Hiroshi Yamamoto hyamamoto

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

📂 Persistent "pipes" in Linux

In a project I'm working on I ran into the requirement of having some sort of persistent FIFO buffer or pipe in Linux, i.e. something file-like that could accept writes from a process and persist it to disk until a second process reads (and acknowledges) it. The persistence should be both across process restarts as well as OS restarts.

AFAICT unfortunately in the Linux world such a primitive does not exist (named pipes/FIFOs do not persist

Default aiohttp static handler doesn't support any modification on the fly.

This handler helps to serve static files from directory ./static as is and convert JSX for ReactJS if needed.

import asyncio
import logging
from aiohttp import web
import os

Requirements

VirtualBox
Vagrant
Packer
a Mac with a lot of Memory/CPU/Disk
great Templates/Tools from https://github.com/timsutton/osx-vm-templates

	# Note – this is not a bash script (some of the steps require reboot)
	# I named it .sh just so Github does correct syntax highlighting.
	#
	# This is also available as an AMI in us-east-1 (virginia): ami-cf5028a5
	#
	# The CUDA part is mostly based on this excellent blog post:
	# http://tleyden.github.io/blog/2014/10/25/cuda-6-dot-5-on-aws-gpu-instance-running-ubuntu-14-dot-04/

	# Install various packages
	sudo apt-get update

	// dependencies
	var async = require('async');
	var path = require('path');
	var AWS = require('aws-sdk');
	var gm = require('gm').subClass({
	imageMagick: true
	});
	var util = require('util');
	// get reference to S3 client
	var s3 = new AWS.S3();

	import aiohttp
	import asyncio

	async def get_body(url):
	response = await aiohttp.request('GET', url)
	raw_html = await response.read()
	return raw_html

	async def main():
	# run them sequentially (but the loop can do other stuff in the meanwhile)

	#!/bin/bash
	# Nico Snyman, [email protected], 14/05/2015
	# Change an instance type, while keeping snapshots
	# This script will stop an instance identified by instance ID,
	# take snapshots of all atached volumes, and restart it
	# Use:
	# -i instance ID - REQUIRED - stored in instance_id
	# -t instance new instance type - REQUIRED - stored in instance_type
	# -s if set to 0, no snapshot will be taken, dafault is 1
	# (take snapshot of attached volumes) - stored in snapshot

	object jto {

	type _1 = Succ[_0]
	type _2 = Succ[_1]
	type _3 = Succ[_2]
	type _4 = Succ[_3]
	type _5 = Succ[_4]

	// Natural numbers (extracted from shapeless)