Pankaj Bagwan bagwanpankaj

Ubuntu 15.04 (Vivid) has now been released and it fixes mostly all of the issues I had with my Thinkpad T450. I recommend doing a clean install of Ubuntu 15.04 and mostly avoiding all of the steps bellow!

My process for getting Ubuntu running really nicely on a Thinkpad T450 with all the hardware working. (I have my track pad disabled in the bios and only want to use the track point.)

Basic steps to get Ubuntu running nicely on the Thinkpad T450:

Install Ubuntu 14.10
Install latest stable mainline kernel (3.19.3 vivid at time of writing)
- Install headers_all package
then headers_amd64 package

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.

Element

Box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
elem.getClientRects(), elem.getBoundingClientRect()

RubyGems SSL Error

SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed

This error is actually produced by changes on rubygems site certificate in lieu of recent OpenSSL vulnerabilities. To fix this error one need to upgrade their rubygems

Specific problem with RubyGems

RubyGems bundles its trust certificate within itself (as it is used from command line tool),

These are a list of scripts sampled for Python 101 for PyOhio 2013.

Power of Scope

Data

fake_data.py

Python 101

Introduction

Welcome to Python 101 at PyOhio 2013!

	// gulpfile.js

	var gulp = require('gulp');
	var requireDir = require('require-dir');
	var tasks = requireDir('./tasks');

	gulp.task('sass', tasks.sass);
	gulp.task('serve:dev', tasks.serve.dev);
	gulp.task('serve:dist', tasks.serve.dist);

	// paste in your console
	speechSynthesis.onvoiceschanged = function() {
	var msg = new SpeechSynthesisUtterance();
	msg.voice = this.getVoices().filter(v => v.name == 'Cellos')[0];
	msg.text = Object.keys(window).join(' ');
	this.speak(msg);
	};

	<!doctype html>
	<html lang="en">

	<head>
	<meta charset="utf-8">
	<link rel="stylesheet" href="css/reveal.css">
	<link rel="stylesheet" href="css/theme/default.css" id="theme">
	</head>

	<body>

	package main

	import (

	"log"
	"net/mail"
	"encoding/base64"
	"net/smtp"
	"fmt"
	"strings"

	# mongodb.conf

	# Where to store the data.

	# Note: if you run mongodb as a non-root user (recommended) you may
	# need to create and set permissions for this directory manually,
	# e.g., if the parent directory isn't mutable by the mongodb user.
	dbpath=/var/lib/mongodb

	#where to log