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natematykiewicz / unroutable_routes.rake
Last active June 9, 2022 19:47
Find routes that will raise a routing error when requested
desc 'Find routes that will raise a routing error when requested'
task unroutable_routes: :environment do
# A lot of this code was taken from how `rake routes` works
require 'action_dispatch/routing/inspector'
unroutables = Rails.application.routes.routes.
map { |r| }.
reject { |r| r.internal? || r.engine? || r.path.starts_with?('/rails/') || !r.controller }.
spilth / albums-index.html.erb
Created February 25, 2022 02:46
Tabbed Navigation with Turbo Frames
<p style="color: green"><%= notice %></p>
<%= turbo_frame_tag :items do %>
<% @albums.each do |album| %>
<%= render album %>
<%= link_to "Show this album", album %>
// This code is to be used with By default Turbo keeps visited pages in its cache
// so that when you visit one of those pages again, Turbo will fetch the copy from cache first and present that to the user, then
// it will fetch the updated page from the server and replace the preview. This makes for a much more responsive navigation
// between pages. We can improve this further with the code in this file. It enables automatic prefetching of a page when you
// hover with the mouse on a link or touch it on a mobile device. There is a delay between the mouseover event and the click
// event, so with this trick the page is already being fetched before the click happens, speeding up also the first
// view of a page not yet in cache. When the page has been prefetched it is then added to Turbo's cache so it's available for
// the next visit during the same session. Turbo's default behavior plus this trick make for much more responsive UIs (non SPA).
mrtcmn / workaround.css
Created November 27, 2020 15:04
firefox backdrop-filter workaround
@supports (-webkit-backdrop-filter: none) or (backdrop-filter: none) {
.blurred-container {
-webkit-backdrop-filter: blur(10px);
backdrop-filter: blur(10px);
/* slightly transparent fallback for Firefox (not supporting backdrop-filter) */
@supports not ((-webkit-backdrop-filter: none) or (backdrop-filter: none)) {
.blurred-container {
paulirish /
Last active April 19, 2024 14:42
What forces layout/reflow. The comprehensive list.

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
bokmann / JRuby Awesome Performance
Last active August 31, 2023 07:32
brief summary of massive performance improvements with JRuby
# Thee will be more information here when I share the entire problem space I'm working on, but
# in short, this is preview material for my second talk in a series called "What Computer Scientists Know".
# The first talk is on recursion, and goes through several examples., leading up to a problem based
# on a simple puzzle that initial estimates based on performance of a previous puzzle would take years
# to solve on modern computers with the techniques shown in Ruby. That sets the stage for improving the
# performance of that problem with threading, concurrency, and related tuning.
# The second talk is on threading and concurrency, touching on algorithmic performance as well.
# Using some knowledge of the problem (board symmetry, illegal moves, etc), we reduce the problem space
# to about .5% of what we initially thought it was. Still, the initial single threaded solution took more
madrobby / date.rb
Created February 15, 2013 17:37
`Date.parse` with some extra leeway to handle user input errors. Handles things like `2013-02-31` (parses it as `2013-02-29`) and handles things in general like users would expect.
module Freckle
module Date
class << self
def parse(string)
raw = string.to_s.strip
return nil if raw.empty?
# reverse order if we encounter "European" formatting
huangzhichong /
Created August 7, 2012 12:38
Selenium Webdriver CheatSheet

API workthough

  1. Open a browser

    # start an instance of firefox with selenium-webdriver
    driver = Selenium::WebDriver.for :firefox
    # :chrome -> chrome
    # :ie     -> iexplore
  • Go to a specified URL
rtanglao / findVietnamese.rb
Created June 21, 2012 22:48
Regular expression to find suspected vietnamese spammers
#!/usr/bin/env ruby
# -*- coding: utf-8 -*-
require 'rubygems'
require 'json'
require 'time'
require 'date'
require 'mongo'
require 'pp'