Aldo Fathoni fathonix

My thoughts on MessagePack

Hi. My name is Sadayuki "Sada" Furuhashi. I am the author of the MessagePack serialization format as well as its implementation in C/C++/Ruby.

Recently, MessagePack made it to the front page of Hacker News with this blog entry by Olaf, the creator of the Facebook game ZeroPilot. In the comment thread, there were several criticisms for the blog post as well as MessagePack itself, and I thought this was a good opportunity for me to address the questions and share my thoughts.

My high-level response to the comments

To the best of my understanding, roughly speaking, the criticisms fell into the following two categories.

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

Quick access

The Dao of Functional Programming

2026

February

The Cancel-Correct Async Runtime.

Structured concurrency with first-class cancellation for Rust. Three-phase cancel protocol, linear obligations, capability security, and deterministic testing — all enforced by the runtime.
Code: The Hidden Language of Computer Hardware and Software — Interactive Illustrations

>

Set Icon to a File / Folder on macOS

Since macOS High Sierra sips --addIcon is no longer supported. An easier way to add and image to a file/folder is to use fileicon npm package.

The new syntax is:

fileicon set foo img.png

GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd

The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.

-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

	#!/bin/sh

	# ntfs_attr.sh - Display or change attributes on an NTFS filesystem

	# Tools required:
	# getfattr(1) and setfattr(1)
	# http://savannah.nongnu.org/projects/attr/
	# (In Debian/Ubuntu: sudo apt-get install attr)
	# ntfs-3g (pre-installed in most Linux distros)
	# http://www.tuxera.com/community/ntfs-3g-download/

	# ~/.asoundrc or /etc/asound.conf
	# ALSA configuration file

	##### USAGE #####
	# Save this file as "~/.asoundrc" (for user-specific sound configuration) or
	# "/etc/asound.conf" (for system-wide sound configuration) and specify ALSA
	# device names ad described in the next section.


	##### DEVICE NAMES #####

	Name,Full name,Description,Location,Coordinates,URL,Version,DNSSEC validation,No logs,Namecoin,Resolver address,Provider name,Provider public key,Provider public key TXT record
	adamas,Adamas.ai DNSCrypt,DNSCrypt Server in LUX provided by adamas.ai,Luxembourg,,http.//adamas.ai,1,no,yes,no,80.90.43.162:5678,2.dnscrypt-cert.adamas.ai,6484:544A:4B91:F23A:E8AD:2AA3:6661:C419:D09B:C88D:B1AF:C314:E59D:2C36:0F81:FB99,
	cisco,Cisco OpenDNS,Remove your DNS blind spot,Anycast,,https://www.opendns.com,1,no,no,no,208.67.220.220:443,2.dnscrypt-cert.opendns.com,B735:1140:206F:225D:3E2B:D822:D7FD:691E:A1C3:3CC8:D666:8D0C:BE04:BFAB:CA43:FB79,
	cisco-familyshield,Cisco OpenDNS with FamilyShield,Blocks web sites not suitable for children,Anycast,,https://www.opendns.com/home-internet-security/parental-controls/,1,no,no,no,208.67.220.123:443,2.dnscrypt-cert.opendns.com,B735:1140:206F:225D:3E2B:D822:D7FD:691E:A1C3:3CC8:D666:8D0C:BE04:BFAB:CA43:FB79,
	cisco-ipv6,Cisco OpenDNS over IPv6,Cisco OpenDNS IPv6 sandbox,Anycast,,https://www.

	https://code.google.com/p/android/issues/detail?id=32696#c5

	If you have a certificate that is not
	trusted by Android, when you add it, it goes in the personal cert store.
	When you add a cert in this personal cert store, the system requires a
	higher security level to unlock the device. But if you manage to add your
	cert to the system store then you don't have this requirement. Obviously,
	root is required to add a certificate to the system store, but it is quiet
	easy.