This example lets you edit a selection of values from an editable enumSource. The selection must have unique items, which is useful to showcase an issue where any changes to ordering of the enumSource array reset selections to a start value.


Tesla’s new Cybertruck has arrived
by Staff WriterElon Musk has unveiled Tesla’s new Cybertruck – an electric pickup truck which will retail from $39,900 (R588,332).
While the launch event was marred as the vehicle’s shatterproof windows broke, critics were ultimately impressed by the Cybertruck’s specifications.
Musk said that the Cybetruck’s powerful drivetrain and low-centre-of gravity provides extraordinary traction control and torque – enabling acceleration from 0-60 mph in as little as 2.9 seconds and up to 500 miles of range.
Other features include:
- Exoskeleton – A smooth monochrome exoskeleton that puts the shell on the outside of the car and provides you and your passengers maximum protection;
- Tesla armour glass – Ultra-strong glass and polymer-layered composite can absorb and redirect impact force for improved performance and damage tolerance;
- Utility – Up to 3,500 pounds of payload capacity and adjustable air suspension, and engineered with 100 cubic feet of exterior, lockable storage;
- Towing – Tesla said that the Cybbertruck has the ability to pull ‘near infinite mass’ and a towing capability of over 14,000 pounds;
- Adaptive air suspension – Raise and lower suspension four inches in either direction for easy access to Cybertruck or the vault, while self-levelling capabilities adapt to any occasion and assist with every job;
- Interior – Seat six comfortably with additional storage under the second-row seats. Complete with an advanced 17” touchscreen with an all-new customized user interface.


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jQuery
jQuery is a fast, small, and feature-rich JavaScript library.
For information on how to get started and how to use jQuery, please see jQuery’s documentation. For source files and issues, please visit the jQuery repo.
If upgrading, please see the blog post for 3.4.1. This includes notable differences from the previous version and a more readable changelog.
Including jQuery
Below are some of the most common ways to include jQuery.
Browser
Script tag
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
Babel
Babel is a next generation JavaScript compiler. One of the features is the ability to use ES6/ES2015 modules now, even though browsers do not yet support this feature natively.
import $ from "jquery";
Browserify/Webpack
There are several ways to use Browserify and Webpack. For more information on using these tools, please refer to the corresponding project’s documention. In the script, including jQuery will usually look like this…
var $ = require("jquery");
AMD (Asynchronous Module Definition)
AMD is a module format built for the browser. For more information, we recommend require.js’ documentation.
define(["jquery"], function($) {
});
Node
To include jQuery in Node, first install with npm.
npm install jquery
For jQuery to work in Node, a window with a document is required. Since no such window exists natively in Node, one can be mocked by tools such as jsdom. This can be useful for testing purposes.
require("jsdom").env("", function(err, window) {
if (err) {
console.error(err);
return;
}
var $ = require("jquery")(window);
});


Media Complete
Play music and restore your missing metadata
Release 0.1.2
- Bug fix: We added some handling for many of the errors that were causing app crashes
- Increased load-time performance
- Bug fix: Fixed an issue where a first-time install would not allow the user to use the application
- Bug fix: Double clicking on a folder in the library will now play the music within that folder
What is Media Complete?
Media Complete is a desktop application for Windows that quickly and easily allows you to manage a library of music.
What can I do with Media Complete?
- Sort music files, with configurable settings
- Quickly edit file metadata
- Find missing metadata information
- Automatically import and sort music
- Listen to music
- Create and manage playlists
What will be added to Media Complete?
- Search for music in your library
- Stream songs from YouTube
- Search for songs on YouTube
- Additional playlist controls
- Full media player controls
- Anything else we can think of!


The original boto.rds module has historically lagged quite far behind the service (at time of writing, almost 50% of the API calls are missing/out-of-date). To address this, the Boto core team has switched to a generated client for RDS (boto.rds2.layer1.RDSConnection).
However, this generated variant is not backward-compatible with the older boto.rds.RDSConnection. This document is to help you update your code (as desired) to take advantage of the latest API calls.
For the duration of the document, RDS2Connection refers to boto.rds2.layer1.RDSConnection, where RDSConnection refers to boto.rds.RDSConnection.
Format is old_method_name -> new_method_name:
Many parameter names have changed between RDSConnection & RDS2Connection. For instance, the old name for the instance identifier was id, where the new name is db_instance_identifier. These changes are to ensure things map more closely to the API.
In addition, in some cases, ordering & required-ness of parameters has changed as well. For instance, in create_db_instance, the engine parameter is now required (previously defaulted to MySQL5.1) & its position in the call has change to be before master_username.
As such, when updating your API calls, you should check the API Reference documentation to ensure you’re passing the correct parameters.
RDSConnection frequently returned higher-level Python objects. In contrast, RDS2Connection returns Python dictionaries of the data. This will require a bit more work to extract the necessary values. For example:
# Old
>>> instances = rds1_conn.get_all_dbinstances()
>>> inst = instances[0]
>>> inst.name
'test-db'
# New
>>> instances = rds2_conn.describe_db_instances()
>>> inst = instances['DescribeDBInstancesResponse']\
... ['DescribeDBInstancesResult']['DBInstances'][0]
>>> inst['DBName']
'test-db'


[1]
available at the airport information desk and it 's cheapest way to travel in the city .
[2]
downstairs of the aparthotel and it 's very convenient to eat out or to go shopping .


