...enlightenment in order to learn Ruby. The goal is to learn the Ruby language, syntax, structure, and some common functions and libraries. We also teach you culture. Testing is not...
...just something we pay lip service to, but something we live. It is essential in your quest to learn and do great things in the language...
When you create a temporary file (e.g. to store a generated Excel sheet) and try to send it to the browser from a controller, it won't work by default...
...this controller action: class FoosController < ApplicationController def download file = Tempfile.new('foo') file.puts 'foo' file.close send_file file.path end end Accessing this controller action will usually raise a 404 not found...
...measurement metrics in Linux. These are the differences: Code Name Description vsz virtual memory size Total amount of memory a process may hypothetically access. Includes swapped memory, memory from external...
...libraries and allocated memory that’s not used. rss resident set size Total amount of non-swapped used physical memory. Includes memory from external shared libraries. pss proportional share size...
Traveling Ruby is a project which supplies self-contained, "portable" Ruby binaries: Ruby binaries that can run on any Linux distribution and any OS X machine. This allows Ruby app...
...to bundle these binaries with their Ruby app, so that they can distribute a single package to end users, without needing end users to first install Ruby or gems...
...the new way to do it, and it's great, especially in combination with Sprockets (or Propshaft on Rails 7). You might be missing some convenience features, though.
...cover one specific issue: Once you have started your development Rails server and esbuild with the --watch option (if you used jsbundling-rails to set up, you probably use bin/dev...
...posts; if you use pagination the queries will be more complicated, but the point still stands. Looks harmless enough? It is not. The problem ActiveRecord will rewrite this into a...
...query using LEFT JOINs which looks something like this: SELECT "blog_posts".*, "comments".*, "attachments".* FROM "blog_posts" LEFT OUTER JOIN "comments" ON "comments"."blog_post_id" = "blog_posts"."id"
...Plotting graphs in Ruby with Gruff, which comes handy for many uses cases, you sometimes might need configuration for more advanced plots, e.g. for academic concerns. Then using Gnuplot, the...
...first academic open source plotting software, might be a good option. There are several wrappers for Ruby available and I mainly looked at one of the two most frequently used...
...gem like accept_language. Customizing Rails error messages for models and attributes Rails I18n scope for humanized attribute names HTML: Making browsers wrap long words Use the same translations for...
...I18n fallback locales Rails: Including HTML in your i18n locales Even for a single language, locales are useful Even if your application only supports a single language, it makes sense...
When ending a Selenium test Capybara resets the browser state by closing the tab, clearing cookies, localStorage, etc. It may be a good idea to wait for all in-flight...
...AJAX requests to finish before ending a scenario: You may have client-side JavaScript that freaks out when the tab closure kills their pending requests. If that JavaScript opens an...
Systemd's networkd will drop IP-Addresses configured by other processes like Keepalived's VRRP, when it is restarted. This may happen on updates. To prevent this following settings are...
...critical: yes to /etc/netplan/50-cloud-init.yaml eth1: addresses: - 192.0.2.67/24 gateway4: 192.0.2.1 nameservers: addresses: - 198.51.100.42 - 198.51.100.53 search: - example.lcal critical: yes run netplan generate This will add the CriticalConnection to your networkd configuration...
A severe bug was found in ImageMagick by Bryan Gonzalez from Ocelot Team. It allows to embed the content of an arbitrary remote file when ImageMagick parses PNG files.
...on updated Packages for Ubuntu (https://ubuntu.com/security/CVE-2022-44268). Due to that we patched our systems as follows: Ubuntu 22.04: Get package source on a Ubuntu 22.04 system: apt-get source...
window.getSelection().toString(); Browser support: IE9+, Android 4.3+, Safari...
Surprisingly exhaustive new icon set by Google. Available as PNG, SVG and as a icon font. Comment from Henning I tried using the icon set in a project. I found...
...the quality, selection and handling far worse than what we are used to in FontAwesome...
curl http://ipecho.net/plain; echo
The Paper elements are a set of UI elements that implement the material design system...
Impressive set of design guidelines from Google...
Declare an enum attribute where the values map to integers in the database, but can be queried by name.
...the dot-underscore (._foo, ._bar, etc.) files created by (badly-behaved) Mac OS X systems on non-AFP server volumes...
Since we are migrating from our homegrown mixins.sass and helpers.sass to Compass, here is a list of all the mixins provided by Compass...
...about what HTTP was designed for. The original post has been removed for some stupid gender discussion...
Great look at the tradeoffs between progressive enhancement with jQuery or similiar, vs. client-side views...
For custom Rake tasks, you shouldn't need to modify them after the original definition. However, if you want to add behavior to some vendor tasks (such as those defined...
...always been able to access the humanized version for the current value like this: song = Song.new(:genre => 'pop') song.humanized_genre # => 'Pop music' You can now also retrieve the humanized version...
...of any given value by passing it as an argument: song.humanized_genre('rock') # => 'Rock music...
The amount helper now retrieves the decimal separator from your I18n dictionary (number.format.separator) instead of hardcoding it to a comma. money_amount helper tunnels options to amount New money_amount...