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joelittlejohn / .bash_profile_snippet.sh
Last active June 18, 2020 11:25
Once-per-week rotation of AWS keys stored by aws-vault (alternative to crontab, useful for keychain access)
[ "$(find ~/.rotate -mtime -7 2>/dev/null)" ] || (for p in $(aws-vault list --profiles | grep -v default | grep -v mfa); do aws-vault rotate -n $p; done && touch ~/.rotate)
<?php
$wgExtensionCredits['parserhook'][] = array(
'name' => 'WebServiceSequenceDiagram',
'version' => '1.0',
'author' => 'Eddie Olsson',
'url' => 'http://www.mediawiki.org/wiki/Extension:WebSequenceDiagram',
'description' => 'Render inline sequence diagrams using websequencediagrams.com'
);
if ( defined( 'MW_SUPPORTS_PARSERFIRSTCALLINIT' ) ) {
@joelittlejohn
joelittlejohn / test.clj
Last active July 3, 2023 21:08
Dynamically generate clojure.test deftests (and other tricks)
(ns dynamic.test
(:require [clojure.test :refer :all]))
;; This example shows how tests can be generated dynamically, by
;; creating new vars with the correct metadata.
(defn add-test
"Add a test to the given namespace. The body of the test is given as
the thunk test-fn. Useful for adding dynamically generated deftests."
[name ns test-fn & [metadata]]

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@joelittlejohn
joelittlejohn / staqueue.clj
Last active August 29, 2015 13:56
The Staqueue, Coding for Interviews Issue #20
;; Building a functional queue using two stacks
;; We'll use vectors for our stacks, 'push' == conj
(def ^:private push conj)
;; We'll need be able to fill one stack from another
(defn ^:private refill
[s1 s2]
(if (empty? s1)
s2
@joelittlejohn
joelittlejohn / base62-id.clj
Last active December 26, 2015 21:39
Create base62 ids with 64-bit entropy in Clojure
(let [digits (into [] (map char (concat (range 48 58) (range 65 91) (range 97 123)))) ;; 0-9,A-Z,a-z
base (biginteger (count digits))
entropy 64]
(defn id []
(loop [id10 (BigInteger. entropy (java.security.SecureRandom.))
id62 ""]
(if (and (<= id10 (BigInteger/ZERO)) (seq id62))
id62
(let [[d r] (.divideAndRemainder id10 base)]
(recur d (str id62 (digits (.intValue r)))))))))
@joelittlejohn
joelittlejohn / merge_ascii.clj
Created July 31, 2013 19:02
Merge two ascii (art) files like image layers, treating spaces as transparent.
(ns merge-ascii
(:require [clojure.java.io :refer [reader writer]]))
(defn choose-char [a b]
(cond (nil? a) b
(nil? b) a
(not= b \space) b
:else a))
(defn merge [a b out]
@joelittlejohn
joelittlejohn / generate-changelog.sh
Last active March 4, 2021 18:50
Instant CHANGELOG.md from your GitHub issues
#!/usr/bin/env bash
# Generates this kind of thing:
# https://github.com/joelittlejohn/jsonschema2pojo/blob/master/CHANGELOG.md
#
# If your issue has 'breaking' label, the issue will be shown in the changelog with bold text
#
# All versions of this script are dedicated to the Public Domain, no rights reserved,
# as per https://creativecommons.org/publicdomain/zero/1.0/
#
if [ "$#" -ne 2 ]; then
@joelittlejohn
joelittlejohn / bots.clj
Last active December 19, 2015 00:19 — forked from cgrand/bots.clj
Add joebot
;; joebot
(ns tron.bots
(:require [tron.core :as tron]))
(defn empty-look
"A mock look function which just checks for the arena
boundaries."
[pos]
(when-not (tron/valid-pos? pos) :wall))
@joelittlejohn
joelittlejohn / generate-contributors.sh
Created May 22, 2013 22:08
Instant CONTRIBUTORS.md from your git log
echo "# Contributors" > CONTRIBUTORS.md && git log --pretty=tformat:"* %an <%ae>" | tac | awk ' !x[$0]++' >> CONTRIBUTORS.md