Forms
Forms are different from other HTML elements. They keep track of their state through properties such as value
, checked
, etc.
As an example, let's use the following form. We're going to want to keep track of the value of the input when the user types:
<form>
<label>
Name:<input type="text">
</label>
<input type="submit" value="Submit">
</form>
We will need to create the form with the render
function of a class component. We'll track the input changes with an inline event for now. We'll give the form
element a onsubmit
event handler.
See the Pen Composi Tuts - Forms-1 by Robert Biggs (@rbiggs) on CodePen.
Now the state of the form is owned by the component. As the user enters data in the input, it value is being set on the component's state. This keeps the component state insynch with the form at all times.
You can use this same technique on textareas, checkboxes, radio buttons, etc. to keep track of their state in a component.
The Select Tag
This one is a bit tricky. That's because its selection is determined by the value of its selectedIndex
property. Let's look at the follow example where are form has a select tag. We want to render it with a default value other than the first options. We want it to render showing Coconut" as the selection:
See the Pen Composi Tuts - Forms-2 by Robert Biggs (@rbiggs) on CodePen.
We've set the default value as "coconut" in the state assignment in the class constructor. With this you would expect to see that as the choice when the component renders. However, that is not what happens. The select tag renders showing the first option: "Grapefuit". However, if we click on the button, it alerts "Your favorite flavor is: coconut". Just what we would expect. Why isn't the correct selection showing. That's because of the select tag's property of selectedIndex
. That property determines what option is shown.
What Went Wrong
So why doesn't this work? Because of how we rendered the select tag. Rendering it with a value does not cause the selectedIndex
to be set. Normally, if you set the value of a select tag, that will trigger setting the correct selectedIndex
value. In this case, there was no setting of the value. We rendered the select tag to the DOM with the value. That's why we can alert the value.
Call in the LifeCycle Hook!
If you want to show a selection other than the default first option, you will need to do so right after the component is create. For this you can take advantage of the component's lifecylcy hook: componentWasCreate
. You can use that to set the value of the select:
componentDidMount() {
// Set the value of the component's select tag,
// after the component was created:
this.element.querySelector('select').value = this.state.value
}
When we add the above method to the component, the select tag renders showing the default value of "Coconut". Setting the select tag's state in the componentDidMount
hook causes the selectedIndex
value to also be set. Problem solved:
See the Pen Composi Tuts - Forms-3 by Robert Biggs (@rbiggs) on CodePen.
Setting Default Values
You can also use the componentWasCreate
lifecycle hook to set the default values on form elements. Remember, you can easily query any child elements in a component through its this.element
property, just as we did above to get the select tag.
Handling a Form with Many Inputs
If a form has a lot of inputs, trying to keep tract of all of them in your component's state can be difficult. In such a case you want to take another route. Don't bother trying to control the form state with the component state. Let the form be. Instead, at submit time, gather up all the form inputs and then set them to the form's state.
Let's take our previous example of NameForm
and make it work without tracking the input value. Instead we'll just get the value of the input and use that. We can get the input through the component's element
property. In the following form we are going to track the value of a checkbox and input. When their state changes, we will output the changes below:
See the Pen Composi Tuts - Forms-4 by Robert Biggs (@rbiggs) on CodePen.


Welcome to {{ .Site.Params.page }}!
This site is dedicated to data, research, and my personal crafts.
You can find tutorials on various programs, research about the benefits of yoga, information about me, and my research.
Contact me using the linked logo images below or visit the ReLearn Lab website, where I recently completed my Ph.D., applying and simplifing machine learning algorithms by computer scientists for cognitive neuroscientists.
You can also check out my Etsy for my cross stitch patterns.
{{ partial "social.html" . }}


Yemen's prime minister lands in southern port city of Aden, marking government's return under ...
by EndPlayADEN, Yemen - ADEN, Yemen (AP) - Yemen's prime minister lands in southern port city of Aden, marking government's return under deal with separatists.


participate, organize and judge hackathons on Hackton. We have the tools to make you succeed.
We have awesome features that will make taking part in hackathon fun again
Pascal Ulor
Mariam Adedeji
Justinas Vebra
Mike Attara
Mildred Otieno
Ayomide Jones
Premier hackathon that brings the best of dev talent in the world.
Premier hackathon that brings the best of dev talent in Nigeria.
Join us for an amazing hackathon in 2019.


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RevolutionUC is a student hackathon in which we invite students from across the midwest to partake in a weekend of code, community, and self-improvement. You don't have to attend the University of Cincinnati and you don't have to be a computer science major or engineering student. We're looking for people who share our passion to do awesome things with technology.
Projects are one of the key elements in any hackathon. At RevolutionUC, you have 36 hours to create something awesome from start to finish with your team. We’ve seen awesome mobile apps, web applications, and hardware hacks in the past and we’re excited to see what will be made this spring.
Learning is essential to a hackathon. Whether you’re a veteran hacker or a first-timer, we’re excited for you to learn something new! We’ll have exciting tech talks throughout the event and we encourage all our attendees to learn something
new!
New to the hackathon scene? Awesome! We’re excited to have you. We’re more than willing to help you get you started with your first hack! With our team of mentors, assembled from our organizer team and software engineers from our sponsors,
we’ll help get you started and get you past the bugs and bumps.
Hackathons are more than just a competition or showcase of technical skill. At RevolutionUC, we strive to create an all-inclusive community that acts as an outlet in which we can join our peers and share our passion for all the incredible things that can be done through programming. We’re excited to share this ethos with all of our attendees and come together to grow the hacker community here in Cincinnati.
8pm - Opening Ceremony
10pm - Idea forming workshop and team building.
11pm - Hacking begins.
 Hacking ends.
12pm - Show us what you hacked at the project expo.
2pm - Closing ceremony
Nope! We'll be hosting an idea generation and team building workshop to help people think of ideas to work on at the hackathon. So you should sign up regardless.
We will have a top shelf team of veteran mentors to help you hit the ground running with ideas and guidance, plenty of opportunities to engage other talented and curious individuals like yourself and of course lots and lots of fun events right when you hit that rough patch. RevolutionUC is a learning and sociable experience for people of all experience levels.
Check out some of the awesome submissions we had in the past!
We will have a space near our hacking area set aside for attendees that want to sleep. We'll be buying large amounts of Red Bull and other caffeinated drinks so hopefully you won't have to.
Parking will be in the USquare East Garage
Interested in sponsoring? Need to know more? Get in touch with us at info@revolutionuc.com


