bluegraybox

#!/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

# 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

#!/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

#!/usr/bin/ruby -w

require 'find'
require 'md5'

dir = ARGV[0]
dir = "." unless dir

digests = {}
Find.find( dir ) do |f|

bluegraybox

#!/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

Demo Page

This is the preamble.

Table of Contents

• Summary / Key Features

Summary / Key Features

• single quotes

bluegraybox

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

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

-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

-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) ->