This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
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.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent
#! /usr/bin/env ruby | |
# NOTE: Requires Ruby 2.1 or greater. | |
# This script can be used to parse and dump the information from | |
# the 'html/contact_info.htm' file in a Facebook user data ZIP download. | |
# | |
# It prints all cell phone call + SMS message + MMS records, plus a summary of each. | |
# | |
# It also dumps all of the records into CSV files inside a 'CSV' folder, that is created |
Native HTML controls are a challenge to style. You can style any element in the web platform that uses Shadow DOM with a pseudo element ::pseudo-element
or the /deep/
path selector.
video::webkit-media-controls-timeline {
background-color: lime;
}
video /deep/ input[type=range] {
# Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key | |
# that enables you to choose a character from a menu of options. If you are on Lion | |
# try it by pressing and holding down 'e' in any app that uses the default NSTextField | |
# for input. | |
# | |
# It's a nice feature and continues the blending of Mac OS X and iOS features. However, | |
# it's a nightmare to deal with in Sublime Text if you're running Vintage (Vim) mode, | |
# as it means you cannot press and hold h/j/k/l to move through your file. You have | |
# to repeatedly press the keys to navigate. |
# Latex files | |
*.aux | |
*.glo | |
*.idx | |
*.log | |
*.toc | |
*.ist | |
*.acn | |
*.acr |
Originally published in June 2008
When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.
To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.
Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.