tl;dr
The Chrome DevTools are a neat collection of tools for the daily work as a web developer. If you're lucky, you'll maybe find some handy stuff in here.
TLDR: sass >= 1.35.0 has the option quietDeps to silence deprecation warnings from dependencies.
quietDeps: If true, the compiler must not print deprecation warnings
for stylesheets that are transitively loaded through an import path or importer.
You might have seen deprecation warnings like this during assets compilation:
DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.
Recommendation: math.div($grid-gutter-width, 2)
More info and automated migrator: https://sass-la...
Git allows you to set push options when pushing a branch to the remote.
You can use this to build an alias that automatically pushes a branch and creates a merge request for it.
Put this in your ~/.gitconfig in the [alias] section:
mr = push origin HEAD -o merge_request.create -o merge_request.draft
Now you can do git mr and a draft merge request will be created.
Target branch is your project's default branch, i.e. main or master.
To specify a different target branch, add -o merge_request.target=other-branch.
[There...
Unpoly's [up-observe], [up-autosubmit] and [up-validate] as well as their programmatic variants up.observe() and up.autosubmit() are a nightmare for integration tests.
Tests are usually much faster than the configured up.form.config.observeDelay. Therefore, it may happen that you already entered something into the next field before unpoly updates that field with a server response, discarding your changes.
The steps I wait for active ajax requests to complete (if configured) and capybara-lockstep can catch some ...
tl;dr
git checkoutis the swiss army of git commands. If you prefer a semantically more meaningful command for restoring tasks, usegit restoreinstead.With this command you can ...
- ... do unstaging -
git restore --staged- ... discard staged changes -
git restore --staged --worktree- ... discard unstaged changes -
git restore- ... restore deleted files -
git restore- ... restore historic versions -
git restore --source- ... recreate merge conflicts -
git restore --merge- ... specifiy...
New versions of wkhtmltopdf dissallow file:// URLs by default. You can allow them by passing --enable-local-file-access.
If you are using PDFKit, set the option
PDFKit.configure do |config|
config.default_options = {
enable_local_file_access: true,
}
end
This will be necessary in many setups to allow wkhtmltopdf to fetch assets (such as stylesheets) from the filesystem.
Allowing this poses some risk when you render user input, since it might be feasible to include data from the local filesyste...
You have uncommited changes (you can always check by using git status), which you want to discard.
Now there are several options to discard these depending on your exact situation.
The headlines will differentiate the cases whether the files are staged or unstaged.
tl;dr
In RubyMine you can use find and replace with capture groups
(.*?)and backreferences$1(if you have several groups:$[Capture-Group ID]).
Named captures(?<text>.*)are also supported.
If you want to replace double quotes with single quotes, replacing every " with a ' is prone to errors. Regular expressions can help you out here.
.* icon next to the "find" field).The robots.txt file and <meta name="robots"> HTML tag can be used to control the behavior of search engine crawlers. Both have different effects.
Marking a URL path as "disallowed" in robots.txt tells crawlers to not access that path.
robots.txt is not a guarantee for exclusion from search engine results.
A "disallowed" URL might be known from an external link, and can still be displayed for a matching search.
Example: even if/adminis disallowed in robots.txt, `/admin/som...
Ruby's standard library includes a class for creating temporary directories. Similar to Tempfile it creates a unique directory name.
Note:
Dir.mktmpdir(['foo', 'bar']) => /tmp/foo20220912-14561-3g93n1bar
Dir.tmpdir e.g. `Dir.mktmpdir('foo', Rails.root.join('tmp')) => /home/user/rails_example/tmp/foo20220912-14...A memory leak is an unintentional, uncontrolled, and unending increase in memory usage. No matter how small, eventually, a leak will cause your process to run out of memory and crash.
If you have learned about a memory leak, looking at the number of Ruby objects by type can help you track it down:
> pp ObjectSpace.count_objects
{:TOTAL=>77855,
:FREE=>4526,
:T_OBJECT=>373,
:T_CLASS=>708,
:T_MODULE=>44,
:T_FLOAT=>4,
:T_STRING=>65685,
:T_REGEXP=>137,
:T_ARRAY=>984,
:T_HASH=>87,
:T_STRUCT=>12,
:T_BIGNUM=>2,
:T_FILE=>3,
:T_D...
