OpenFaaS® makes it easy for developers to deploy event-driven functions and microservices to Kubernetes without repetitive, boiler-plate coding.

we used `backticks` to jump into native Javascript to use moment.js

Hyperstack gives you full access to the entire universe of JavaScript libraries and components directly within your Ruby code.Everything you can do in JavaScript is simple to do in Ruby; this includes passing parameters between Ruby and JavaScript and even passing Ruby methods as JavaScript callbacks.There is no need to learn JavaScript, all you need to understand is how to bridge between JS and Ruby.

Before a bug can be fixed, it has to be understood and reproduced. For every issue, a maintainer gets, they have to decipher what was supposed to happen and then spend minutes or hours piecing together their reproduction. Usually, they can’t get it right, so they have to ask for clarification. This back-and-forth process takes lots of energy and wastes everyone’s time. Instead, it’s better to provide an example app from the beginning. At the end of the day, would you rather maintainers spend their time making example apps or fixing issues?

I'd say an equation is anything with an equals sign in it; a formula is an equation of the form A= stuffA= stuffA={\rm\ stuff} where AAA does not appear among the stuff on the right side.

An equation is meant to be solved, that is, there are some unknowns. A formula is meant to be evaluated, that is, you replace all variables in it with values and get the value of the formula.

The key idea is that the equation captures not just the ingredients of the formula, but also the relationship between the different ingredients.

In your case, "mpg = distance/gallons" is best understood as "a formula in the form of an equation", which means that in this instance the two words are interchangeable.

The :empty selector refers only to child nodes, not input values. [value=""] does work; but only for the initial state. This is because a node's value attribute (that CSS sees), is not the same as the node's value property (Changed by the user or DOM javascript, and submitted as form data).

The selector [value=""] tests whether the element has the value attribute in markup and has the empty string as its value.

Semantically correct usage of elements means that you use them for what they are meant to be used for.

It means that you're calling something what it actually is.

Another example: a list (<ul> or <ol>) should generally be used to group similar items (<li>). You could use a div for the group and a <span> for each item, and style each span to be on a separate line with a bullet point, and it might look the way you want. But "this is a list" conveys more information.

The classic example is that if something is a table, it should contain rows and columns of data. To use that for layout is semantically incorrect - you're saying "this is a table" when it's not.

Knowing what your elements are lets browsers use sensible defaults for how they should look and behave. This means you have less customization work to do and are more likely to get consistent results in different browsers.

Website: <input type="url" name="website" required pattern="https?://.+"> Now our input box will only accept text starting with http:// or https:// and at least one additional character

With these JavaScript techniques, the display of server validation errors could be a lot simpler if you expect most of your users to have JS enabled. For example, Rails still encourages you to dump all validation errors at the top of a form, which is lulzy in this age of touchy UX. But you could do that minimal thing with server errors, then rely on HTML5 validation to provide a good user experience for the vast majority of your users.

Design SHOGI pieces have been redesigned with new iconography to indicate the piece’s movement.

Shogi is a classic game. I know many people who want to play Shogi, but the Kanji on the pieces makes it too hard to master. I have designed this Shogi with icons so anybody can learn it easily.

Why don’t we put the “create user” task onto the failure track, and in case of successfully persisting the new user, we deviate back to the happy path?

To implement such an activity, we only need to rewire the second step’s failure output to a new terminus.

Since you can reference outputs by their semantic, you as a modeller only connect conceptual termini to ongoing connections!

it’s a bit as if the following wiring is applied to every task added via #step

Visualized, our new composed structure would look as follows.

Suppose that the validate task was getting quite complex and bloated. When writing “normal” Ruby, you’d break up one method into several. In Trailblazer, that’s when you introduce a new, smaller activity.

Our new feature, Total Cookie Protection, works by maintaining a separate “cookie jar” for each website you visit. Any time a website, or third-party content embedded in a website, deposits a cookie in your browser, that cookie is confined to the cookie jar assigned to that website, such that it is not allowed to be shared with any other website.

The absence of a method name here is per design: this object does only one thing, and hence what it does is reflected in the class name.

To whom did you sell your keys and at what kind of rates? https://steamcommunity.com/id/playa131 for example resells them and might be the source for DIG's purchases.

Do you have collaborators who could have generated keys and sold them on their own? DIG's Steam keys and other stores' Steam keys must have some source, after all. Keys don't generate themselves, and only your accounts should be able to request them.This particular game was in Bunch Keys Indie Wizardry Bundle. I assume you had a proper contract for that. Maybe DIG or an intermediary bought 50-200 copies of it?

