Jan Weitz weitzj

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
L2 cache reference ........................... 7 ns                     14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns                     20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory

A lot of these are outright stolen from Edward O'Campo-Gooding's list of questions. I really like his list.

I'm having some trouble paring this down to a manageable list of questions -- I realistically want to know all of these things before starting to work at a company, but it's a lot to ask all at once. My current game plan is to pick 6 before an interview and ask those.

I'd love comments and suggestions about any of these.

I've found questions like "do you have smart people? Can I learn a lot at your company?" to be basically totally useless -- everybody will say "yeah, definitely!" and it's hard to learn anything from them. So I'm trying to make all of these questions pretty concrete -- if a team doesn't have an issue tracker, they don't have an issue tracker.

I'm also mostly not asking about principles, but the way things are -- not "do you think code review is important?", but "Does all code get reviewed?".

WARNING: If you're reading this in 2021 or later, you're likely better served by reading:

(This gist was created in 2013 and targeted the legacy GOPATH mode.)

$ ssh -A vm
$ git config --global url."[email protected]:".insteadOf "https://github.com/"

Frontend Development

Attention: the list was moved to

https://github.com/dypsilon/frontend-dev-bookmarks

This page is not maintained anymore, please update your bookmarks.

	FROM ubuntu:13.10

	RUN apt-get update

	RUN DEBIAN_FRONTEND=noninteractive apt-get -y install golang

	RUN mkdir /go
	RUN export GOPATH=/go
	ENV GOPATH /go
	RUN export PATH=$PATH:$GOPATH/bin

	import android.annotation.SuppressLint;
	import android.content.Context;
	import android.util.Log;

	import retrofit.client.Client;
	import retrofit.client.Header;
	import retrofit.client.Request;
	import retrofit.client.Response;
	import retrofit.mime.TypedInput;

	FROM ubuntu

	RUN apt-get -y install wget tar ca-certificates
	RUN wget https://s3.amazonaws.com/bitly-downloads/nsq/nsq-0.2.23.linux-amd64.go1.1.2.tar.gz
	RUN tar zxvf nsq-0.2.23.linux-amd64.go1.1.2.tar.gz
	RUN mkdir -p /usr/local/bin
	RUN cp /nsq-0.2.23.linux-amd64.go1.1.2/bin/nsqd /usr/local/bin

	RUN mkdir -p /data
	VOLUME ["/data"]

	all: srv.c
	g++ srv.c /home/eerihug/dev/BakkaLinux/root/usr/local/lib/libzmq.a -lpthread -lrt -o srv
	g++ cli.c /home/eerihug/dev/BakkaLinux/root/usr/local/lib/libzmq.a -lpthread -lrt -o cli

	clean:
	rm cli
	rm srv

	package main

	import (
	"database/sql"
	"github.com/mattn/go-sqlite3"
	"log"
	"os"
	)

	func runQuery(db *sql.DB, query string) {