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guilhermesimoes / .block
Last active September 2, 2022 05:21 — forked from mbostock/.block
D3.js: Automatic text sizing using em units
height: 760
license: gpl-3.0
@guilhermesimoes
guilhermesimoes / authentication.md
Last active October 15, 2016 23:26
How authentication should work (in my mind)
Page / User State Logged Out Logged In
/public-page Go to /public-page Go to /public-page
/page-requiring-auth
  1. Redirect to /login
  2. After successful login redirect to /page-requiring-auth
Go to /page-requiring-auth
/login
  1. Go to /login
  2. After successful login redirect to /
Redirect to /
/logout Redirect to /
  1. Log out the user
  2. Redirect to /
@guilhermesimoes
guilhermesimoes / detect-private-browsing.js
Created December 12, 2015 02:57 — forked from cou929/detect-private-browsing.js
Detect private browsing mode (InPrivate Browsing or Incognito).
function retry(isDone, next) {
var current_trial = 0, max_retry = 50, interval = 10, is_timeout = false;
var id = window.setInterval(
function() {
if (isDone()) {
window.clearInterval(id);
next(is_timeout);
}
if (current_trial++ > max_retry) {
window.clearInterval(id);
@guilhermesimoes
guilhermesimoes / README.md
Last active September 10, 2023 13:12
YouTube's new morphing play/pause SVG icon

As soon as I saw the new YouTube Player and its new morphing play/pause button, I wanted to understand how it was made and replicate it myself.

From my analysis it looks like YouTube is using [SMIL animations][1]. I could not get those animations to work on browsers other than Chrome and it appears [that they are deprecated and will be removed][2]. I settled for the following technique:

  1. Define the icon path elements inside a defs element so that they are not drawn.

  2. Draw one icon by defining a use element whose xlink:href attribute points to one of the paths defined in the previous step. Simply [changing this attribute to point to the other icon is enough to swap them out][3], but this switch is not animated. To do that,

  3. Replace the use with the actual path when the page is loaded.

@guilhermesimoes
guilhermesimoes / README.md
Last active October 18, 2015 15:07
JScript: Find small album covers

JScript to find album covers that measure less than 1000x1000 px. Perfect for those who like to manage their large music libraries.

@guilhermesimoes
guilhermesimoes / README.md
Last active April 5, 2020 16:55
D3.js: Animating between scales

The purpose of this gist is two-fold:

  1. Demonstrate how to animate between scales;

  2. Show how data visualization depends on the chosen scale.

    For example, we can see how some data clusters using the power scale. The datums 1 and 10 are rendered on the same spot. If we had a lot of these points close to each other and performance was a concern, filtering out some of these points could prove valuable.

@guilhermesimoes
guilhermesimoes / README.md
Last active March 27, 2016 23:02 — forked from anonymous/gist:3267597
JScript: Find broken iTunes tracks

JScript to find broken tracks that iTunes can no longer find. Perfect for those who like to manage their large music libraries.

@guilhermesimoes
guilhermesimoes / README.md
Last active April 6, 2020 23:41
D3.js: Animating bars "going down"

One confusing aspect of animating bars (and working with SVG in general) is that the coordinate system origin is at the top-left corner, which means that y increases downwards.

One would expect that to animate a bar diminishing in size ("going down") changing the height attribute would be all that's needed. However that's not true. This is a visual explanation of why it's necessary to animate both y and height attributes.

Another solution would be to surround the bar with a clipPath element and then transition the bar down. This way, everything on the inside of the clipping area is allowed to show through but everything on the outside is masked out.

This other approach would only work for a simple bar chart though. For a more complex, animated stacked chart, animating both y and height attributes is the only solution.

@guilhermesimoes
guilhermesimoes / airbus_data.tsv
Last active September 26, 2019 14:57 — forked from atmccann/airbus_data.tsv
D3.js: Synchronously animating multiple paths in a multi-series line chart
date Airbus Boeing
2000-07-31 0 0
2000-08-31 -0.884 9.8912
2000-09-29 9.6685 32.1383
2000-10-31 32.5967 38.9245
2000-11-30 33.1492 41.4853
2000-12-29 30.7182 35.2113
2001-01-31 27.0718 19.8464
2001-02-28 24.3094 27.4264
2001-03-30 16.0773 14.1306
@guilhermesimoes
guilhermesimoes / line_count_benchmark.rb
Last active September 11, 2023 09:36
Ruby Benchmark: Counting the number of lines of a file
# gem install benchmark-ips
require "benchmark/ips"
path = "lib/rubycritic/cli/options.rb"
Benchmark.ips do |x|
x.report("read + each_line") { File.read(path).each_line.count }
x.report("open + each_line") { File.open(path, "r").each_line.count }