Juan-Carlos Foust kharmabum

kubectl multi-version brews

The instructions below apply to older versions of Homebrew which still provide switch capability.

For current Homebrew, you'll likely need to keep Versions around, and build locally. Here's my versions repository https://github.com/rdump/homebrew-versions

MacPorts is now keeping versioned installations available as well, by default.

Differential Dataflow - The code is ugly Rust, but the logic and linked papers are quite interesting.
Spinning Fast Iterative Dataflows - Flink's execution model. Also, coverage in the Morning Paper.
Discretized Streams - Spark Streaming's model of operation.
Google's Dataflow Model - This is now also available as Apache (Incubating) Beam.
Kafka Streams - Kafka offers "hipster stream processing," and a nice unification between tables and streams.

Prerequisites:

One or more clients running a UNIX-like OS. Examples are given for Ubuntu 12.04 LTS, although all software components are available for other platforms as well (e.g. OS X). YMMV
A cheap Ubuntu 12.04 VPS with storage. I recommend Backupsy, they offer 250GB storage for $5/month. Ask Google for coupon codes.

Software components used:

	# Basic benchmarks
	# SET key val # 87489.06
	# SETRANGE key2 6 "Redis" # 75757.58 req/s
	# INCR key 245 # 70224.72 req/s
	# INCRBY key 245 22 # 67114.09 req/s
	# EVAL SET key val # 46296.29 req/s

	# SETIFHIGHER (set or update key if new value is higher than current) # 41666.67 req/s
	# if not exists return OK , if updated return the increment , if not updated return 0
	SCRIPT LOAD "local c = tonumber(redis.call('get', KEYS[1])); if c then if tonumber(ARGV[1]) > c then redis.call('set', KEYS[1], ARGV[1]) return tonumber(ARGV[1]) - c else return 0 end else return redis.call('set', KEYS[1], ARGV[1]) end"

	import Foundation

	/// An action that will get executed after a certain amount of
	/// time, if the object is still alive. If the object gets
	/// deinited before the provided time, the action will never
	/// get executed.
	class DebouncedAction {

	private let action: ()-> Void
	private var onCancel: (()-> Void)?

	//
	// GIF2MP4.swift
	//
	// Created by PowHu Yang on 2020/4/24.
	// Copyright © 2020 PowHu Yang. All rights reserved.
	//

	/* How to use
	let data = try! Data(contentsOf: Bundle.main.url(forResource: "gif", withExtension: "gif")!)
	let tempUrl = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("temp.mp4")

	# The trick is to link the DeviceSupport folder from the beta to the stable version.
	# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

	# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
	sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

	# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

	# (A similar approach works for older versions too, just change the version number after DeviceSupport)