It isn't stealing because you or an associate must have generated and given them the keys in some way or another?Ideally you would ask a DIG bundle buyer to show you their key for your game, so you can figure out what key request batch it came from, and then you can scratch your head and wonder who you gave those keys to and what journey they took afterwards.

URI::MailTo::EMAIL_REGEXP

step :policy, before: :create_model

the validate task gets removed, assuming the Admin won’t need a validation

step Subprocess(Memo::Validate), Output(:invalid_params) => Track(:failure)

While you could nest an activity into another manually, the Subprocess macro will come in handy.

The Track() function will snap the output to the next task that is “magnetic to” the track’s semantic.

step :charge_creditcard, Output(:failure) => End(:declined)

step :charge_creditcard, Output(:failure) => End(:success) end This reconnects both outputs to the same end, always ending in a - desirable, yet unrealistic - successful state.

step :find_provider, Output(UsePaypal, :paypal) => Track(:paypal)

Version HEAD now

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Regardless of origin, allow/deny are simply clearer terms that does not require tracing the history of black/white as representations of that meaning. We can simply use the meaning directly.

Allowlist, not whitelist. Blocklist, not blacklist. Goodbye, wtf. Microsoft scans Chromium code, lops off offensive words

While you could program this little piece of logic and flow yourself using a bunch of Ruby methods along with a considerable amount of ifs and elses, and maybe elsif, if you’re feeling fancy, a Trailblazer activity provides you a simple API for creating such flow without having to write and maintain any control code. It is an abstraction.

Let’s start with the same number dividing example, which returns 0 when the error happens. Maybe instead we can indicate that the result was not successful without any explicit numerical value?

despite initially appearing to be an appropriate and effective response to a problem, has more bad consequences than good ones

Soldaat in Indonesië  

It seems like such a beautiful little visual novel and while I wasn’t expecting a masterpiece of localisation based on its low price, I was expecting to be able to read it. But that just cannot be done. Developers from Japan, China, Taiwan, Indonesia, and every other emerging game development centre through Asia-Pacific, listen to me carefully: You can have the most beautiful aesthetics and a heartwarming concept for your game. If the localisation isn’t going to be good, though, do not bother with an English release, because it is going to get reviews like this one. Make “invest in proper translation” your big resolution for 2021. I do not want to play any other games like Lily in the Hollow - Resurrection ever again.

In other words, once you've used Maybe you cannot hit nil with a missing method. This is remarkable because even &. doesn't save you from omitting || "No state" at the end of the computation. Basically, that's what they call "Type Safety".

The .chain() method allows us to switch over to the left track if an error occurs. Note that the switches only go one way.

This text wound up founding the discipline which we today call "metaphysics", and one way to describe what this subject encompasses is that it covers things at a level of abstraction above physics.

I work with crazy geniuses who share many of my opinions (not all, and that’s good).

What this means is: I better refrain from writing a new book and we rather focus on more and better docs.

In the telecommunications industry, on a conceptual level, value-added services add value to the standard service offering, spurring subscribers to use their phone more and allowing the operator to drive up their average revenue per user.

note that TRB source code modifications are not proprietary

Why then sending the SIGINT manually to the shell doesn't kill the child, e.g. 'kill -2 <shell-pid>' doesn't do anything to a child process while Ctrl-C kills it?

The idea of the script is this: most of the important logic runs in a subshell which is piped through tee and to a logfile, so I don't have to tee every single line of the main logic to get it all logged.

There are times where it is useful to know whether a value was passed to run or the result of a filter default. In particular, it is useful when nil is an acceptable value.

main > h = {key_with_nil_value: nil}
=> {:key_with_nil_value=>nil}

main > h[:key_with_nil_value]
=> nil

main > h[:missing_key]  # this would be undefined in JavaScript (a useful distinction) rather than null, but in Ruby it's indistinguishable from the case where a nil value was actually explicitly _supplied_ by the caller/user
=> nil

# so we have to check for "missingness" ("undefinedness"?) differently in Ruby

main > h.key?(:key_with_nil_value)
=> true

main > h.key?(:missing_key)
=> false

def edit account = find_account! @account = UpdateAccount.new( account: account, first_name: account.first_name, last_name: account.last_name) end

Record filters allow you to require an instance of a particular class (or one of its subclasses) or a value that can be used to locate an instance of the object. If the value does not match, it will call find on the class of the record. This is particularly useful when working with ActiveRecord objects.