You must initiate a WebSocket connection with the message bus.
Add a button to both the profile and IM modules. This only places the button and does not set up a handler for when the button is clicked.
To receive notifications when the UI button is executed you must register an interest on the topic. Note the address property matches the data.responseAddress field of the above method. After you register you can then click the button in the UI to see a log in the console printed.
This example shows a banner announcement across the top of the UI.
You can also start a conversation with a predefined initial message. Note this API call can take a few seconds to reflect in the UI.
Kill the WebSocket connection if you no longer need to interact with Symphony.


odsGist
ods-widgets
The odsGist widget integrates a GitHub Gist widget with a "copy to clipboard" button into a page.
<ods-gist username="{string}" gist-id="{string}"> </ods-gist>
The GitHub username
The Gist identifier. See the Gist URL to find it.


If you are currently evacuated, please start an Evacuation File.
Completing this now will save you time when you meet with an Emergency Support Services (ESS) Volunteer.
There are no current evacuations.
There are no past evacuations.


TRACEPATH(8) System Manager's Manual: iputils TRACEPATH(8) NAME tracepath, tracepath6 - traces path to a network host discovering MTU along this path SYNOPSIS tracepath [-n] [-b] [-l pktlen] destination [port] DESCRIPTION It traces path to destination discovering MTU along this path. It uses UDP port port or some random port. It is similar to traceroute, only does not require superuser privileges and has no fancy options. tracepath6 is good replacement for traceroute6 and classic example of application of Linux error queues. The situation with IPv4 is worse, because commercial IP routers do not return enough information in icmp error messages. Probably, it will change, when they will be updated. For now it uses Van Jacobson's trick, sweeping a range of UDP ports to maintain trace history. OPTIONS -n Print primarily IP addresses numerically. -b Print both of host names and IP addresses. -l Sets the initial packet length to pktlen instead of 65536 for tra‐ cepath or 128000 for tracepath6. OUTPUT root@mops:~ # tracepath6 3ffe:2400:0:109::2 1?: [LOCALHOST] pmtu 1500 1: dust.inr.ac.ru 0.411ms 2: dust.inr.ac.ru asymm 1 0.390ms pmtu 1480 2: 3ffe:2400:0:109::2 463.514ms reached Resume: pmtu 1480 hops 2 back 2 The first column shows TTL of the probe, followed by colon. Usually value of TTL is obtained from reply from network, but sometimes reply does not contain necessary information and we have to guess it. In this case the number is followed by ?. The second column shows the network hop, which replied to the probe. It is either address of router or word [LOCALHOST], if the probe was not sent to the network. The rest of line shows miscellaneous information about path to the cor‐ respinding hetwork hop. As rule it contains value of RTT. Additionally, it can show Path MTU, when it changes. If the path is asymmetric or the probe finishes before it reach prescribed hop, difference between number of hops in forward and backward direction is shown following keyword async. This information is not reliable. F.e. the third line shows asym‐ metry of 1, it is because the first probe with TTL of 2 was rejected at the first hop due to Path MTU Discovery. The last line summarizes information about all the path to the destina‐ tion, it shows detected Path MTU, amount of hops to the destination and our guess about amount of hops from the destination to us, which can be different when the path is asymmetric. SEE ALSO traceroute(8), traceroute6(8), ping(8). AUTHOR tracepath was written by Alexey Kuznetsov<EMAIL_ADDRESS>SECURITY No security issues. This lapidary deserves to be elaborated. tracepath is not a privileged program, unlike traceroute, ping and other beasts of this kind. tra‐ cepath may be executed by everyone who has some access to network, enough to send UDP datagrams to investigated destination using given port. AVAILABILITY tracepath is part of iputils package and the latest versions are avail‐ able in source form at http://www.skbuff.net/iputils/iputils-cur‐ rent.tar.bz2. iputils-101006 12 April 2011 TRACEPATH(8)


The team working on Yomiwa and its sister applications is committed to privacy. However in order to provide quality software, we do collect some information. This page aims at explaining which information we gather in Yomiwa and Hanyou (the app), which permissions the app uses, how and why we do that, and how you can opt out of it.
The app requires access to your device's storage. This permission is needed to import images in the app. We do not use it to scan your phone or read any file that you didn't specified yourself to the app.
In newer versions of Android, you can disable this permission from your device's settings. If you disable it, the app will continue to function normally, except that the import mode will be disabled.
The app also requires access to your device's camera. This permission is needed for the camera mode and the photo import mode. The app only uses the camera in the camera mode and the picture import mode. If you do not see the camera preview on the screen, it means that the app is not using it.
In newer versions of Android, you can disable this permission from your device's settings. If you disable it, the app will continue to function normally, except that the camera mode will be disabled and you will not be able to take a picture and directly import it from within the app.
The app uses permissions to access the internet network. This permission is needed for downloading additional databases and for Google Analytics (see next section). The app doesn't need you to be connected to internet to work.
All payments are handled by the google play store app. For each transaction, we get information on which feature it was for, for how much and where it was made. We do not get any identification information about you (name, age, e-mail address...). The app knows whether or not you own a feature by asking the google play store.


