Kaid Wong kaid

Swift Concurrency Manifesto

PCI Passthrough

Warning: unfinished (but successfull!)

I did PCI passthrough on Archlinux and Debian with the old PCI-stub method (this was pre-4.0 era). And later I did PCI passthrough on the 4.1+ kernels on Arch and Ubuntu (16.10 I think?).

This is my attempt at doing the same on Nixos.

Requirements

Why I think Immediate Mode GUI is way to go for GameDev tools

Prerequisites

Before you continue, if you don't know what IMGUI is don't bother reading this post, just ignore it, don't write anything in comments section, etc. If you're curious about IMGUI see bottom of this post, otherwise continue whatever you were doing, this post it's not for you. Thanks!

If you know what IMGUI is, for context read following presentations and blog posts:

Insomniac’s Web Tools Postmortem

Rails Fuzzy Match

纠错算法

英文纠错

拼写错误
错别字

Levenshtein, n-gram
pg_trgm
select similarity('yue mian ke ji', 'yu mian ke ji')
fuzzystrmatch

Cryptographic Best Practices

Putting cryptographic primitives together is a lot like putting a jigsaw puzzle together, where all the pieces are cut exactly the same way, but there is only one correct solution. Thankfully, there are some projects out there that are working hard to make sure developers are getting it right.

The following advice comes from years of research from leading security researchers, developers, and cryptographers. This Gist was [forked from Thomas Ptacek's Gist][1] to be more readable. Additions have been added from

Zone Motivation

Make writing asynchronous code easier by having a consistent way of propagating "context" across related asynchronous operations. Have the "context" be responsible for async-local-storage, allowing the execution before and after hooks, and "context"-local error handling. Finally make sure that the "context"s are composable.

This feature needs to be part of the platform so that library and framework authors can relay on a common well know API, otherwise adoption will be limited.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	# MIT License
	#
	# Copyright (c) 2018, Zane Claes
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	# copies of the Software, and to permit persons to whom the Software is
	# furnished to do so, subject to the following conditions:

	# curl -LO http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.3/releases/x86_64/alpine-3.3.1-x86_64.iso
	curl -LO http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.3/releases/x86/alpine-3.3.1-x86.iso

	# create hdd image (8GB)
	dd if=/dev/zero of=hdd.img bs=1g count=8

	# extract kernel and initramfs
	brew install cdrtools
	isoinfo -i alpine-3.3.1-x86.iso -J -x /boot/initramfs-grsec > initramfs-grsec
	isoinfo -i alpine-3.3.1-x86.iso -J -x /boot/vmlinuz-grsec > vmlinuz-grsec

	#!/bin/sh

	# PROVIDE: caddy
	# REQUIRE: LOGIN
	# KEYWORD: shutdown

	# Documentation=https://caddyserver.com/docs
	# add php-fpm to REQUIRE to run php/fastcgi processes

	# Add the following lines to /etc/rc.conf to enable caddy: