...are automagically available through accessors on the Active Record object. When you need to specialize this behavior, you may override the default accessors (using the same name as the attribute...
...and simply call the original implementation with a modified value. Example: class Poet < ApplicationRecord def name=(value) super(value.strip) end end Note that you can also avoid the original setter...
...implementation changes. The information below is validated for the current list of browsers we support. By default your html and body elements are only as high as the actual page...
...html and body elements will only be around 40 pixels high, regardless of the size of your browser window. You might be surprised by this, since setting a background on...
As developers we are dealing with many tasks every week. We need a system to organize ourselves. Goals After completing this card you should have: A to-do list that...
...never forget a task that a colleague or customer gives us. A habit of splitting any kind of task or project into actionable first steps. A habit of fully completing...
...for gems allows to add metadata to your gem, some of which have a special meaning and are helpful for users. You can provide links to your Github bugtracker or...
...file that are then used on the rubygems page of your gem (in the sidebar, e.g. see gem page of consul). Here are some keys that should be filled:
Although regular expression syntax is 99% interchangeable between languages, keep this in mind: By default, the dot character (".") does not match a line feed (newline, line break, "\n") in any...
...use the /s modifier in Ruby. It changes the RegExp to interpret text as Shift JIS encoded which you probably don't want. Javascript There is no modifier to make...
...desktop users may encounter some weird quirks: Aside from allowing only digits and decimal separators, an "e" is also allowed (to allow scientific notation like "1e3"). Non-technical users will...
...be confused by this. Your server needs to understand that syntax. If it converts only digits (e.g. to_i in Ruby) you'll end up with wrong values (like...
...administrator before publication. Requirements Movies in MovieDB should have one of the following workflow states: draft pending published declined A movie always begins as a draft and then transitions through...
...as it's getting reviewed. This could be a typical state flow for a movie: stateDiagram-v2 [*] --> draft draft --> pending pending --> declined: Reason declined --> pending pending --> published Changes to the...
When building an application that sends e-mails to users, you want to avoid those e-mails from being classified as spam. Most obvious scoring issues will not be relevant...
...to you because you are not a spammer. However, your application must do one thing by itself: When sending HTML e-mails, you should include a plain-text body or...
Event delegation is a pattern where a container element has a single event listener that handles events for all descendants that match a CSS selector. This pattern was popularized by...
...element was clicked!") }) This technique has some advantages: When you have many descendants, you save time by only registering a single listener. When the descendants are changed dynamically via JavaScript...
...like json or yaml). When you use it, it has an opinion on every single whitespace and linebreak, as well as a few other things. You renamed a variable and...
...prettier will reformat your code. This might not work for you if you have strong opinions yourself. You cannot configure it to do exactly what you want, there a deliberately...
Both knapsack and parallel_tests have the option to split groups by historic execution time. The required logs for this might be outdated since you manually have to update and...
...consistently up to date with no extra effort locally and/or remotely. How to always split by execution logs Parallel Tests The parallel_tests gem has the option flag --group-by...
...to compile the new main.ts file, e.g.: { // other options like "extents":, "compilerOptions":, "include": "files": [ "src/app/shared/spec/setup/main.ts" ], } Why Use a Custom Test Entry Configure global test environment providers Register custom Jasmine matchers...
...and test utilities Load icons, themes, and other test-wide setup Replace CLI's auto-generated bootstrap with your own Important: Keep TestBed options aligned with CLI defaults (strict error...
Add apt source: apt update -y && apt install -y gpg sudo wget curl sudo install -dm...
.../etc/apt/keyrings wget -qO - https://mise.jdx.dev/gpg-key.pub | gpg --dearmor | sudo tee /etc/apt/keyrings/mise-archive-keyring.gpg 1> /dev/null echo "deb [signed-by=/etc/apt/keyrings/mise-archive-keyring.gpg arch=amd64] https://mise.jdx.dev/deb stable main" | sudo tee /etc/apt/sources.list.d/mise.list
...default to using the element as the main document viewport. In CSS, prefer to set overflow properties to html (or :root). Scrolling the main viewport with JavaScript
...main document viewport is also scrollable by default. The element that corresponds to the main viewport is either (document.documentElement) or (document.body). Which one depends on the browser.
...config={}). There also is a generate method which will run the generator in a subprocess. Call it with generate 'generator_name', 'command line args'. Expected (hard-coded) directory structure of...
... #{generator name, e.g. model}_generator.rb USAGE Templates If you want to use the supplied template, directory and other template methods, you must call source_root 'path/to/templates' inside your generator...
...has to decide whether and how to do authorization. The usual approaches are: Using send_file with a regular controller. This is secure, but potentially slow, especially for large collections...
...This is fast (because Apache can deliver assets without going through Rails), but less secure. When going with the "unguessable URL" approach, it is possible to somewhat increase security by...
...s calc(100 - l)); Here is what happens: from currentColor tells hsl() to start with the value of currentColor. calc(h + 180) rotates the color hue by 180 degrees, i.e...
...to the opposite of the color wheel. s keeps saturation unchanged. calc(100 - l) inverts lightness. For example, 0% becomes 100%, and 100% becomes 0%. Example usage .demo { --inverted-color...
...This release has many minor changes and fixes to prepare your application for Rails 3. Step-by-step upgrade instructions: Upgrade rails gem Change your environment.rb so it says RAILS...
...for a detailed list of changes. 2.3.9 to 2.3.10 Fixes Vulnerability in Nested Attributes code. Step-by-step upgrade instructions: Upgrade rails gem Change your environment.rb so it says RAILS...
...this card, we describe a wrapper for it that humanizes a given number of seconds in the "next best" unit, like seconds, minutes, etc. Example usage >> new Duration(42).humanized...
>> new Duration(123456).humanized() => '1 Tag' >> new Duration(123456).humanized('es') => '1 día' Code Here is the code as an ECMAScript module. Note that we default to German in...
If your railscomplete-deployment uses the net-ssh-gem please ensure you use version 5.2.0 or newer to ensure you can deploy via Capistrano. It's best to use...
To completely remove the old host key on the client run: # remove host entry ssh-keygen -f "$HOME/.ssh/known_hosts" -R appserver.makandra.de # remove IP entry ssh-keygen -f "$HOME/.ssh/known_hosts" -R $(getent...
...Repeat Yourself (or DRY). In Ruby on Rails we keep our code DRY by sharing behavior by using inheritance, modules, traits or partials. When you reuse behavior you want to...
...writing integration tests with Cucumber, where you need to express yourself with Gherkin and step definitions instead of Ruby classes and methods. But don't dispair! Below you will find...
...the code below to check whether the browser can make connections to the current site: await isOnline() // resolves to true or false The code The isOnline() function below checks if...
...you can make real requests by re-fetching your site's favicon. If the favicon cannot be downloaded within 6 seconds, it considers your connection to be offline. async function...
Goals Know how to use the native DOM API to do the following: Selecting all elements matching a given CSS selector Selecting all descendants of a given element matching...
...a given CSS selector Registering event listeners Changing an element's CSS classes Changing an element's attributes Making the same change to a list of elements, e.g. hiding them...
...s presentation about asynchronous Javascript (there's also a German video presentation in our shared folder) Read about Promises on MDN and this visualization Read about async / await.
Read about canceling promises Error handling in event listeners Tasks, microtasks, queues and schedules Picking the Right Tool for Maneuvering JavaScript's Event Loop Browse the internet to answer...