EXA
Section: Devices and Network Interfaces (4)Updated: xorg-server 1.10.6
Index Return to Main Contents
NAME
exa - new 2D acceleration architecture for X.OrgDESCRIPTION
EXA provides a simple API for video drivers to implement for 2D acceleration. It is a module loaded by drivers, and is not intended to be loaded on its own. See your driver's manual page for how to enable EXA.The EXA architecture is designed to make accelerating the Render extension simple and efficient, and results in various performance tradeoffs compared to XAA. Some xorg.conf options are available for debugging performance issues or driver rendering problems. They are not intended for general use.
- Option N'34'EXANoCompositeN'34' N'34'booleanN'34'
- Disables acceleration of the Composite operation, which is at the heart of the Render extension. Not related to the Composite extension. Default: No.
- Option N'34'EXANoUploadToScreenN'34' N'34'booleanN'34'
- Disables acceleration of uploading pixmap data to the framebuffer. Default: No.
- Option N'34'EXANoDownloadFromScreenN'34' N'34'booleanN'34'
- Disables acceleration of downloading of pixmap data from the framebuffer. NOTE: Not usable with drivers which rely on DownloadFromScreen succeeding. Default: No.
- Option N'34'MigrationHeuristicN'34' N'34'anystrN'34'
- Chooses an alternate pixmap migration heuristic, for debugging purposes. The default is intended to be the best performing one for general use, though others may help with specific use cases. Available options include N'34'alwaysN'34', N'34'greedyN'34', and N'34'smartN'34'. Default: always.
SEE ALSO
Xorg(1), xorg.conf(5).AUTHORS
Authors include: Keith Packard, Eric Anholt, Zack Rusin, and Michel D:anzer
Index
This document was created by man2html, using the manual pages.
Time: 05:33:53 GMT, December 24, 2015


A new plugin, Spincast Logback Utils is now available. This small plugin allows you to easily configure Logback, for logging purposes in your application.
Using plain Java code, you can specify which configuration file Logback should be configured with, for example depending on the environment the application runs on! The plugin also allows you to tweak the content of the configuration file, for example by replacing some placeholders.


CLICK THE NODES
Power the reaction bar before the time runs out by clicking on the lit nodes before they decay. The faster you get the nodes, the more charge will be added to the reaction bar.
next
COLLECT POWER UPS
Collect various powerups to help you win. There are three types. Shrink the grid, add extra time +2s and instant full multiplier!
next
GET COMBOS
Increase your multiplier by hitting nodes consistently. The more you get in a row, the higher your multiplier will be. However, if you miss a node your multiplier is reset!
lets go


Target, problem solved. Hit a localish “farm brewery” after work and grabbed some filler beers.
Really wanted to get you a growler of gin barrel grisette (for google doc reasons) that they had on draft but it wasn’t good enough for you.
Sender:
Target, problem solved. Hit a localish “farm brewery” after work and grabbed some filler beers.
Really wanted to get you a growler of gin barrel grisette (for google doc reasons) that they had on draft but it wasn’t good enough for you.
Sender:


