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tauzen / barber.clj
Created Jul 27, 2019
7 languages in 7 weeks, Clojure day 3, sleeping barber
View barber.clj
(def cut-count (atom 0))
(def client-count (atom 0))
(def cutting (atom false))
(def client-approaching (atom false))
(def client-queue (atom []))
(defn cut [client-id]
(reset! cutting true)
tauzen /
Last active Mar 28, 2017
Python DDD - Value Object idea. Immutable attributes, methods, structural equality.
from collections import namedtuple
class Money(namedtuple('Money', ['amount', 'currency'])):
def add(self, amount):
return Money(self.amount + amount, self.currency)
m = Money(20, 'USD')
# Money(amount=20, currency='USD')

Keybase proof

I hereby claim:

  • I am tauzen on github.
  • I am tauzen ( on keybase.
  • I have a public key whose fingerprint is 6F3E 6BAF 57AD 3CE1 97B1 FE0B C429 5266 1A58 88BD

To claim this, I am signing this object:

tauzen / openssl
Last active Mar 26, 2017
openssl keys and cert generation, signed digest generation, verification of signed digest
View openssl
# Creating a RSA private key
$ openssl genrsa -out rsaprivkey.pem 1024
# Creating a cert file from priv key
$ openssl req -new -x509 -key rsaprivkey.pem -out rsacert.pem
# Converting from PEM to DER
$ openssl x509 -outform der -in rsacert.pem -out rsacert.der
# Convertin from DER to PEM
tauzen / joinUint8Arrays.js
Created Oct 28, 2014
Joins multiple Uint8Arrays (or regular Arrays) passed as arguments into one combined Uint8Array.
View joinUint8Arrays.js
function joinUint8Arrays() {
var args =;
var length = args.reduce(function(a, b) { return a + b.length; }, 0);
var out = new Uint8Array(length);
args.reduce(function(previousLen, buffer) {
out.set(buffer, previousLen);
return previousLen + buffer.length;
}, 0);
tauzen / hexstring.js
Last active Sep 5, 2019
Hex string to byte and other way round conversion functions.
View hexstring.js
function byteToHexString(uint8arr) {
if (!uint8arr) {
return '';
var hexStr = '';
for (var i = 0; i < uint8arr.length; i++) {
var hex = (uint8arr[i] & 0xff).toString(16);
hex = (hex.length === 1) ? '0' + hex : hex;
hexStr += hex;
tauzen / app.js
Last active Aug 29, 2015
FirefoxOS tag writing example, requires NFC capable device running FirefoxOS 2.1. App needs to be certified! Privileged APIs comming soon!
View app.js
window.addEventListener('DOMContentLoaded', function() {
'use strict';
console.log('DOMContentLoaded, checking for NFC');
if (!navigator.mozNfc) {
console.log('NFC not available');
navigator.mozSetMessageHandler('activity', (activity) => {
tauzen /
Last active Aug 29, 2015
Setting NFC debug_all = true without gecko rebuild
$ adb remount
$ adb pull /system/b2g/omni.ja
$ unzip omni.ja -d Omni
$ sed -i 's/this.DEBUG_ALL = false;/this.DEBUG_ALL = true;/g' Omni/modules/nfc_consts.js
$ cd Omni
$ zip -r omni.ja *
$ adb push omni.ja /system/b2g
$ adb reboot
tauzen / acl.conf.xml
Created Mar 29, 2014
Domains ACL definition in freeswitch/conf/autoload_configs/acl.conf.xml with static gw address.
View acl.conf.xml
<list name="domains" default="deny">
<node type="allow" domain="$${domain}"/>
<node type="allow" cidr=""/>
tauzen / default.xml
Created Mar 29, 2014
Freeswitch demo ivr definition in freeswitch/conf/dialplan/default.xml
View default.xml
<extension name="ivr_demo">
<condition field="destination_number" expression="^5000$">
<action application="answer"/>
<action application="sleep" data="2000"/>
<action application="ivr" data="demo_ivr"/>
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