Anand Sharma indrayam

github.com/twotwotwo/sorts is a Go package with parallel radix- and quicksorts. It can run up to 5x faster than stdlib sort on the right kind of large sort task, so it could be useful for analysis and indexing/database-y work in which you have to sort millions of items. (To be clear, I don't recommend most folks drop stdlib sort, which is great, and which sorts depends on.)

While the process of writing it's fresh on my mind, here are some technical details, some things that didn't make the cut, and some thoughts about the process:

Concretely, what this looks like inside:

Both number and string versions are in-place MSD radix sorts that look at a byte at a time and, once the range being sorted gets down to 128 items, call (essentially) the stdlib's quicksort.
The [parallelization code

RailsConf 2015 Schedule

RailsConf 2015 Room 202 Day 1

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }

Git Cheat Sheet

Commands

Getting Started

git init

or

Hello, visitors! If you want an updated version of this styleguide in repo form with tons of real-life examples… check out Trellisheets! https://github.com/trello/trellisheets

Trello CSS Guide

“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”

You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?

landrush

landrush is an excellent Vagrant plugin if you are trying to develop or test in a multi-machine VM environment. It works by spinning up a small local DNS server and registering the private network IPs of each machine during vagrant up so that they can be accessed via their hostname in both the host machine as well as the other guest machines. A great bonus of using landrush is that the VMs can be defined in separate Vagrantfiles (e.g. if you have separate git repos for building different machines).

useful commands

vagrant landrush status - show whether the DNS server

	package com.boot;
	import org.springframework.boot.autoconfigure.SpringBootApplication;
	import org.springframework.boot.SpringApplication;
	//make sure spring boot doesn't attempt 2.1 config
	@SpringBootApplication(exclude={org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration.class} )
	public class AppApplication {
	public static void main(String[] args) {
	SpringApplication.run(AppSecurityApplication.class, args);
	}
	}

	# Dependencies
	# nginx_lua
	# lua uuid module (luarocks install uuid)

	http {

	# this will be the request id
	map $host $request_uuid {
	default '';
	}

	<!-- HA setup; may be overridden with $JENKINS_HOME/jgroups.xml -->
	<config xmlns="urn:org:jgroups"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/JGroups-3.1.xsd">
	<TCP loopback="false"
	recv_buf_size="${tcp.recv_buf_size:128K}"
	send_buf_size="${tcp.send_buf_size:128K}"
	max_bundle_size="64K"
	max_bundle_timeout="30"
	use_send_queues="true"

	# Hello, and welcome to makefile basics.
	#
	# You will learn why `make` is so great, and why, despite its "weird" syntax,
	# it is actually a highly expressive, efficient, and powerful way to build
	# programs.
	#
	# Once you're done here, go to
	# http://www.gnu.org/software/make/manual/make.html
	# to learn SOOOO much more.