DO NOT READ THIS FILE ON GITHUB, GUIDES ARE PUBLISHED ON https://guides.rubyonrails.org.
Ruby on Rails
6.0 Release Notes
Highlights in Rails
6.0:
- Action Mailbox
- Action Text
- Parallel Testing
- Action Cable Testing
These release notes cover only the major changes. To learn about various bug
fixes and changes, please refer to the change logs or check out the list of
commits in the main Rails
repository on GitHub.
Upgrading to Rails
6.0
If you're upgrading an existing application, it's a great idea to have good test
coverage before going in. You should also first upgrade to Rails
5.2 in case you
haven't and make sure your application still runs as expected before attempting
an update to Rails
6.0. A list of things to watch out for when upgrading is
available in the
Upgrading Ruby on Rails
guide.
Major Features
Action Mailbox
Action Mailbox allows you to route incoming emails to controller-like mailboxes. You can read more about Action Mailbox in the Action Mailbox Basics guide.
Action Text
Action Text
brings rich text content and editing to Rails
. It includes
the Trix editor that handles everything from formatting
to links to quotes to lists to embedded images and galleries.
The rich text content generated by the Trix editor is saved in its own
RichText model that's associated with any existing Active Record model in the application.
Any embedded images (or other attachments) are automatically stored using
Active Storage and associated with the included RichText model.
You can read more about Action Text in the Action Text Overview guide.
Parallel Testing
Parallel Testing allows you to parallelize your test suite. While forking processes is the default method, threading is supported as well. Running tests in parallel reduces the time it takes your entire test suite to run.
Action Cable Testing
Action Cable testing tools allow you to test your Action Cable functionality at any level: connections, channels, broadcasts.
Railties
Please refer to the Changelog for detailed changes.
Removals
Remove deprecated
after_bundle
helper inside plugins templates. (Commit)Remove deprecated support to
config.ru
that uses the application class as argument ofrun
. (Commit)Remove deprecated
environment
argument from the rails commands. (Commit)Remove deprecated
capify!
method in generators and templates. (Commit)Remove deprecated
config.secret_token
. (Commit)
Deprecations
Deprecate passing
Rack
server name as a regular argument torails server
. (Pull Request)Deprecate support for using
HOST
environment to specify server IP. (Pull Request)Deprecate accessing hashes returned by
config_for
by non-symbol keys. (Pull Request)
Notable changes
Add an explicit option
--using
or-u
for specifying the server for therails server
command. (Pull Request)Add ability to see the output of
rails routes
in expanded format. (Pull Request)Run the seed database task using inline Active Job adapter. (Pull Request)
Add a command
rails db:system:change
to change the database of the application. (Pull Request)Add
rails test:channels
command to test only Action Cable channels. (Pull Request)Introduce guard against DNS rebinding attacks. (Pull Request)
Add ability to abort on failure while running generator commands. (Pull Request)
Make Webpacker the default JavaScript compiler for
Rails
6. (Pull Request)Add multiple database support for
rails db:migrate:status
command. (Pull Request)Add ability to use different migration paths from multiple databases in the generators. (Pull Request)
Add support for multi environment credentials. (Pull Request)
Make
null_store
as default cache store in test environment. (Pull Request)
Action Cable
Please refer to the Changelog for detailed changes.
Removals
- Replace
ActionCable.startDebugging()
andActionCable.stopDebugging()
withActionCable.logger.enabled
. (Pull Request)
Deprecations
- There are no deprecations for Action Cable in
Rails
6.0.
Notable changes
Add support for the
channel_prefix
option for PostgreSQL subscription adapters incable.yml
. (Pull Request)Allow passing a custom configuration to
::ActionCable::Server::Base
. (Pull Request)Add
:action_cable_connection
and:action_cable_channel
load hooks. (Pull Request)Add
Channel::Base#broadcast_to
andChannel::Base.broadcasting_for
. (Pull Request)Close a connection when calling
reject_unauthorized_connection
from an::ActionCable::Connection
. (Pull Request)Convert the Action Cable JavaScript package from CoffeeScript to ES2015 and publish the source code in the npm distribution. (Pull Request)
Move the configuration of the WebSocket adapter and logger adapter from properties of
ActionCable
toActionCable.adapters
. (Pull Request)Add an
id
option to the Redis adapter to distinguish Action Cable's Redis connections. (Pull Request)
Action Pack
Please refer to the Changelog for detailed changes.
Removals
Remove deprecated
fragment_cache_key
helper in favor ofcombined_fragment_cache_key
. (Commit)Remove deprecated methods in
::ActionDispatch::TestResponse
:#success?
in favor of#successful?
,#missing?
in favor of#not_found?
,#error?
in favor of#server_error?
. (Commit)
Deprecations
Deprecate
ActionDispatch::Http::ParameterFilter
in favor of::ActiveSupport::ParameterFilter
. (Pull Request)Deprecate controller level
force_ssl
in favor ofconfig.force_ssl
. (Pull Request)
Notable changes
Change ActionDispatch::Response#content_type returning Content-Type header as it is. (Pull Request)
Raise an
ArgumentError
if a resource param contains a colon. (Pull Request)Allow ActionDispatch::SystemTestCase.driven_by to be called with a block to define specific browser capabilities. (Pull Request)
Add
::ActionDispatch::HostAuthorization
middleware that guards against DNS rebinding attacks. (Pull Request)Allow the use of
parsed_body
in::ActionController::TestCase
. (Pull Request)Raise an
ArgumentError
when multiple root routes exist in the same context withoutas:
naming specifications. (Pull Request)Allow the use of
#rescue_from
for handling parameter parsing errors. (Pull Request)Add ActionController::Parameters#each_value for iterating through parameters. (Pull Request)
Encode Content-Disposition filenames on
send_data
andsend_file
. (Pull Request)Expose ActionController::Parameters#each_key. (Pull Request)
Add purpose and expiry metadata inside signed/encrypted cookies to prevent copying the value of cookies into one another. (Pull Request)
Raise
::ActionController::RespondToMismatchError
for conflictingrespond_to
invocations. (Pull Request)Add an explicit error page for when a template is missing for a request format. (Pull Request)
Introduce ActionDispatch::DebugExceptions.register_interceptor, a way to hook into DebugExceptions and process the exception, before being rendered. (Pull Request)
