Kyle M. Douglass kmdouglass

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) }

How to create a maven repository for your github project step by step

Clone your project in a separate folder

(note: replace ORGANIZATION and PROJECT)

git clone git clone [email protected]:ORGANIZATION/PROJECT.git my-repository

Cd into it

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

	Driver Caps:
	Driver: "omap3"
	Card: "omap3/mt9v032//"
	Bus: ""
	Version: 0.0
	Capabilities: 04000001
	Camera Cropping:
	Bounds: 752x480+0+0
	Default: 752x480+0+0
	Aspect: 1/1

	/**
	* K.jpg's OpenSimplex 2, smooth variant ("SuperSimplex")
	*
	* More language ports, as well as legacy 2014 OpenSimplex, can be found here:
	* https://github.com/KdotJPG/OpenSimplex2
	*/

	public class OpenSimplex2S {

	private static final long PRIME_X = 0x5205402B9270C86FL;

	# Live streaming 2D monochrome image receiver

	# We can start this from python to view images
	# So we get the live image or a current image from Python, and
	# send it to ImageJ through this interface. Boom!

	from ij import IJ
	from ij.process import ByteProcessor, ShortProcessor, LUT

	import jarray

	#!/usr/bin/env python
	#-- coding:utf8 --
	# sources
	# 1. https://gist.github.com/tell-k/4943359#file-paramiko_proxycommand_sample-py-L11
	# 2. https://github.com/paramiko/paramiko/pull/97
	# info: http://bitprophet.org/blog/2012/11/05/gateway-solutions/
	# local -> proxy-server -> dest-server
	# ~/.ssh/config
	#
	# Host proxy-server

	resource "aws_db_instance" "core" {
	username = "postgres"
	password = "changeme"
	...
	}

	resource "null_resource" "master_password" {
	triggers {
	db_host = "${aws_db_instance.address}"
	}

	#!/bin/sh
	# POSIX

	# Reset all variables that might be set
	file=
	verbose=0 # Variables to be evaluated as shell arithmetic should be initialized to a default or validated beforehand.

	while :; do
	case $1 in
	-h\|-\?\|--help) # Call a "show_help" function to display a synopsis, then exit.