When you build a JSON API you need to come up with a style to represent attributes, pagination, errors or including associated objects. Instead of reinventing the wheel, you may reuse successful API designs.
JSON:API specifies common features found in most JSON APIs, like pagination, ordering and nested resources. The spec looks very similar to how one would build an API with Rails and uses similar patterns. Even if you don't plan on supporting the whole spec, it can still make sense to know how th...
If you need to convert an SVG source to PS or EPS, the most common suggestion on the interwebs is to use Inkscape from the commandline.
Inkscape is a fairly resource-heavy tool with lots of dependencies. A great alternative for converting is CairoSVG.
CairoSVG is available on most Linux distros through their package management systems, e.g. apt install cairosvg on Ubuntu.
It has few dependencies (most importantly Python 3 and some related packages, but really not much)...
Working with a self-signed certificate is much easier, when the browser accepts it.
Warnings from chrome might not be accurate
Even though the certificate is working locally, chrome might still complain that the certificate is not valid and the connection is not secure while blotting out the "https" part of the url.
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 tedious: you need to remember it, and perform the few steps manually each time.
Enter Git hooks. The folks at Liquid Light have built a little post-merge hook that will delete a feature branch on confirmation....
When your Rails application offers downloading a bunch of files as ZIP archive, you basically have two options:
This card is about option 2, and it is actually fairly easy to set up.
We are using this to generate ZIP archives with lots of files (500k+) on the fly, and it works like a charm.
Offering downloads of large archives can be cumbersome:
Recently we detected a memory leak in one of our applications. Hunting it down, we found that the memory leak was located in Rails' #prepend_view_path. It occurs when the instance method prepend_view_path is called in each request, which is a common thing in a multi-tenant application.
On top of leaking memory, it also causes a performance hit, since templates rendered using the prepended view path will not be cached and compiled anew on each request.
This is not a new memory leak. It was [first reported in in 2014](https://github.com/...
To read the Rails session from a Rack middleware, use env['rack.session']. It's an ActionDispatch::Request::Session object.
class MyMiddlware
def initialize(app)
@app = app
end
def call(env)
status, headers, body = @app.call(env)
session = env['rack.session']
Rails.logger.info("Value of session['foo'] is: " + session['foo'].inspect)
[status, headers, body]
end
end
You may not be able to write to the session this way (I haven't tested this).
Issue: You have an app using jsbundling-rails and esbuild. After deploy, the assets built by esbuild are missing in public/assets.
Solution: Add app/builds to your git repo (by adding a app/builds/.keep file).
Something in sprockets is caching paths and refuses to accept files in "unknown" locations.
You can use the code below to check whether the browser can make connections to the current site:
await isOnline() // resolves to true or false
navigator.onLine
While you can use the built-in function navigator.onLine (sic), it is only a hint for whether the device can access the Internet.
When navigator.onLine === false you know for certain that the user device has no connection to the Internet. This mea...
When redirecting you should take care to use the right HTTP status code.
When redirecting from a controller, the default status code is 302 Found (aka Moved Temporarily):
red...
If you have a JS fiddle, you can open it in fullscreen by appending /show to the URL.
Example: https://jsfiddle.net/b275g910/3 => https://jsfiddle.net/b275g910/3/show
Testing file download links in an end-to-end test can be painful, especially with Selenium.
The attached download_helpers.rb provides a download_link method for your Capybara tests. It returns a hash describing the download's response:
details = download_link('Download report')
details[:disposition] # => 'attachment' or 'inline'
details[:filename] # => 'report.txt'
details[:text] # => file content as string
details[:content_type] # => 'text/plain'
Compared to [other approaches](...
When you are working with SVG files and ImageMagick you can get different results on different machines depending on which additional packages you have installed.
From: http://www.imagemagick.org/script/formats.php
ImageMagick utilizes inkscape if its in your execution path otherwise RSVG. If neither are available, ImageMagick reverts to its internal SVG renderer.