Iain Barnett yb66

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

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

Firefox bullshit removal

Updated: Just use qutebrowser (and disable javascript). The web is done for.

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	#!/bin/sh

	VERSION="1.0"
	AUTHOR="John Doe"
	COPYRIGHT_YEAR="2000"

	SCRIPT_NAME="getopt_example"
	# or maybe SCRIPT_NAME="$(basename "$0")"

	show_usage() {

	#!/bin/sh
	####
	# Dockerize: A tiny replacement for Dockerfiles
	# This script leverages `docker run` and `docker commit` to provide a usable workaround for
	# restrictions of `docker build` and Dockerfile syntax to strictly host-independent builds.
	#
	# See these discussions:
	# https://github.com/docker/docker/pull/1124
	# https://github.com/docker/docker/issues/3156
	# https://github.com/docker/docker/issues/3949

	mkdir modulegraph
	cd modulegraph/

	rm -rf * .hg* .git*
	hg clone https://pyinstaller@bitbucket.org/ronaldoussoren/modulegraph .
	hg checkout modulegraph-0.12
	rm -rf .git*
	git init .
	git add .hg/hgrc
	cat > .gitignore <<EOF

	#!/System/Library/Frameworks/Ruby.framework/Versions/Current/usr/bin/ruby

	# SET YOUR_HOME TO THE ABSOLUTE PATH OF YOUR HOME DIRECTORY
	# chmod +x install.rb
	# ./install.rb
	YOUR_HOME = ''

	HOMEBREW_PREFIX = "#{YOUR_HOME}/usr/local"
	HOMEBREW_CACHE = '/Library/Caches/Homebrew'
	HOMEBREW_REPO = 'https://github.com/Homebrew/homebrew'

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<!-- https://gist.github.com/isao/5f6fbe89a438086c36d8
	BBEdit Language Module for TypeScript

	Put this file in
	~/Library/Application Support/BBEdit/Language Modules
	or equivalent.

	Forked from

	function hash(str) {
	for (var i = 0, len = str.length, s1 = 1, s2 = 0; i < len; i++) {
	s1 = (s1 + str.charCodeAt(i)) % 65521;
	s2 = (s2 + s1) % 65521;
	}
	return (s2 << 16) + s1;
	}