Output only one Content-Security-Policy nonce header value per request. (Pull Request)
Add a module specifically for the
Rails
default headers configuration that can be explicitly included in controllers. (Pull Request)Add
#dig
to::ActionDispatch::Request::Session
. (Pull Request)
Action View
Please refer to the Changelog for detailed changes.
Removals
Remove deprecated
image_alt
helper. (Commit)Remove an empty
RecordTagHelper
module from which the functionality was already moved to therecord_tag_helper
gem. (Commit)
Deprecations
Deprecate
ActionView::Template.finalize_compiled_template_methods
with no replacement. (Pull Request)Deprecate
config.action_view.finalize_compiled_template_methods
with no replacement. (Pull Request)Deprecate calling private model methods from the
options_from_collection_for_select
view helper. (Pull Request)
Notable changes
Clear Action View cache in development only on file changes, speeding up development mode. (Pull Request)
Move all of the
Rails
npm packages into a@rails
scope. (Pull Request)Only accept formats from registered MIME types. (Pull Request, Pull Request)
Add allocations to the template and partial rendering server output. (Pull Request)
Add a
year_format
option todate_select
tag, making it possible to customize year names. (Pull Request)Add a
nonce: true
option forjavascript_include_tag
helper to support automatic nonce generation for a Content Security Policy. (Pull Request)Add a
action_view.finalize_compiled_template_methods
configuration to disable or enable::ActionView::Template
finalizers. (Pull Request)Extract the JavaScript
confirm
call to its own, overridable method inrails_ujs
. (Pull Request)Add a
action_controller.default_enforce_utf8
configuration option to handle enforcing UTF-8 encoding. This defaults tofalse
. (Pull Request)Add I18n key style support for locale keys to submit tags. (Pull Request)
Action Mailer
Please refer to the Changelog for detailed changes.
Removals
Deprecations
Deprecate
ActionMailer::Base.receive
in favor of Action Mailbox. (Commit)Deprecate
DeliveryJob
andParameterized::DeliveryJob
in favor ofMailDeliveryJob
. (Pull Request)
Notable changes
Add
MailDeliveryJob
for delivering both regular and parameterized mail. (Pull Request)Allow custom email delivery jobs to work with the Action Mailer test assertions. (Pull Request)
Allow specifying a template name for multipart emails with blocks instead of using just the action name. (Pull Request)
Add
perform_deliveries
to payload ofdeliver.action_mailer
notification. (Pull Request)Improve the logging message when
perform_deliveries
is false to indicate that sending of emails was skipped. (Pull Request)Allow calling
assert_enqueued_email_with
without block. (Pull Request)Perform the enqueued mail delivery jobs in the
assert_emails
block. (Pull Request)Allow
::ActionMailer::Base
to unregister observers and interceptors. (Pull Request)
Active Record
Please refer to the Changelog for detailed changes.
Removals
Remove deprecated
#set_state
from the transaction object. (Commit)Remove deprecated
#supports_statement_cache?
from the database adapters. (Commit)Remove deprecated
#insert_fixtures
from the database adapters. (Commit)Remove deprecated
ActiveRecord::ConnectionAdapters::SQLite3Adapter#valid_alter_table_type?
. (Commit)Remove support for passing the column name to
sum
when a block is passed. (Commit)Remove support for passing the column name to
count
when a block is passed. (Commit)Remove support for delegation of missing methods in a relation to
Arel
. (Commit)Remove support for delegating missing methods in a relation to private methods of the class. (Commit)
Remove support for specifying a timestamp name for
#cache_key
. (Commit)Remove deprecated
ActiveRecord::Migrator.migrations_path=
. (Commit)Remove deprecated
expand_hash_conditions_for_aggregates
. (Commit)
Deprecations
Deprecate mismatched case-sensitivity collation comparisons for uniqueness validator. (Commit)
Deprecate using class level querying methods if the receiver scope has leaked. (Pull Request)
Deprecate
config.active_record.sqlite3.represent_boolean_as_integer
. (Commit)Deprecate passing
migrations_paths
toconnection.assume_migrated_upto_version
. (Commit)Deprecate
ActiveRecord::Result#to_hash
in favor of ActiveRecord::Result#to_a. (Commit)Deprecate methods in
DatabaseLimits
:column_name_length
,table_name_length
,columns_per_table
,indexes_per_table
,columns_per_multicolumn_index
,sql_query_length
, andjoins_per_query
. (Commit)Deprecate
update_attributes
/!
in favor ofupdate
/!
. (Commit)
Notable changes
Bump the minimum version of the
sqlite3
gem to 1.4. (Pull Request)Add
rails db:prepare
to create a database if it doesn't exist, and run its migrations. (Pull Request)Add
after_save_commit
callback as shortcut forafter_commit :hook, on: [ :create, :update ]
. (Pull Request)Add
ActiveRecord::Relation#extract_associated
for extracting associated records from a relation. (Pull Request)Add
ActiveRecord::Relation#annotate
for adding SQL comments to::ActiveRecord::Relation
queries. (Pull Request)Add support for setting Optimizer Hints on databases. (Pull Request)
Add
insert_all
/insert_all!
/upsert_all
methods for doing bulk inserts. (Pull Request)Add
rails db:seed:replant
that truncates tables of each database for the current environment and loads the seeds. (Pull Request)Add
reselect
method, which is a short-hand forunscope(:select).select(fields)
. (Pull Request)Add negative scopes for all enum values. (Pull Request)
Add
#destroy_by
and#delete_by
for conditional removals. (Pull Request)Add the ability to automatically switch database connections. (Pull Request)
Add the ability to prevent writes to a database for the duration of a block. (Pull Request)
Add an API for switching connections to support multiple databases. (Pull Request)
Make timestamps with precision the default for migrations. (Pull Request)
Support
:size
option to change text and blob size in MySQL. (Pull Request)Set both the foreign key and the foreign type columns to NULL for polymorphic associations on
dependent: :nullify
strategy. (Pull Request)Allow a permitted instance of
::ActionController::Parameters
to be passed as an argument toActiveRecord::Relation#exists?
. (Pull Request)Add support in
#where
for endless ranges introduced in Ruby 2.6. (Pull Request)Make
ROW_FORMAT=DYNAMIC
a default create table option for MySQL. (Pull Request)Add the ability to disable scopes generated by
ActiveRecord.enum
. (Pull Request)Make implicit ordering configurable for a column. (Pull Request)
Bump the minimum PostgreSQL version to 9.3, dropping support for 9.1 and 9.2. (Pull Request)
Make the values of an enum frozen, raising an error when attempting to modify them. (Pull Request)
Make the SQL of
::ActiveRecord::StatementInvalid
