...HTML's accepts a single file. You can allow multiple files via . But sometimes, selecting multiple files is not enough and can be cumbersome for the user. Enter webkitdirectory:
...webkitdirectory switches the browser's file picker to select a directory. All files inside that directory, and inside any nested subdirectories, will be selected for the file input.
...status code 400) |_http-title: 400 The plain HTTP request was sent to HTTPS port | ssl-cert: Subject: commonName=www.makandracards.com/countryName=DE | Not valid before: 2015-10-14T12...
...Not valid after: 2016-10-14T12:42:03+00:00 |_ssl-date: 2016-08-05T11:33:52+00:00; +9d23h48m18s from local time. | tls-nextprotoneg: | h2
Here is a bash script that I use to auto-configure displays on Ubuntu 24.04 with Xorg. Background Ubuntu always sets the primary display to the 1st (i.e. internal) display...
...bottom-aligned (the default would be aligned at their top edges). As an oddly specific bonus (you may not need this), I adjust my internal display's resolution when connected...
...number of different versions for Ruby, Rails and many gems. To be able to switch between projects easily, we must control every dependency our applications has. Goals Understand what a...
...with their dependencies and version history. Bundler overview and workflow How to update a single gem conservatively: A major bundler caveat How to manage versions in a Gemfile
...method to automatically compute an ETag from the given record, array of records or scope of records: class UsersController < ApplicationController def show @user = User.find(params[:id]) fresh_when @user
...by passing an array of ETaggable objects to fresh_when. class UsersController < ApplicationController def show @user = User.find(params[:id]) # The show template also renders the user's posts. fresh_when...
The git doc states on the difference of these two commands: git-restore[1] is about restoring files in the working tree from either the index or another commit. This...
...The command can also be used to restore the content in the index with --staged, or restore both the working tree and the index with --staged --worktree. By default, if...
When restoring a barman PITR backup you may encounter this error: Copying required WAL segments. EXCEPTION: {'ret': 2, 'err': '/bin/sh: 1: cannot open /var/lib/barman/foopostgres/wals/00000007.history: No such file\n', 'out': ''}
...present in the wals directory of your backup. The most likely reason is that someone deleted this file in the past. If you do not need this file for restoring...
Embedding videos on a website is very easy, add a tag to your source code and it just works. Most of the time. The thing is: Both the operating...
...an 0.x version and has quite some development dependencies. It has the Apache license. streamio-ffmpeg seems to be perfect, but had its last release in 2016. It offers...
...consider processing your images with libvips instead of ImageMagick. Reasons for libvips There are several upsides to using libvips over ImageMagick: libvips is considerably faster and uses less memory.
...has a large attack surface that has repeatedly caused security incidents in the past (compare ImageMagick CVEs with libvips CVEs). Ubuntu is sometimes slow to fix the numerous ImageMagick vulnerabilities...
When you need test images, instead of using services like lorempixel or placehold.it you may generate test images yourself. Here we build a simple SVG image and wrap it into...
...a data: URI. All browsers support SVG, and you can easily adjust it yourself. Simply set it as an image's src attribute. JavaScript Simple solution in modern JavaScript, e.g...
Most forms have a single submit button that will save the record when pressed. Sometimes a form needs additional submit buttons like "accept" or "reject". Such buttons usually attempt...
...a state transition while updating the record. To process a form with multiple buttons, your server-side code will need to know which button was pressed. To do so you...
View specs are a powerful tool to test several rendering paths by their cases instead of using a more costing feature spec. This is especially useful because they become quite...
...used with Capybara::Node::Finders and Capybara::RSpecMatchers. This allows to wirte view unit specs as you can isolate specific parts of the rendered view and then use readable and...
...However, you need to be aware of the overall transaction nesting constellation, because creating proper sub-transactions can lead to unwanted or too early triggering of after_commit callbacks:
...project> Country.first.name # => "Afghanistan will not change" Wait. What happened to the rollback in the after_save-callback? From the Rails docs: Transaction calls can be nested. By default, this makes...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking") API print('script start') html = get('/foo') print(html)
Script outputs 'script start', (long delay), '...
...', 'script end'. Talking to asynchronous (or "evented") API print('script start') get('foo', done: function(html) { print(html) }) print('script end')
Matching the "space" character class For matching whitespaces in a regular expression, the most common and best-known shorthand expression is probably \s. It matches the following whitespace characters:
...in some cases these may not be good enough for your purpose. Non-breaking spaces (nbsp) Sometimes a text may contain two words separated by a space, but the author...
Any form fields where users enter numbers should be an . Numeric inputs have several benefits over : On mobile or tablet devices, number fields show a special virtual keyboard that shows...
...mostly digit buttons. Decimal values will be formatted using the user's language settings. For example, German users will see 1,23 for . Values in the JavaScript API or when...
In this card we will learn to write code that scales with a large number of database records. We will do this by pushing work out of Ruby and into...
...a scope of movies matching the following query format: The query is a list of space-separated words that all need to appear in the movie title for the movie...
Note: Consider using MATE instead of Gnome 3 on newer system Awesome is a very good tiling window manager that provides neat features like automatic layouting of windows, good multi...
Improve your font-rendering Copy /etc/xdg/awesome/rc.lua to ~/.config/awesome/rc.lua. Take a look, it's pretty self-explanatory. You can instantly apply changes by reloading Awesome with Meta-Ctrl-R.
...update your window title whenever you switch directories, simply specify a PROMPT_COMMAND environment variable. set-window-title() { echo -en "\033]0;$(pwd | sed -e "s;^$HOME;~;")\a" } if [[ "$PROMPT...
...COMMAND" ]]; then export PROMPT_COMMAND="$PROMPT_COMMAND;set-window-title" else export PROMPT_COMMAND=set-window-title fi You may put that into your ~/.bashrc to persist and automatically activate...
RAG is often equated with vector databases, embeddings, and semantic search. But RAG ("Retrieval-Augmented Generation") really is just 'put relevant data in the prompt' — the retrieval mechanism is up...
...to you. If your app already has any working search functionality, you can build a useful RAG pipeline with it. Semantic search can still be included later on, if really...
...chat messages, and it will load them into its context for analysis. Note For scanned pages that may be sideways or upside down, auto-rotate them first. Autocrop assumes upright...
...px so text remains readable. To convert PDF pages to scaled down images: pdftoppm -png -scale-to 1500 input.pdf output_prefix Convert images to thumbnails: vipsthumbnail input.png --size 1500x1500 -o...
...is hard coded. A popular example is extension_allowlist, which returns an array of strings and let's you only upload files that have a filename with an extension that...
...matches an entry in that array. Another useful validation can be size_range, which gives you a little bit of control over how your storage gets polluted.
This card compares patterns to store trees in a relation database like MySQL or PostgreSQL. Implementation examples are for the ActiveRecord ORM used with Ruby on Rails, but the techniques...
We will be using this example tree (from the acts_as_nested_set docs): root | +-- Child 1 | | | +-- Child 1.1 | | | +-- Child 1.2 | +-- Child 2 | +-- Child 2.1 | +-- Child 2.2
Stepping forward from JavaScript Basics, the goal of this card is for you to be able to read and write more complex ES6+ code. The JavaScript Object Model
...s also a video of that talk in our internal library. The first three sections of the article Inheritance and the prototype chain on mdn also gives a good introduction...