Native promises have no methods to inspect their state. You can use the promiseState function below to check whether a promise is fulfilled, rejected or still pending: promiseState(promise, function...
// `state` now either "pending", "fulfilled" or "rejected" }); Note that the callback passed to promiseState will be called asynchronously in the next microtask. Usage example: Tests Note Since this card...
The closest is probably Nimbus Sans L, which is released under the GPL, AFPL, LPPL licenses. However, I couldn't find a way to convert Nimbus Sans L into a...
I finally settled with Liberation Sans, which is awesome for some reasons: Although it's available for free, it's a high quality font because its creation was...
...to run JS tests. Given a Vue project that uses Jest (via vue-cli-service) with the following package.json: { "scripts": { "test": "vue-cli-service test:unit --testMatch='**/tests/**/*.test.js' --watch...
...allows us to run Jest tests with yarn test. The only downside of this setup is that debugger statements are ignored with the CLI approach - there are no Browser Devtools...
While the Software Design Basics card tried to make a point about writing self explanatory code, it's still essential for every application to maintain a good documentation. The...
...README file is essential for fellow engineers to get started quickly, as it contains documentation of all major moving parts of the given app. Resources README Driven Development
...has its weak points, but I want to point out that it has clear strengths, too. Pro Simple and beautiful interface. Outstandingly organized source code. Have never seen a JS...
...toolbar buttons, pass various callbacks, etc. Features a collection of great plugins. Easily extendable by self-made plugins. It is really simple to write one – see example below.
tl;dr: Ruby's Bundler environment is passed on to system calls, which may not be what you may want as it changes gem and binary lookup. Use Bundler.with_original...
...env to restore the environment's state before Bundler was launched. Do this whenever you want to execute shell commands inside other bundles. Example outline Consider this setup: my_project/Gemfile...
Note: You won't need this for single lines of text. In this case it is better to just use the text-overflow property: Use CSS "text-overflow" to truncate...
...use -webkit-line-clamp in your CSS/SASS to natively render an ellipsis (...) after a specific amount of lines for a multi-line text in your HTML. Earlier, it was necessary...
When you are using the #selector_for helper in Cucumber steps, as e.g. Spreewald does, the following snippet will save you typing. It recognizes a prose BEM-style selector and...
...maps it to the corresponding BEM class. For a variation on this idea, see An auto-mapper for ARIA labels and BEM classes in Cucumber selectors. Examples "the main menu...
Goals After finishing this lesson you should be able to read and write simple Ruby programs. Gain an understanding of the following concepts: Working with basic datatypes: String, Integer...
Classes and inheritance The difference between class methods and instance methods (def self.method vs. def method) Modules and include Input and output Simple regular expressions Resources Tutorials
...a new callback to your model that (e.g.) caches some data when it is saved. Now you need to run that callback for the 10000 existing records in the production...
Write a clever migration, possibly by embedding the model into the migration script. Open the Rails console after deployment and re-save every single record. You should probably...
When giving a presentation where you do some coding, the font size you usually use is probably a bit too small and makes code hard to read for users on...
...smaller screens or low-bandwidth connections when the image quality is lower. Here are two solutions. Presentation Mode RubyMine offers a "Presentation Mode" which you can use. Simply navigate to...
A recent patch level Ruby update caused troubles to some of us as applications started to complain about incompatible gem versions. I'll try to explain how the faulty state...
...care of a few things: The new Ruby version is installed The Bundler version stated in the Gemfile.lock is installed Geordi is installed (for database dumps) The gems of the...
When you do a bitwise copy using the dd tool you will not see any output until it completes or an error occurs. However, you can send a command signal...
...to the process to have it show its progress so far. From another terminal, simply call (be root or use sudo): pkill -USR1 dd This makes dd write something like...
When internationalizing your Rails app, you'll be replacing strings like 'Please enter your name' with t('.name_prompt'). You will be adding keys to your config/locales/*.yml files over...
...the right place is a challenging task. The gem i18n-tasks has you covered. See its README for a list of things it will do for you. Note
...test you can also use a handful of rake tasks to prepare the database structure directly. They can produce different results, though. In a nutshell, to ensure your test database...
...gains the correct structure: Don't use rake db:test:prepare carelessly or use rake db:test:clone_structure ← preferred :) or use rake db:migrate RAILS_ENV=test and don...
...AWS elasticache is memcached) telnet foohost23.cs2631.0001.euw1.cache.amazonaws.com 11211 Once you're connected, find out which 'slabs' exist within the cache: stats items STAT items:1:number 3550 STAT items:1:age...
...STAT items:1:evicted 0 STAT items:1:evicted_nonzero 0 STAT items:1:evicted_time 0 STAT items:1:outofmemory 0 STAT items:1:tailrepairs 0
Situation: You want to write a spec for a function inside an Angular service. This function at some point makes an API request and acts upon response. Notably, your Angular...
...uiRouter, although it is not used nor actually required for this test. Working test setup # Capitalized expressions are intended to be replaced with YOUR values describe 'SERVICE', -> beforeEach -> module 'MODULE...
Let's say you have a form that you render a few times but you would like to customize your submit section each time. You can achieve this by rendering...
...form partial as layout and passing in a block. Your template or partial then serves as the surrounding layout of the block that you pass in. You can then yield...
tl;dr: Do not use merge! for session hashes. Use update instead. Outline Let's assume you're modifying the Rails session. For simplicity, let's also assume your session...
...is empty when you start (same effect when there is data): # In our example, we're in a Rack middleware request = Rack::Request.new(env) request.session.merge! :hello => 'Universe' request.session => {} Wat?
Capistrano 3 is a major rework of the framework and requires several adjustments to your deploy configuration files. The biggest change is that they moved away from their custom DSL...
...release_roles|...) :some_role do Resources Very helpful, leads you 90% of the upgrade: https://semaphoreci.com/blog/2013/11/26/capistrano-3-upgrade-guide.html Official documentation Many examples of SSHKit...
Let's say we have posts with an attribute title that is mandatory. Our example feature request is to tag these posts with a limited number of tags. The following...
...In most cases you want to use Option 4 with assignable values. The basic setup for all options looks like this: config/routes.rb Rails.application.routes.draw do root "posts#index" resources :posts, except...
...If you are plucking from the id column in particular you can also say: User.active.ids => [1, 5, 23, 42] For a DISTINCT selection, use distinct on your scope (not the...
...resulting array). Article.distinct.pluck(:state) # SELECT DISTINCT state FROM articles => ['draft', 'published'] In Rails 3 and 4 you must use uniq instead of distinct: Article.uniq.pluck(:state) # SELECT DISTINCT state FROM articles...
...Ruby parser module of Ruby-GetText comes across a file in one of its search directories (e.g. lib/scripts/) and finds out that you are defining ActiveRecord classes inside it, it...
...the whole file. Here is how to avoid that. What's happening? Let's say you have the following script which is only run once, manually, via script/runner: # lib/scripts/doomsday.rb
jQuery's deferred objects behave somewhat like standard promises, but not really. One of many subtle differences is that there are two ways to chain callbacks to an async functions...
...is done, which only exists in jQuery: $.ajax('/foo').done(function(html) { console.debug("The server responded with %s", html); }); There is also then, which all promise libraries have: