The bin/webpack-dev-server command is not as smart as e.g. rails server, where it shows the proper fix within the error message. $ bin/webpack-dev-server yarn run v1.19.1 error Command "webpack-dev-server...
By default parallel_tests will spawn as many test processes as you have CPUs. If you have issues with flaky tests, reducing the number of parallel processes may help.
...Flaky test suites can and should be fixed. This card is only relevant if you need to run a flaky test suite that you cannot fix for some reason. If...
...like the rest of your Bootstrap 4 application. Rome comes with very little basic styling. While we could redefine its classes, we can configure the classes Rome applies to its...
...This is because Rome also uses styles internally as selectors which breaks internal behavior for space-separated strings or when using the same CSS class for multiple properties (e.g. text...
This is a presentation from 2019-01-21. Summary We want to move away from jQuery in future projects Motivations are performance, bundle size and general trends for the web...
...can polyfill the missing pieces Unpoly 0.60.0 works with or without jQuery Is jQuery slow? From: Sven To: unpoly@googlegroups.com Subject: performance on smartphones and tablets Hello I just used your...
Consider the following: describe '#something' do context 'with lots of required arguments' do it 'should work' do subject.something(:foo => 'foo', :bar => 'bar', :baz => 'baz').should == 'Hello world' end it 'should...
...is actually called. This way you can manipulate objects or other data before using the short-hand reference to your method call. Yes, it is quite similar to using variables...
When working with feature branches, stale branches pile up over time. It's best to remove them right after merge, locally and on the remote, but it is a little...
...above). Paste this: #!/bin/bash exec < /dev/tty # Get the current branch name branch_name=$(git branch --show-current) # Get the name of the branch that was just merged reflog_message=$(git...
...alpha channel value, you can use Gimp: Use the color picker tool Hold the Shift key while clicking the pixel A window will appear, containing color information, including the alpha...
...cases beyond that to make your life easier. For this cheatsheat I tried to structure the most useful commands by different use cases, such that a practical oriented overview of...
...some commands I added some tips for their usage and further details on their subcommands For most of the commands shortly explained here, there are some examples along with a...
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...
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...
...its advisor model to clarify its approach or to get "help" in more complex situations (like planning or debugging). How to use In Claude Code, type /advisor to open a...
...as an argument to the /advisor command. /advisor fable Your chosen advisor model is saved to your Claude Code settings file; new sessions will use it by default. Currently (August...
If you want to make your Rails application be capable of sending SMTP emails, check out the action mailer configuration section in the Ruby on Rails guide.
...will end up having an smtp_settings hash that looks something like this: smtp_settings = { address: ..., domain: ..., port: ..., user_name: ..., password: ..., authentication: ..., tls: ..., enable_starttls_auto: ..., } This hash can be...
Note: Modern Rails has two build pipelines, the asset pipeline (or "Sprockets") and Webpacker. The principles below apply for both, but the examples shown are for Sprockets.
...your application uses many assets, such as images, javascripts and stylesheets. Without your intervention, the browser will request these assets again and again on every request. There is no magic...
Luckily, this is simple. Just install three packages: sudo apt install ipheth-utils libimobiledevice-dev libimobiledevice-utils Then turn on the "Personal Hotspot" in iPhone settings, connect it to your...
...programmers dislike meetings so much is that they're on a different type of schedule from other people. Meetings cost them more...
whatsmydns.net is an online service that allows you to instantly perform a DNS lookup to check a hostnames current IP Address and other DNS information against a selection of random...
...name servers around the world. This is especially useful to check the current state of DNS propagation after making changes to your domains zones...
In a recent post, Stephan Schmidt makes several suggestions in order to write "Next Generation Java". Unfortunately, I disagree with most of them
Let's say you have a gem which has the following module: # within the imaginary super gem module SuperClient def self.foo 'Foo' end def bar 'Bar' end end
...library extensions). Try to avoid it if possible. Add a lib/ext/super_client.rb to your project (see How to organize monkey patches in Ruby on Rails projects) Add the extension, which overrides...
...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'
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...
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...