> RecordInteraction.run!(encoding: 'ascii') => #<Encoding:US-ASCII>

main > Encoding.find('ascii')
=> #<Encoding:US-ASCII>

If ActiveModel deals with your nouns, then ActiveInteraction handles your verbs.

ActiveInteraction also supports merging errors. This is useful if you want to delegate validation to some other object. For example, if you have an interaction that updates a record, you might want that record to validate itself. By using the #merge! helper on errors, you can do exactly that.

Inside the interaction, we could use #find instead of #find_by_id. That way we wouldn't need the #find_account! helper method in the controller because the error would bubble all the way up. However, you should try to avoid raising errors from interactions. If you do, you'll have to deal with raised exceptions as well as the validity of the outcome.

For this one we'll define a helper method to handle raising the correct errors. We have to do this because calling .run! would raise an ActiveInteraction::InvalidInteractionError instead of an ActiveRecord::RecordNotFound. That means Rails would render a 500 instead of a 404.

{a: 1, b: 2, c: 3, d: 4} => {a:, b:, **rest} # a == 1, b == 2, rest == {:c=>3, :d=>4}

{a, b, ...rest} = {a: 1, b: 2, c: 3, d: 4}

What we do collect:The translated words you encounter so that we know what words you are exposed to and can serve up appropriate vocabulary quizzes.Any vocabulary quizzes you see and the results of those quizzes so that we can keep track of how well you know each vocabulary concept.Anonymized (not linked to anyone's particular account) web page URLs, whether translations show up on them, and whether any bugs or errors occur on those pages so that we can better detect any broad issues affecting our user base.

def initialize(attributes=nil) self.assign_attributes(attributes) end

Uses

The central ideas of this design pattern closely mirror the semantics of first-class functions and higher-order functions in functional programming languages. Specifically, the invoker object is a higher-order function of which the command object is a first-class argument.

describe '.validate(context, filters, inputs)' do let(:inputs) { {} } let(:filter) { ActiveInteraction::Filter.new(:name, {}) } let(:interaction) do

Does that make it so? Not for me. Were it simply a matter of words, I wouldn't write another word on the matter. But there are two distinct concepts behind these terms, concepts engendered separately and best understood separately.

In a rule-based system, a metarule is a rule governing the application of other rules.

The modern sense of "an X about X" has given rise to concepts like "meta-cognition" (cognition about cognition), "meta-emotion" (emotion about emotion), "meta-discussion" (discussion about discussion), "meta-joke" (joke about jokes), and "metaprogramming" (writing programs that manipulate programs).

If you think you’ve conveyed something but the other person hears something completely different, is that their fault or yours? 

People often hear what they think should be said, not the words that are actually spoken. This comes from the tendency of people to think faster than they talk. A listener makes assumptions about what they expect because their minds race ahead. This can be especially problematic when you misinterpret what your boss said. 

The more important point comes from a program design perspective. Here, "programming to an interface" means focusing your design on what the code is doing, not how it does it. This is a vital distinction that pushes your design towards correctness and flexibility.

My understanding of "programming to an interface" is different than what the question or the other answers suggest. Which is not to say that my understanding is correct, or that the things in the other answers aren't good ideas, just that they're not what I think of when I hear that term.

If the program was important enough, Microsoft might actually go ahead and add some hack to their implementation so the the program would continue to work, but the cost of that is increased complexity (with all the ensuing problems) of the Windows code. It also makes life extra-hard for the Wine people, because they try to implement the WinAPI as well, but they can only refer to the documentation for how to do this, which leads to many programs not working as they should because they (accidentally or intentionally) rely on some implementation detail.

Say you have software to keep track of your grocery list. In the 80's, this software would work against a command line and some flat files on floppy disk. Then you got a UI. Then you maybe put the list in the database. Later on it maybe moved to the cloud or mobile phones or facebook integration. If you designed your code specifically around the implementation (floppy disks and command lines) you would be ill-prepared for changes. If you designed your code around the interface (manipulating a grocery list) then the implementation is free to change.

It's more like providing an Employee object rather than the set of linked tables you use to store an Employee record. Or providing an interface to iterate through songs, and not caring if those songs are shuffled, or on a CD, or streaming from the internet. They're just a sequence of songs.

The word home, for instance, has a denotation of “the place (such as a house or apartment) where a person lives,” but it may additionally have many connotations (such as “warmth,” “security,” or “childhood”) for some people.

Encapsulation is used to hide the values or state of a structured data object inside a class, preventing direct access to them by clients in a way that could expose hidden implementation details or violate state invariance maintained by the methods.