errors its own error property and include SQL binds as a separate error property. (Pull Request)Add an
:if_not_exists
option tocreate_table
. (Pull Request)Add support for multiple databases to
rails db:schema:cache:dump
andrails db:schema:cache:clear
. (Pull Request)Add support for hash and url configs in database hash of
ActiveRecord::Base.connected_to
. (Pull Request)Add support for default expressions and expression indexes for MySQL. (Pull Request)
Add an
index
option forchange_table
migration helpers. (Pull Request)Fix
transaction
reverting for migrations. Previously, commands inside of atransaction
in a reverted migration ran uninverted. This change fixes that. (Pull Request)Allow ActiveRecord::Base.configurations= to be set with a symbolized hash. (Pull Request)
Fix the counter cache to only update if the record is actually saved. (Pull Request)
Add expression indexes support for the SQLite adapter. (Pull Request)
Allow subclasses to redefine autosave callbacks for associated records. (Pull Request)
Bump the minimum MySQL version to 5.5.8. (Pull Request)
Use the utf8mb4 character set by default in MySQL. (Pull Request)
Add the ability to filter out sensitive data in
#inspect
(Pull Request, Pull Request)Change ActiveRecord::Base.configurations to return an object instead of a hash. (Pull Request)
Add database configuration to disable advisory locks. (Pull Request)
Update SQLite3 adapter
alter_table
method to restore foreign keys. (Pull Request)Allow the
:to_table
option ofremove_foreign_key
to be invertible. (Pull Request)Fix default value for MySQL time types with specified precision. (Pull Request)
Fix the
touch
option to behave consistently withPersistence#touch
method. (Pull Request)Raise an exception for duplicate column definitions in Migrations. (Pull Request)
Bump the minimum SQLite version to 3.8. (Pull Request)
Fix parent records to not get saved with duplicate children records. (Pull Request)
Ensure
Associations::CollectionAssociation#size
andAssociations::CollectionAssociation#empty?
use loaded association ids if present. (Pull Request)Add support to preload associations of polymorphic associations when not all the records have the requested associations. (Commit)
Add
touch_all
method to::ActiveRecord::Relation
. (Pull Request)Add
ActiveRecord::Base.base_class?
predicate. (Pull Request)Add custom prefix/suffix options to
ActiveRecord::Store.store_accessor
. (Pull Request)Add
ActiveRecord::Base.create_or_find_by
/!
to deal with the SELECT/INSERT race condition inActiveRecord::Base.find_or_create_by
/!
by leaning on unique constraints in the database. (Pull Request)Add
Relation#pick
as short-hand for single-value plucks. (Pull Request)
Active Storage
Please refer to the Changelog for detailed changes.
Removals
Deprecations
Deprecate
config.active_storage.queue
in favor ofconfig.active_storage.queues.analysis
andconfig.active_storage.queues.purge
. (Pull Request)Deprecate
ActiveStorage::Downloading
in favor ofActiveStorage::Blob#open
. (Commit)Deprecate using
mini_magick
directly for generating image variants in favor ofimage_processing
. (Commit)Deprecate
:combine_options
in Active Storage's ImageProcessing transformer without replacement. (Commit)
Notable changes
Add support for generating BMP image variants. (Pull Request)
Add support for generating TIFF image variants. (Pull Request)
Add support for generating progressive JPEG image variants. (Pull Request)
Add ActiveStorage.routes_prefix for configuring the Active Storage generated routes. (Pull Request)
Generate a 404 Not Found response on
ActiveStorage::DiskController#show
when the requested file is missing from the disk service. (Pull Request)Raise
::ActiveStorage::FileNotFoundError
when the requested file is missing forActiveStorage::Blob#download
andActiveStorage::Blob#open
. (Pull Request)Add a generic
::ActiveStorage::Error
class that Active Storage exceptions inherit from. (Commit)Persist uploaded files assigned to a record to storage when the record is saved instead of immediately. (Pull Request)
Optionally replace existing files instead of adding to them when assigning to a collection of attachments (as in
@user.update!(images: [ … ])
). Useconfig.active_storage.replace_on_assign_to_many
to control this behavior. (Pull Request, Pull Request)Add the ability to reflect on defined attachments using the existing Active Record reflection mechanism. (Pull Request)
Add
ActiveStorage::Blob#open
, which downloads a blob to a tempfile on disk and yields the tempfile. (Commit)Support streaming downloads from Google Cloud Storage. Require version 1.11+ of the
google-cloud-storage
gem. (Pull Request)Use the
image_processing
gem for Active Storage variants. This replaces usingmini_magick
directly. (Pull Request)
Active Model
Please refer to the Changelog for detailed changes.
Removals
Deprecations
Notable changes
Add a configuration option to customize format of the ActiveModel::Errors#full_message. (Pull Request)
Add support for configuring attribute name for
has_secure_password
. (Pull Request)Add
#slice!
method to::ActiveModel::Errors
. (Pull Request)Add ActiveModel::Errors#of_kind? to check presence of a specific error. (Pull Request)
Fix ActiveModel::Serializers::JSON#as_json method for timestamps. (Pull Request)
Fix numericality validator to still use value before type cast except Active Record. (Pull Request)
Fix numericality equality validation of
BigDecimal
andFloat
by casting toBigDecimal
on both ends of the validation. (Pull Request)Fix year value when casting a multiparameter time hash. (Pull Request)
Type cast falsy boolean symbols on boolean attribute as false. (Pull Request)
Return correct date while converting parameters in
value_from_multiparameter_assignment
for::ActiveModel::Type::Date
. (Pull Request)Fall back to parent locale before falling back to the
:errors
namespace while fetching error translations. (Pull Request)
Active Support
Please refer to the Changelog for detailed changes.
Removals
Remove deprecated
#acronym_regex
method fromInflections
. (Commit)Remove deprecated
Module#reachable?
method. (Commit)Remove
Kernel#`
without any replacement. (Pull Request)
Deprecations
Deprecate using negative integer arguments for String#first and String#last. (Pull Request)
Deprecate
ActiveSupport::Multibyte::Unicode#downcase/upcase/swapcase
in favor ofString#downcase/upcase/swapcase
. (Pull Request)Deprecate
ActiveSupport::Multibyte::Unicode#normalize
andActiveSupport::Multibyte::Chars#normalize
in favor ofString#unicode_normalize
. (Pull Request)Deprecate
ActiveSupport::Multibyte::Chars.consumes?
in favor of String#is_utf8?. (Pull Request)Deprecate
ActiveSupport::Multibyte::Unicode#pack_graphemes(array)
andActiveSupport::Multibyte::Unicode#unpack_graphemes(string)
