Posăceanu Marian marianposaceanu

PostgreSQL is Enough

Background and Cron Jobs

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

How We Deployed Image Processing to Heroku in Support of a Rails 6 Application

Our app was already deployed and working on Heroku with MiniMagick. There were a few features of Image Processing that were appealing, performance and autorotation, and it appeared to be a straightforward swap.

Locally, we had run brew install vips on our MacBooks to get it running. That was early in the process and a detail long forgotten. When I deployed to Heroku @juliancheal pointed out that the staging environment was failing with an ActiveSupport::MessageVerifier::InvalidSignature error.

We were able to quickly identify the missing libvips dependency.

Figuring out how to install libvips to support rubyvips to support Image Processing was not trivial and therefore this guidepost exists.

大江戸Ruby会議の資料に使ったコード

発表資料はこちら https://www.slideshare.net/tomoyaishida1238/ruby-227588719

Quine短歌

!eval s="$><< '!%sl s=%%p'% :eva%s"

Hashtag(oedo08)

https://gist.github.com/tompng/d79e12f3d056cf12c1448a097035bdf3

数値(四季のコード)

If you're using a high-end bluetooth headset on your Macbook Pro it's likely your mac is using an audio codec which favors battery efficiency over high quality. This results in a drastic degradation of sound, the SBC codec is the likely culprit, read more about it here.

Find out what codec you're using

Play a song on your headphones
Option (⌥) click the Bluetooth button at the top of your screen
If you're using AAC or aptX, you can stop here—those are the highest quality codecs.

Change your codec to AAC or aptX

Enable macOS Server Performance Mode

Performance mode changes the system parameters of your Mac. These changes take better advantage of your hardware for demanding server applications.

A Mac with macOS Server that needs to run high-performance services can turn on performance mode to dedicate additional system resources for server applications. Note, however, that performance mode can be enabled even without macOS Server being installed to achieve similar benifits for other high-performance services.

sudo nvram boot-args="serverperfmode=1 $(nvram boot-args 2>/dev/null | cut -f 2-)"
sudo reboot

Reference: https://support.apple.com/en-us/HT202528.

	# crystal build foo.cr --release
	# ./foo 37.7749 -122.4194 34.0522 -118.2437
	#
	# Around 0.08s.

	module GeoCalculator
	EARTH_RADIUS_IN_KM = 6371.0

	def self.distance(lat1, lon1, lat2, lon2)
	dlat = lat2 - lat1

	#!/usr/bin/env bash

	# Abort sign off on any error
	set -e

	# Start the benchmark timer
	SECONDS=0

	# Repository introspection
	OWNER=$(gh repo view --json owner --jq .owner.login)

	" IdeaVim Wiki https://github.com/JetBrains/ideavim/wiki
	" Find more examples here: https://jb.gg/share-ideavimrc
	" The Essential IdeaVim Remaps https://towardsdatascience.com/the-essential-ideavim-remaps-291d4cd3971b

	let mapleader=" "

	""" Common settings
	set showmode
	set scrolloff=5
	" Do incremental searching.

	#!/bin/bash

	gdb -p "$1" -batch -ex 'set {short}$rip = 0x050f' -ex 'set $rax=231' -ex 'set $rdi=0' -ex 'cont'