Colin MacDonald bluegraybox

bluegraybox / gomodgraph.sh

Created January 18, 2022 17:29

	#!/usr/bin/bash

	function wrapInGraph() {
	# print beginning of DOT file, including formatting commands
	cat <<END
	digraph G {
	rankdir=LR;
	graph [
	K=1.0,
	overlap=false,

bluegraybox / functions.sh

Created May 29, 2019 10:52

	# For reference: 1>&2 redirects output to stderr


	# This script should only be sourced by other scripts
	if [[ "$0" != '-bash' ]] ; then
	echo 'WARNING: functions.sh should be sourced, not executed' 1>&2
	fi

	# Check for an error, and optionally display a message
	function check_ok() {

bluegraybox / bash_multiproc.sh

Last active November 29, 2016 23:40

Process a set of data in N concurrent processes

	#!/usr/local/bin/bash
	# Homebrew bash because macOS standard bash is too old for 'wait -n'.

	max_jobs=10

	data=`seq 1 20`

	# Process to be run in background
	function batch_job() {
	echo "Starting $1"

bluegraybox / find_dupes.rb

Created May 13, 2016 17:09

Ruby script to find duplicate files

bluegraybox / export_osx_contacts.py

Created January 23, 2016 11:12

Script to export contact information from OS X Contacts

	#!/usr/local/bin/python

	from collections import defaultdict
	import pprint
	import sqlite3
	import sys

	ADDRESS_DB_FILE = 'Contacts-2016-01-23.abbu/AddressBook-v22.abcddb'

	def main():

bluegraybox / test.adoc

Last active August 29, 2015 14:17

Asciidoc Sandbox

Demo Page

This is the preamble.

Table of Contents

bluegraybox / parse_indents.hs

Last active May 3, 2020 21:34

script that parses indented text into a tree structure

	import Data.Char
	import qualified Data.String as S
	import System.IO
	import System.Environment

	-- Parses indented text into a tree structure, where each node is represented as a (content, children) tuple
	-- Example invocation:
	-- echo -e "a\n b\n c\n d\n d2\n e\nf\n g\n h\n i\n j\n k\nl\n" \| ./parse_indents
	-- a {b, c {d, d2}, e}, f {g {h {i}}, j, k}, l

bluegraybox / file_io_example.hs

Created November 11, 2013 18:55

Shows how lazy evaluation of hGetContents interacts with the withFile's automatic handle close.

	import Data.Char
	import System.IO

	readFirstLine = withFile "test.txt" ReadMode (\handle -> do
	line <- hGetLine handle
	return line)

	readAndPrintTestFile = withFile "test.txt" ReadMode (\handle -> do
	contents <- hGetContents handle
	-- unless we output contents in some way, it isn't evaluated, and will be empty

bluegraybox / cheat_sheet_ipc.erl

Created August 25, 2012 20:14

Cheat sheet for Erlang IPC syntax & functions

	-module(cheat_sheet_ipc).

	-export([init/0, incr/1, decr/1, current/0]). % not loop/0

	%% Define a constant.
	-define(SVC_NAME, counter_service). % atom, not Variable or string


	%% Start a new process to manage our counter.
	init() ->

bluegraybox / cheat_sheet.erl

Created August 25, 2012 02:41

Cheat sheet for Erlang syntax

	-module(cheat_sheet). % end with a period

	%% Let these functions be called externally.
	-export([countdown/1, countdown/0]). % number of parameters - it matters!

	%% atoms begin with a lower-case letter
	%% Variables begin with an upper-case letter

	%% Start defining a function with the most specific case first
	countdown(0) ->