Hirohisa Mitsuishi bongole

Ruby 3.1 on Rails

Actions required to use Ruby 3.1.0 with Rails

Rails 7.0.Z

Rails 7.0.1 is compatible with Ruby 3.1.0.
Rails 7.0.1 addes net-smtp, net-imap and net-pop gems as Action Mailbox and Action Mailer dependency, you do not need to add them explicitly in your application Gemfile anymore.
thor 1.2.1 has been released. You will not see DidYouMean::SPELL_CHECKERS.merge deprecate warnings anymore.

Rails 6.1.Z

Use Rails 6.1.5 to support database.yml with aliases and secrets.yml with aliases.

Emscripten as a linker for Zig and C

This shows how to build a nontrivial program using Zig+Emscripten or C+Emscripten. In both cases Emscripten is only used as a linker, that is the frontend is either zig or clang.

"Nontrivial" here means the program uses interesting Emscripten features:

Asyncify
Full GLES3 support
GLFW3 support

tsconfig.json の設定についてのメモ書きです。

Node.jsのバージョンごとの設定

target は変換後のコードのECMAScriptバージョンを指定するたとえば、Node.js 14はES2020をサポートしている。そのため、Node.js 14向けのコード(サーバなど)ならtarget: "ES2020"を指定することで、余計なTranspileが省かれててコードサイズや実行時間が最適化される。

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

play-audio-mic.sh

This script was adapted to allow you to play audio files through your microphone input. It does so by creating a virtual microphone and piping an audio file to it.

The work was mostly done in this StackOverflow answer, I just adapted it to use ffmpeg and add a trap to cleanup on exit.

Requirements:

ffmpeg
Bash
PulseAudio/pactl

ISUCONのベンチマーカーとGo

catatsuy メルカリSRE

mercari.go #11 - connpass https://mercari.connpass.com/event/148913/

ISUCONとは

http://isucon.net

	# This script will explain how to transfer a file to EC2 using SSM ONLY!

	# You will need to have permission to run SSM commands on the target machine and have sudo access as well

	# Infos
	INSTANCE_ID=i-1234567890
	FILE_NAME=the_file.tar.gz

	# Step 1: Run command on machine to install netcat and dump from port to filename
	# < Start session


	// when T is any\|unknown, Y is returned, otherwise N
	type IsAnyUnknown<T, Y, N> = unknown extends T ? Y : N;

	// when T is never, Y is returned, otherwise N
	type IsNever<T, Y = true, N = false> = [T] extends [never] ? Y : N;

	// when T is a tuple, Y is returned, otherwise N
	// valid tuples = [string], [string, boolean],
	// invalid tuples = [], string[], (string \| number)[]

	apt install flex bison
	git clone https://github.com/microsoft/WSL2-Linux-Kernel --depth 1
	cd WSL2-Linux-Kernel/tools/perf
	make -j8
	sudo cp perf /usr/local/bin

	import {
	FirebaseAnalyticsJSCodedEvent,
	FirebaseAnalyticsJSConfig,
	FirebaseAnalyticsJSOptions,
	} from './FirebaseAnalyticsJS.types';

	/**
	* A pure JavaScript Google Firebase Analytics implementation that uses
	* the HTTPS Measurement API 2 to send events to Google Analytics.
	*