

	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

Zack schollz

Docker - How to cleanup (unused) resources

delete volumes