Mario Vejlupek devopsmariocom

TL;DR: If you want to see me perform a spoken word poem about JavaScript in front of 1000 people (and on video), please ⭐ star this gist. If you're on mobile, you'll need to request desktop site.

JavaScript Slam Poetry

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

Reviewer's checklist - How to boost your code review skills

Purpose of my lightning talk is to present insights I've reached as a reviewer/ reviewee in the last couple of months.

I will answer these questions:

What makes a good code review good?
How to build guidelines? Dos and Don'ts.
How to educate dev/team members about the code review process?

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

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	locals {
	task_definition_family = "${local.prefix}-${var.ecs_task_name}"
	}

	data "aws_region" "current" {}
	data "aws_caller_identity" "current" {}

	data "aws_ecs_task_definition" "hack_get_image" {
	count = var.preserve_image ? 1 : 0
	task_definition = local.task_definition_family

	#!/bin/bash

	sudo defaults write /Library/Preferences/com.apple.loginwindow GuestEnabled -bool NO

	# Enter some long unpredictable password
	sudo passwd root

	function ssr(req, res, url) {
	let user = req.user //comes from passport
	const preloadedState = { user, url } // Compile an initial state
	const store = configureStore(preloadedState) // Create a new Redux store instance
	const html = render(<Provider store={store}><Html /></Provider>) // Render the component to a string
	const finalState = store.getState() // Grab the initial state from our Redux store
	res.send(renderFullPage(html, finalState)) // Send the rendered page back to the client
	}

	function renderFullPage(html, preloadedState) {

	"""Ansible dict filters."""

	# Make coding more python3-ish
	from __future__ import (absolute_import, division, print_function)
	__metaclass__ = type


	from ansible.errors import AnsibleError

	#!sh

	dockerfile() {
	cat <<EOF
	FROM debian:8
	RUN echo 123 >/a && printf abc >/b
	RUN echo 456 >/a && echo def >>/b
	EOF
	}