Michal Těhník MicTech

Change location of hosts file

create your own ansible.cfg

[defaults]  
inventory = /path/to/hosts

Ping all hosts

Keybase proof

I hereby claim:

I am mictech on github.
I am mictech (https://keybase.io/mictech) on keybase.
I have a public key whose fingerprint is 7FE5 8B6F 1BD6 DC59 9AD4 7F54 932D 02C8 5E02 FE7F

To claim this, I am signing this object:

Note: This is a submission for a Reactive2015 lightning talk. If you'd like to see a lightning talk about this (or read a detailed blog post if you are not going for the conference), vote for it by starring this gist! Thanks a lot!

Advanced React.js Performance

Performance is one of the reasons why React.js is so popular for building complex, highly interactive web applications. It became the go-to library for developers who don’t like to make compromises for technical reasons when building awesome user experiences. However even with React.js it still can be easy to hit it’s performance limits.

In this lightning talk Daniel will go beyond the basics of shouldComponentUpdate and immutable data structures and will discuss how to correctly instrument, measure and optimize performance in complex React apps. He will help you understand the overhead of different parts of the React component lifecycle, how some of it’

Most active GitHub users (git.io/top)

The count of contributions (summary of Pull Requests, opened issues and commits) to public repos at GitHub.com from Tue, 06 Dec 2016 17:06:46 GMT till Wed, 06 Dec 2017 17:06:46 GMT.

Only first 1000 GitHub users according to the count of followers are taken. This is because of limitations of GitHub search. Sorting algo in pseudocode:

githubUsers
 .filter(user =&gt; user.followers &gt; 1000)

	SELECT user_name FROM v_catalog.users;
	SELECT database_name FROM databases;
	SELECT schema_name FROM v_catalog.schemata;
	SELECT table_name FROM tables WHERE table_schema = 'my_schema';

	library(plyr)

	block.size = 128 * 1024 * 1024

	files.informations <- read.csv('workflow.csv', header=FALSE, stringsAsFactors=F)
	files <- files.informations[c("V5", "V8")]
	colnames(files) <- c("size", "filepath")

	for(i in 1:nrow(files)) {
	splitted.path <- strsplit(files[i,"filepath"], "/")

	#Prepare environment
	sudo apt-get update
	sudo apt-get install -y openjdk-7-jdk
	sudo apt-get install -y jmeter
	sudo apt-get install -y unzip

	wget http://jmeter-plugins.org/downloads/file/JMeterPlugins-Standard-1.2.0.zip
	wget http://jmeter-plugins.org/downloads/file/JMeterPlugins-Extras-1.2.0.zip
	wget http://jmeter-plugins.org/downloads/file/JMeterPlugins-ExtrasLibs-1.2.0.zip

	var countries_data = {"type":"FeatureCollection","features":[
	{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[74.92,37.24],[74.57,37.03],[72.56,36.82],[71.24,36.13],[71.65,35.42],[71.08,34.06],[69.91,34.04],[70.33,33.33],[69.51,33.03],[69.33,31.94],[66.72,31.21],[66.26,29.85],[62.48,29.41],[60.87,29.86],[61.85,31.02],[60.84,31.5],[60.58,33.07],[60.94,33.52],[60.51,34.14],[61.28,35.61],[62.72,35.25],[63.12,35.86],[64.5,36.28],[64.8,37.12],[66.54,37.37],[67.78,37.19],[69.32,37.12],[70.97,38.47],[71.59,37.9],[71.68,36.68],[73.31,37.46],[74.92,37.24]]]]},"properties":{"name":"Afghanistan"},"id":"AF"},
	{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[19.44,41.02],[19.37,41.85],[19.65,42.62],[20.07,42.56],[20.59,41.88],[20.82,40.91],[20.98,40.86],[20.01,39.69],[19.29,40.42],[19.44,41.02]]]]},"properties":{"name":"Albania"},"id":"AL"},
	{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[2.96,36.8],[8.62,36.94],[8.18,36.52],[8.25,34.64],[7.49,33.89],[9.06,3

	// fibonacci(40) takes 2 seconds in Node.js 0.6.14

	// http://en.wikipedia.org/wiki/Fibonacci_number

	function fibonacci(n) {
	return n < 2 ? n : fibonacci(n-2) + fibonacci(n-1);
	}

	: http://stackoverflow.com/questions/203090/how-to-get-current-datetime-on-windows-command-line-in-a-suitable-format-for-us
	@ECHO off
	set v_day=
	set v_month=
	set v_year=

	SETLOCAL ENABLEEXTENSIONS
	if "%date%A" LSS "A" (set toks=1-3) else (set toks=2-4)
	::DEBUG echo toks=%toks%
	for /f "tokens=2-4 delims=(-)" %%a in ('echo:^\|date') do (