As I reported in #10, error keys get duplicated and we should namespace them. This code behaves right like AR::Base accept_nested_attributes

class ConferencesController def create conference = Conference.new @conference_form = ConferenceForm.new(conference) @conference_form.submit(conference_params) if @conference_form.save redirect_to @conference_form, notice: "Conference: #{@conference_form.name} was successfully created." } else render :new end end end

It makes me happy to see people actually think about things and not just accept a shitty API.

For now I feel ActiveForm is still a bit early to transition to a gem  as there are still things to improve and work out. One day I'll invest more time into making it extendable and release it as a gem. For now I feel it's an unnecessary complexity.

we get the benefit of isolating request specific logic without cramming it into a ActiveRecord model that will be used in multiple controllers/actions

I typically save everything I can first, and then call the side-effects afterwards. If the side-effects fail I can handle them elsewhere and retry when necessary.

I've been over the use case for form objects in this post on moving away from fat models but wanted to go into more detail on how and why I use them here. I really believe in the utility of these objects; their ability to abstract and isolate logic in a simple and effective manner is unmatched, IMO.

DSLs can be problematic for the user since the user has to manage state (e.g. am I supposed to call valid? first or update_attributes?). This is exactly why the #validate is the only method to change state in Reform.

Top level architecture

class UsersController < ApplicationController def create success = -> (response, time) { redirect_to root_path, notice: "#{response} - at: #{time}" } failure = -> { render :new } Workflow::CreateUser.call(params[:name], success: success, failure: failure) end end

Have you ever been emailed something from a company and tried to reply only to be frustrated with a failed-to-send message response? A no-reply email frustrates your customers.Instead, use a dedicated email to send out your messages and to keep business emails in a central location so you can answer customer concerns quickly and decisively. This level of customer service will help develop your reputation as a company that cares about its customers.

An intent filter is an expression in an app's manifest file that specifies the type of intents that the component would like to receive. For instance, by declaring an intent filter for an activity, you make it possible for other apps to directly start your activity with a certain kind of intent. Likewise, if you do not declare any intent filters for an activity, then it can be started only with an explicit intent.

Great pricing plan names that illustrate the type of plan you’re about to choose – from simple “hammering” for quick storage to the full blown “crane” offering unlimited storage.

100vw is 100% of the viewport width not accounting for scrollbars (unless the root element has anything other than overflow: auto set, but auto is the default value). Thus, when the page content overflows the viewport vertically, the browser renders the vertical scroll bar, which reduces the visible viewport area by a few pixels. But the 100vw value doesn't update to account for this, so the selected div retains the same width as before the vertical scrollbar appeared. This results in the horizontal scroll bar rendering.

Unlike naming children, coding involves naming things on a daily basis. When you write code, naming things isn’t just hard, it’s a relentless demand for creativity. Fortunately, programmers are creative people.

If we renamed things more often, then it probably wouldn’t be so hard to name them in the first place.

This is funny because it’s unexpected. Cache invalidation sounds like a hard thing, while naming sounds more straightforward. The joke works because it violates our expectation that hard things should be technical. It’s also funny because it’s true.

Scalability is the problem you want to have, and sooner rather than later, but maintainability is the problem you’re definitely going to have, sooner or later.

Naming matters for both idealogical and practical reasons.

Space: Suppose we had infinite memory, then cache all the data; but we don't so we have to decide what to cache that is meaningful to have the cache implemented (is a ??K cache size enough for your use case? Should you add more?) - It's the balance with the resources available.

Time: Suppose all your data was immutable, then cache all the data indefinitely. But this isn't always to case so you have to figure out what works for the given scenario (A person's mailing address doesn't change often, but their GPS position does).

So the hard and unsolvable problem becomes: how up-to-date do you really need to be?

After considering the value we place, and the tradeoffs we make, when it comes to knowing anything of significance, I think it becomes much easier to understand why cache invalidation is one of the hard problems in computer science

the 2 hardest problems in computer science are essentially the 2 hardest problems of life in general, as far as humans and information are concerned.

The non-determinism is why cache invalidation — and that other hard problem, naming things — are uniquely and intractably hard problems in computer science. Computers can perfectly solve deterministic problems. But they can’t predict when to invalidate a cache because, ultimately, we, the humans who design and build computational processes, can’t agree on when a cache needs to be invalidated.

you began by first finding out if your crush was already in a relationship. If so, you then did what you could in your power to have the most most up-to-date information on their relationship status. The downside of outdated data is self-evident: you want to move in at the first sign of the current relationship dissolving.

