By default, Rails views escape HTML in any strings you insert. If you want to insert HTML verbatim, you need to call #html_safe. However, #html_safe does not "unescape...
...a string. It merely marks a string as safe for unescaped insertion. How html_safe works Calling html_safe on a String returns a new object that looks and acts...
Get "PuTTY Link" and "Pageant" (an SSH key agent) from the PuTTY download page. Run pageant.exe, find its icon inside your system tray and add your SSH key.
...a cmd and put the full path to PuTTY's plink.exe into the GIT_SSH environment variable, e.g.: set GIT_SSH=D:\PuTTY\plink.exe You can then use Git like...
2.ordinalize # => "2nd" 1002.ordinalize # => "1002nd" 1003.ordinalize # => "1003rd" -11.ordinalize # => "-11th" -1001.ordinalize # => "-1001st...
TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set. Proxy caching is a good feature to serve your publicly visible application...
...server SHOULD include a Vary header field with any cacheable response that is subject to server-driven negotiation. Doing so allows a cache to properly interpret future requests on that...
When storing floating-point numbers such as prices or totals in an SQL database, always use a DECIMAL column. Never use FLOAT or kittens will die. DECIMAL columns are parametrized...
...with a precision and a scale. These parameters describe which numbers can be stored in that column. E.g. a decimal with a precision of 5 and a scale of...
Is your application doing something expensive every few seconds? Maybe an animated slider that rotates images? Maybe you are updating data over the network every five minutes? It's a...
...this if the your document tab is not even visible to the user. This saves your user's battery and data plan. You can ask document.visibilityState or document.hidden whether this...
...HTML's accepts a single file. You can allow multiple files via . But sometimes, selecting multiple files is not enough and can be cumbersome for the user. Enter webkitdirectory:
...webkitdirectory switches the browser's file picker to select a directory. All files inside that directory, and inside any nested subdirectories, will be selected for the file input.
...external commands from within Ruby, but the most powerful ones are Open3.capture3 and Open3.popen3. Since those can do almost everything you would possibly need in a clean way, I prefer...
...to simply always use them. Behind the scenes, Open3 actually just uses Ruby's spawn command, but gives you a much better API. Open3.capture3 Basic usage is require 'open3'
Note: We are talking about Machinist 1 here, Machinist 2 may have solved this or might require a different approach. Machinist allows named blueprints (e.g. User.blueprint(:admin)) that inherit from...
...for the vip blueprint go here inherit :premium end ...put the attached code into spec/support/machinist_inherit.rb and require 'spec/support/machinist_inherit' in your blueprints.rb. Note that it might not be sufficient to put...
...method to automatically compute an ETag from the given record, array of records or scope of records: class UsersController < ApplicationController def show @user = User.find(params[:id]) fresh_when @user
...by passing an array of ETaggable objects to fresh_when. class UsersController < ApplicationController def show @user = User.find(params[:id]) # The show template also renders the user's posts. fresh_when...
When testing JavaScript functionality in Selenium (E2E), you may need to access a class or function inside of a evaluate_script block in one of your steps. Capybara may only...
...your tests (and neither in the dev console). The following principles/concepts also apply to Sprockets. Say we have a StreetMap class: // street_map.js class StreetMap { function getLatitude() { // ... } function renderOn(mapElement) { // ... } }
...manage to find the cause of this behaivour yet, but I think it has something to do with the start order of the nova services. (When nova-network isn't...
...present at nova-compute startup, no rules will be applied at all) You can restart the nova-compute service and nova should insert the rules one by one (you can...
Spreewald comes with a selector_for helper that matches an English term like the user's profile into a CSS selector. This is useful for steps that refer to a...
...particular section of the page, like the following: Then I should see "Bruce" within the user's profile ^^^^^^^^^^^^^^^^^^ If you're too lazy to manually translate English to a CSS...
Code splitting is a feature of esbuild that can keep huge libraries out of the main bundle. How code splitting works Like Webpack esbuild lets you use the await import...
...code on demand: // application.js const { fun } = await import('library.js') fun() However, esbuild's code splitting is disabled by default. The code above would simply inline (copy) library.js into application.js:
The solution in this card is based on a stack overflow post by Leventix. If you need to make request come from a fixed IP address for the duration of...
...a Cucumber scenario, the code below lets you write this: Given my IP address is 188.174.117.205 Rails 3 Given /^my IP address is "(.*?)"$/ do |ip| ActionDispatch::Request.any_instance.stub(:remote_ip).and...
I was recently asked to optimize the response time of a notoriously slow JSON API endpoint that was backed by a Rails application. While every existing app will have different...
...be used to reproduce the results. I tried to mimic the case where things started out fast but did not scale well: There is an existing Rails App with a...
This looks like it is safe to use: 2.2.1 :001 > a = b = "hello world" "hello world" 2.2.1 :002 > a "hello world" 2.2.1 :003 > b "hello world" 2.2.1 :004 > b = " goodbye...
...happening when we do a = b = "hello world"? First, b is assigned to a String object "hello world", then a is assigned to b. a and b are now assigned...
...Thunderbird 3 put there. Though the CompactHeader addon is often claimed to be a solution it does way too much for me -- I like the headers the way they are...
...very well for me (keeps the date and "other actions" menu on the right, see the screenshot below): Open up your profile directory (~/.thunderbird/ /) Create a chrome directory inside it...
Use the click method on the DOM element: let link = document.querySelector('a') link.click()
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was...
...as T2 > T3> T1 > T4 > T5 > T6. Selection of a strategy In the preselection coverage-, search-based, model- and combinations of different prioritization methods. History- and fault-based approaches could...
My RubyMine (and it seems like many other Java GUI applications) crashes the Compiz window decorator almost every time on exit. This also seems to happen for the Unity decorator...
...Update: The commited fix from below seems to have made it into the stable Ubuntu repository. Easy mode You can restore window decorations by executing this command: gtk-window-decorator...
...status code 400) |_http-title: 400 The plain HTTP request was sent to HTTPS port | ssl-cert: Subject: commonName=www.makandracards.com/countryName=DE | Not valid before: 2015-10-14T12...
...Not valid after: 2016-10-14T12:42:03+00:00 |_ssl-date: 2016-08-05T11:33:52+00:00; +9d23h48m18s from local time. | tls-nextprotoneg: | h2
When you need test images, instead of using services like lorempixel or placehold.it you may generate test images yourself. Here we build a simple SVG image and wrap it into...
...a data: URI. All browsers support SVG, and you can easily adjust it yourself. Simply set it as an image's src attribute. JavaScript Simple solution in modern JavaScript, e.g...
Defining one callback several times in the same class behaves different in ActiveRecord and ResourceController. While in ActiveRecord the callbacks are enqueued, they overwrite each other in ResourceController. ActiveRecord - a...
...common practice class Post < ActiveRecord::Base does 'post/behavior' before_validation :do_something end module Post::BehaviorTrait as_trait do before_validation :do_something_else end end do_something_else and...