...doing something like the following. @user = User.something(123) rescue User.new # DON'T or @user = begin User.something(123) rescue # DON'T User.new end This is bad. Do not do that.
...to be raised, you can always rescue for its class. Do that instead. @user = begin User.something(123) rescue ActiveRecord::RecordNotFound User.new end Any unexpected errors will then still be raising...
There are two ways a logout in SAML can happen: Service Provider (SP) initiated and Identity Provider (IDP) initiated logout...
For Sidekiq to be able to retry your jobs it has to be able to catch errors that occur while...
You can chain multiple Capybara matchers on the page or any element: expect(page) .to have_content('Example Course')
ignore_rules << (pattern || block) end def mute(&block) @muted = true if block begin block.call ensure unmute end end end def unmute @muted = false end def self.current @current ||= new...
...would hand you UTC objects whose to_s(:db) may not convert properly. Legacy behavior in Rails 2.3 It's been briefly mentioned in the random list of ActiveSupport goodies...
...joined tables or multiple queries? If you don't like the cleverness of this behavior, you can explicitely tell ActiveRecord how to preload associations with either JOINs or separate queries...
...includes usually works nicely, but Rails will apply some magic, as mentioned at the beginning of this card. This is subject to issues with polymorphic associations, too...
...values, which map to one context, e. g. mail components, in order to provide better readability of your tests or to even make clear a tests fail reason due to...
...form disables the submit button while working. // bad (how we used to do it) beforeEach(() => { this.form = setupMyForm() this.submitButton = findTheSubmitButton() }) it('disables the submit button while working', (done) => { expect(this.submitButton.disabled).toBe...
...our specs to simply return a Promise, so we could rewrite this as // slightly better it('disables the submit button while working', () => { expect(this.submitButton.disabled).toBe(false) let submitPromise = this.form.onSubmit()
...Haml maintainer, this negatively impacted rendering performance. So in Haml 6, they kept this behavior only for a few attributes, which they called "boolean". All other attributes will just render...
...their value as it is given. Behavior of "boolean attributes" remains unchanged No Haml value => no HTML value Boolean Haml value => attribute is rendered depending on that value
...ms have passed!') }, function(reason) { console.error('Something went wrong: %o', reason) } ) This will become more important when we talk about async/await later. Exceptions are converted within then() handlers function fetchUsers...
} If f1() and f2() have an async API, our control flow must become async: function f1() { return Promise.resolve(2) } function f2(x) { return Promise.resolve(x * x) }
This note shows how to merge an ugly feature branch with multiple dirty WIP commits back into the master as...
...can be useful to model a period without an actual end or an actual beginning. Imagine someone taking holidays and booking a holiday without knowing the end yet. Or providing...
...notification service: Use @Input() id: number with component input binding; Update notification.service.ts: Define notification$: BehaviorSubject: Store the last fetched notification; Update notification$ when a new notification is fetched; Using Efficient...
...keywords in your prompts. LLMs excel at pattern recognition, and specific terminology reduces ambiguity. Beyond that giving examples for high level APIs of your imagened class design or using an...
TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set.
You may remember to use the || operator with caution to set defaults. We'll see that && and other conditionals come...
...as the video is free for end users." (MDN) H.265 / HEVC see H.264 (successor, better compression as H.264) VP8 royalty free VP9 royalty free (sucessor, better bit rate as VP8...
royalty free (planned successor of VP9 with better compression rates) Further reading: MDN: Web video codec guide Audio Codec Format Matrix A broader comparison of many audio codecs can...
...Rails code is doing the delivery you can do your usual authentication and authorization beforehand. There are few exceptions where you want to store confidential files in the public folder...
...However, users with limited bandwidth (i.e. on mobile) need to mine their data budget better. One popular strategy to improve the website performance is to not load images until they...
...via jQuery, as it does not support capturing events. JS-only: not working The "best" strategy would be to hide the src attribute of image tags from the browser with...
...ms long. Once a frame renders longer than 16ms, the page will begin to feel staggering and slow. Google Chrome DevTools The Chrome DevTools enable you to precisely investigate and...
...complex. Deeply nested rules and slow selectors are the main cost factors. Using a BEM pattern for CSS should produce relatively fast CSS. Performance issue 4: Slow repaints
Static error pages To add a few basic styles to the default error pages in Rails, just edit the default...
When testing JavaScript functionality in Selenium (E2E), you may need to access a class or function inside of a evaluate...
...The bash functions above are only an iteration from my previous bash alias. It became quite unreadable over time and and copies the raw XML to the clipboard (not files...
...I am really pleased with it -- but only on a desktop computer. Have you benchmarked the framework also on smartphones and tablets? Unfortunately I must say, that it does not...
...as a jQuery collection: let $element = $(element) An API object to call additional JavaScript behavior added by a library: var player = flowplayer($element) player.play() Framework activation layers (like Angular directives...