in favor ofarray.flatten.pack("U*")
andstring.scan(/\X/).map(&:codepoints)
, respectively. (Pull Request)
Notable changes
Add support for parallel testing. (Pull Request)
Make sure that String#strip_heredoc preserves frozen-ness of strings. (Pull Request)
Add String#truncate_bytes to truncate a string to a maximum bytesize without breaking multibyte characters or grapheme clusters. (Pull Request)
Add
private
option todelegate
method in order to delegate to private methods. This option acceptstrue/false
as the value. (Pull Request)Add support for translations through
I18n
for ActiveSupport::Inflector#ordinal and ActiveSupport::Inflector#ordinalize. (Pull Request)Add
before?
andafter?
methods toDate
,DateTime
,Time
, andTimeWithZone
. (Pull Request)Fix bug where
URI.unescape
would fail with mixed Unicode/escaped character input. (Pull Request)Fix bug where
::ActiveSupport::Cache
would massively inflate the storage size when compression was enabled. (Pull Request)Redis cache store:
delete_matched
no longer blocks the Redis server. (Pull Request)Fix bug where ActiveSupport::TimeZone.all would fail when tzinfo data for any timezone defined in ActiveSupport::TimeZone::MAPPING was missing. (Pull Request)
Add Enumerable#index_with which allows creating a hash from an enumerable with the value from a passed block or a default argument. (Pull Request)
Allow
Range#===
andRange#cover?
methods to work withRange
argument. (Pull Request)Support key expiry in
increment/decrement
operations of RedisCacheStore. (Pull Request)Add cpu time, idle time, and allocations features to log subscriber events. (Pull Request)
Add support for event object to the Active Support notification system. (Pull Request)
Add support for not caching
nil
entries by introducing new optionskip_nil
forActiveSupport::Cache#fetch
. (Pull Request)Add Array#extract! method which removes and returns the elements for which block returns a true value. (Pull Request)
Keep an HTML-safe string HTML-safe after slicing. (Pull Request)
Add support for tracing constant autoloads via logging. (Commit)
Define
unfreeze_time
as an alias oftravel_back
. (Pull Request)Change ActiveSupport::TaggedLogging.new to return a new logger instance instead of mutating the one received as argument. (Pull Request)
Treat
#delete_prefix
,#delete_suffix
and#unicode_normalize
methods as non HTML-safe methods. (Pull Request)Fix bug where
#without
for::ActiveSupport::HashWithIndifferentAccess
would fail with symbol arguments. (Pull Request)Rename
Module#parent
,Module#parents
, andModule#parent_name
tomodule_parent
,module_parents
, andmodule_parent_name
. (Pull Request)Fix issue where duration was being rounded to a full second when a float was added to the duration. (Pull Request)
Make
#to_options
an alias for#symbolize_keys
in::ActiveSupport::HashWithIndifferentAccess
. (Pull Request)Don't raise an exception anymore if the same block is included multiple times for a Concern. (Pull Request)
Preserve key order passed to
ActiveSupport::CacheStore#fetch_multi
. (Pull Request)Fix String#safe_constantize to not throw a
LoadError
for incorrectly cased constant references. (Pull Request)Add Hash#deep_transform_values and Hash#deep_transform_values!. (Commit)
Add ActiveSupport::HashWithIndifferentAccess#assoc. (Pull Request)
Add
before_reset
callback toCurrentAttributes
and defineafter_reset
as an alias ofresets
for symmetry. (Pull Request)Revise ActiveSupport::Notifications.unsubscribe to correctly handle Regex or other multiple-pattern subscribers. (Pull Request)
Add new autoloading mechanism using Zeitwerk. (Commit)
Add Array#including and Enumerable#including to conveniently enlarge a collection. (Commit)
Rename Array#without and Enumerable#without to Array#excluding and Enumerable#excluding. Old method names are retained as aliases. (Commit)
Add support for supplying
locale
totransliterate
andparameterize
. (Pull Request)Fix Time#advance to work with dates before 1001-03-07. (Pull Request)
Update ActiveSupport::Notifications::Instrumenter#instrument to allow not passing block.  (Pull Request)
Calling test methods with
with_info_handler
method to allow minitest-hooks plugin to work. (Commit)Preserve
html_safe?
status on ActiveSupport::SafeBuffer#*. (Pull Request)
Active Job
Please refer to the Changelog for detailed changes.
Removals
- Remove support for Qu gem. (Pull Request)
Deprecations
Notable changes
Add support for custom serializers for Active Job arguments. (Pull Request)
Add support for executing Active Jobs in the timezone in which they were enqueued. (Pull Request)
Allow passing multiple exceptions to
retry_on
/discard_on
. (Commit)Allow calling
assert_enqueued_with
andassert_enqueued_email_with
without a block. (Pull Request)Wrap the notifications for
enqueue
andenqueue_at
in thearound_enqueue
callback instead ofafter_enqueue
callback. (Pull Request)Allow calling
perform_enqueued_jobs
without a block. (Pull Request)Allow calling
assert_performed_with
without a block. (Pull Request)Add
:queue
option to job assertions and helpers. (Pull Request)Add hooks to Active Job around retries and discards. (Pull Request)
Add a way to test for subset of arguments when performing jobs. (Pull Request)
Include deserialized arguments in jobs returned by Active Job test helpers. (Pull Request)
Allow Active Job assertion helpers to accept Proc for
only
keyword. (Pull Request)Drop microseconds and nanoseconds from the job arguments in assertion helpers. (Pull Request)
Ruby on Rails
Guides
Please refer to the Changelog for detailed changes.
Notable changes
Add Multiple Databases with Active Record guide. (Pull Request)
Add a section about troubleshooting of autoloading constants. (Commit)
Add Action Mailbox Basics guide. (Pull Request)
Add Action Text Overview guide. (Pull Request)
Credits
See the
full list of contributors to Rails
for the many people who spent many hours making Rails
, the stable and robust
framework it is. Kudos to all of them.


This sample app uses a System Properties microservice to return the properties of the system that you're running.


NES, SNES, GameBoy, and Nintendo 64 Pictures
PlayStation Picture
PSNES Picture
http://en.wikipedia.org/wiki/History_of_Nintendo
http://playstationmuseum.com/history/
Zelda Screenshot
Legend of Zelda Cover
Pokemon Screenshot
Pokemon Red Cover
Mario Screenshot
Mario Cover
Spyro Screenshot
Spyro Cover
Crash Bandicoot Screenshot
Crash Bandicoot Cover
Tomb Raider Screenshot
Tomb Raider Cover
Crash Bandicoot
Legend of Zelda
Super Mario Bros.
Pokemon
Spyro the Dragon
Tomb Raider


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@counter-style blacknwhite { system: cyclic; symbols: ◆ ◇; suffix: " "; } ul { list-style: blacknwhite; }
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