John Lin johnlinvc

RKE2 commands

Updated on May 29 to accommodate etcd container not having /bin/sh available anymore.

Install

curl -sL https://get.rke2.io | sh
systemctl daemon-reload
systemctl start rke2-server

Swift Meets C/C++

This gist is a simple example on how to call a function written in swift from C/C++, without taking the detour via Objective-C/C++.

In this example we're going to invoke a function called say_hello, which, as the name already suggests, prints "Hello, World!" to the terminal.

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Async/Await for Swift

Proposal: SE-XXXX
Authors: Chris Lattner, Joe Groff

Introduction

Modern Cocoa development involves a lot of asynchronous programming using closures and completion handlers, but these APIs are hard to use. This gets particularly problematic when many asynchronous operations are used, error handling is required, or control flow between asynchronous calls gets complicated. This proposal describes a language extension to make this a lot more natural and less error prone.

This paper introduces a first class Coroutine model to Swift. Functions can opt into to being async, allowing the programmer to compose complex logic involving asynchronous operations, leaving the compiler in charge of producing the necessary closures and state machines to implement that logic.

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

The Learning Haskell guide has been moved to a git repo to enable outside contribution

Find it here: https://github.com/bitemyapp/learnhaskell

	#!/usr/bin/env ruby

	print "What is the URL of your Apple Downloads resource?\nURL:"
	url = gets.strip

	print "What is the ADCDownloadAuth cookie token:\nADCDownloadAuth: "
	token = gets.strip

	command = "aria2c --header \"Host: adcdownload.apple.com\" --header \"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8\" --header \"Upgrade-Insecure-Requests: 1\" --header \"Cookie: ADCDownloadAuth=#{token}\" --header \"User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 10_1 like Mac OS X) AppleWebKit/602.2.14 (KHTML, like Gecko) Version/10.0 Mobile/14B72 Safari/602.1\" --header \"Accept-Language: en-us\" -x 16 -s 16 #{url} -d ~/Downloads"

	# Notes:
	# You'll need to update any references to 'module.vpc' with your VPC's info (subnets, security groups, etc)
	# If you define your subnets as a map, this will deploy different replicas across availabity zones. Note
	# that the master and first replica will be in the same AZ.
	#
	# Look through the 'connection' fields and update with your bastion_host/key combos
	#

	# Number of IPA Replica(s) to deploy
	variable "ipa_replicas" {

	#
	# Notes:
	#
	# I used the following AMI:
	# "Amazon Linux AMI 2015.09.1 (HVM), SSD Volume Type - ami-60b6c60a"
	# Running on AMI: amzn-ami-hvm-2015.09.1.x86_64-gp2 (ami-60b6c60a)
	#
	# You probably want to use an instance type with a large amount of memory. My first
	# attempt was with a c4.2xlarge but it rant out of memory without using -j option to
	# limit the parallel build.