Now let me ask you, do you write JS for a single page application differently from a "traditional" web application? I sure hope you do! In a "traditional" application, you can get away with being sloppy because every time the user navigates to a new page, their browser destroys the DOM and the JavaScript context. SPAs, though, require a more thoughtful approach.

Not to mention 80% of our sales are laptops and desktops running, you guessed it, a Linux desktop. So, unlike Red Hat and Canonical, we live or die based on how good that experience is.

the most productive environment possible for people that use their computer to create.What is a productive environment?How do you measure productivity in an operating system environment?How do you compare YOUR distribution to other distributions when it comes to productivity?Is the way in which 'people that use their computer to create' (creators) the same across all professions and activities?Does a photographer have the same requirements for a productive environment as a software engineer?Why do you think your distribution will be the best for delivering a productive environment than any other Linux distribution?

Think about how much you want to customize the desktop environment(DE), and whether you know how to do so. Pick a distro that has the DE you like.

When people talk about "beginner distros" they mean distros that are no hassle to get started, it doesnt mean they are somewhat inferior or less capable.

Jan 2021. I use a small, dedicated enterprise grade SSD as a swap drive. These enterprise drives can be bought for as little as $80 for 240GB right now, and are 3D nand with load leveling and other valuable improvements for swap. By using the drive only for swap, you pretty much guarantee it won’t affect your expensive terabyte level data drive should it fail, and you still get the performance of SSD. Estimates for very heavy use are about 2 1/2 years.

justify-content Sometimes the total size of your grid might be less than the size of its grid container. This could happen if all of your grid items are sized with non-flexible units like px. In this case you can set the alignment of the grid within the grid container.

The first problem is that if you ever remove an item, there will be a big black block in the layout. Maybe that’s OK, but more likely it isn’t. The second problem is that grid containers do not, by default, shrink-wrap their items. Instead, they fill out the parent element, as block boxes do. Both of these problems are illustrated in Figure 6.

#ttt > * { border: 1px solid black; border-width: 0 1px 1px 0; display: flex; /* flex styling to center content in divs */ align-items: center; justify-content: center; } #ttt > *:nth-of-type(3n) { border-right-width: 0; } #ttt > *:nth-of-type(n+7) { border-bottom-width: 0; }

Your grid areas can only be rectangles (like the left), not arbitrary polygons (like the right).

.box1 { grid-column-start: 1; grid-column-end: 4; grid-row-start: 1; grid-row-end: 3; } .box2 { grid-column-start: 1; grid-row-start: 2; grid-row-end: 4; }

If you're creating an actual, informational web page, stick to frameless HTML, CSS and unobstrusive JavaScripts and keep in mind that the page should still be usable with scripting disabled.

Then recently I was shopping at the John Lewis website, and they brought up the Verified By Visa page in an iframe - wonderful! I'm still looking at the John Lewis site, and all that's happening is I'm being asked for my Verified By Visa password - no problem. Although as a web developer I know that there's no technical difference between that and a plain old redirect-there-redirect-back, the user experience is so much better!

I’m harvesting credit card numbers and passwords from your site. Here’s how.

Science’s culture of critique discourages groupthink, countermands the effects of human biases, and protects knowledge, not only by rewarding a dispassionate stance toward the subject and institutionalizing organized skepticism but also by fostering competition among scientists able to replicate and hence challenge each other’s work.

We can certainly explain the issues snap cause without using political or religious arguments. We did so in the documentation I linked to above.

For the future, you should: Install LTS (Long-term support) versions as they have an 8-year life span (with Extended Security Maintenance) or 5 years without. The current LTS version is Ubuntu 18.04.1 LTS Bionic Beaver released on July 26, 2018 with an EOL in April 2023. OR Carefully watch the EOL of the interim / development releases and upgrade frequently.

config.action_mailer.register_preview_interceptor :css_inline_styler

Previewing You can create a controller that gets the email and then renders the body from it.

The following Sankey flow diagram shows the current glyph sets included:

The background-origin CSS property sets the background's origin: from the border start, inside the border, or inside the padding.

Try out the different border-image-repeat values in this demo

Content is like water

cellular data recorders offer the capacity to measure biologically relevant signals15,16,17,18,19 in places that are otherwise difficult to access, such as inside the body20,21, and over time22

Maybe $$slots like $$props? My use case is that I'd like to wrap a slot's content in an element that applies styling that I'd like absent without the slotted content. Something like this: {#if $$slots.description} <div class="description"> <slot name="description"></slot> </div> {/if}

It isn’t always guaranteed to be a single root element, in that case it could return an array of elements?