itshan hanrw

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

Mastering Programming - by Kent Beck

From years of watching master programmers, I have observed certain common patterns in their workflows. From years of coaching skilled journeyman programmers, I have observed the absence of those patterns. I have seen what a difference introducing the patterns can make. Here are ways effective programmers get the most out of their precious 3e9 seconds on the planet. The theme here is scaling your brain. The journeyman learns to solve bigger problems by solving more problems at once. The master learns to solve even bigger problems than that by solving fewer problems at once. Part of the wisdom is subdividing so that integrating the separate solutions will be a smaller problem than just solving them together.

Time

Slicing - Take a big project, cut it into thin slices, and rearrange the slices to suit your context. I can always slice projects finer and I can always find new permutations of the slices that meet different needs

How to use PlantUML with Markdown

PlantUML is a really awesome way to create diagrams by writing code instead of drawing and dragging visual elements. Markdown is a really nice documentation tool.

Here's how I combine the two, to create docs with embedded diagrams.

Step 0: Setup

Get the command-line PlantUML from the download page or your relevant package manager.

	Graph of total commits by month, over last year:

	hg churn -f "%Y-%m" -s -c -d "-365"

	List of my commits over last year:

	hg log -k aras -d "2013-01-01 to 2013-12-31" --template "{short(node)} {user(author)} {firstline(desc)}\n" >mycommits.txt

	My lines changed count over last year (takes ages):

	# Occasionally I want to see the application properties that are pulled down from the Spring Cloud Config service that provides
	# content to our Spring Boot apps. Since I seem to have to re-discover this every time, I figured I'd write it down to help me
	# remember.
	#
	# Additional docs can be found here: https://cloud.spring.io/spring-cloud-config/single/spring-cloud-config.html

	# To see the output in YML format
	curl -u {the user name}:{the user password} http://{the domain:port}/{the application name}-{the spring profile name}.yml

	# For example:

	# NOTE: nvidia-docker must be enabled on the Docker host

	FROM nvidia/cuda:9.0-base-ubuntu16.04
	ENV LANG C.UTF-8

	# adapted from the official tensorflow docker builds [https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/dockerfiles/dockerfiles/devel-gpu.Dockerfile]
	RUN apt-get update && apt-get install -y --no-install-recommends \
	build-essential \
	cuda-command-line-tools-9-0 \
	cuda-cublas-9-0 \

	#301 Redirects for .htaccess

	#Redirect a single page:
	Redirect 301 /pagename.php http://www.domain.com/pagename.html

	#Redirect an entire site:
	Redirect 301 / http://www.domain.com/

	#Redirect an entire site to a sub folder
	Redirect 301 / http://www.domain.com/subfolder/

	# check if job exists
	curl -XGET 'http://jenkins/checkJobName?value=yourJobFolderName' --user user.name:YourAPIToken

	# with folder plugin
	curl -s -XPOST 'http://jenkins/job/FolderName/createItem?name=yourJobName' --data-binary @config.xml -H "Content-Type:text/xml" --user user.name:YourAPIToken

	# without folder plugin
	curl -s -XPOST 'http://jenkins/createItem?name=yourJobName' --data-binary @config.xml -H "Content-Type:text/xml" --user user.name:YourAPIToken

	# create folder

	# Simple way ============================
	function setjdk() {
	if [ $# -ne 0 ]; then
	if [ -n "${JAVA_HOME+x}" ]; then
	removeFromPath "$JAVA_HOME/bin"
	fi

	export JAVA_HOME=`/usr/libexec/java_home -v $@`
	export PATH=$JAVA_HOME/bin:$PATH
	fi

	import org.bouncycastle.util.encoders.Hex;
	import org.web3j.crypto.*;
	import java.math.BigInteger;

	public class ECCExample {

	public static String compressPubKey(BigInteger pubKey) {
	String pubKeyYPrefix = pubKey.testBit(0) ? "03" : "02";
	String pubKeyHex = pubKey.toString(16);
	String pubKeyX = pubKeyHex.substring(0, 64);