Examples include Closure Compiler, CoffeeScript, Dart, Haxe, TypeScript and Emscripten.

But I can describe a simple reproduction case to demonstrate the developer inconvenience (can provide a sample app if it's helpful).

An example app is an application that is designed to reproduce a bug or demonstrate an issue.

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?

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

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.

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

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.

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.

Hey, that’s is an imaginary complication of our example - please don’t do this with every condition you have in your app.

For branching out a separate path in an activity, use the Path() macro. It’s a convenient, simple way to declare alternative routes

step :decide_type, Output(Activity::Left, :credit_card) => Track(:with_credit_card)

# Create the track, which would automatically create an implicit End with the same id.
Track(:with_credit_card) do
    step :authorize
    step :charge
end

class Example::ValidationErrorTrack < Trailblazer::Activity::Railway
  step :validate_model, Output(:failure) => Track(:validation_error)
  step :save,           Output(:failure) => Track(:validation_error)

  # Can't use fail here or the magnetic_to won't work and  Track(:validation_error) won't work
  step :log_validation_error, magnetic_to: :validation_error,
    Output(:success) => End(:validation_error), 
    Output(:failure) => End(:validation_error) 
end

puts Trailblazer::Developer.render o
Reloading...

#<Start/:default>
 {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
#<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
 {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
 {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
#<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
 {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
 {Trailblazer::Activity::Right} => #<End/:success>
#<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
 {Trailblazer::Activity::Left} => #<End/:validation_error>
 {Trailblazer::Activity::Right} => #<End/:validation_error>
#<End/:success>

#<End/:validation_error>

#<End/:failure>

class Example::ValidationErrorTrack::VPathHelper1 < Trailblazer::Activity::Railway
   validation_error_path = Path(end_id: "End.validation_error", end_task: End(:validation_error)) do
    step :log_validation_error
  end
  step :validate_model, Output(:failure) => validation_error_path
  step :save,           Output(:failure) => validation_error_path
end

o=Example::ValidationErrorTrack::VPathHelper1; puts Trailblazer::Developer.render o
Reloading...

#<Start/:default>
 {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
#<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
 {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
 {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
#<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
 {Trailblazer::Activity::Right} => #<End/:validation_error>
#<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
 {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
 {Trailblazer::Activity::Right} => #<End/:success>
#<End/:success>

#<End/:validation_error>

#<End/:failure>

step :direct_debit

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)

This connects the failure output to the previous task, which might create an infinity loop and waste your computing time - it is solely here for demonstrational purposes.

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)

Yes, we could and should use Reform or Dry-validation here.

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.

So, what can we do to check for None in our programs? You can use builtin Optional type and write a lot of if some is not None: conditions. But, having null checks here and there makes your code unreadable.

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?

This is how the same example would look like using raw monads:

The legendary cfp-app will become a Rails-to-TRB refactoring tutorial.

Example (in bash, but my question shouldn't be considered bash-specific):

time run_with_timeout 3 sleep_and_exit 1 7; echo $?

timeout_child () { trap -- "" SIGTERM; child=$!; timeout=$1; ( sleep $timeout; kill $child; ) & wait $child; } And the usage: ( while true; do echo -n .; sleep 0.1; done) & timeout_child 2

{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}

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

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

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

array :translations do hash do string :locale string :name end end array inputs can only have one input nested underneath them. This is because every element of the array must be the same type. And the inputs nested inside arrays cannot have names because they would never be used.

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

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

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.

Depending on the politics it might either mean that the implementation can no longer be changed, because that would break your code, or that your code is very fragile and keeps breaking on every upgrade or change of the underlying implementation.

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.

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

You can find a list of applications using this gem in this repository: https://github.com/m-Peter/nested-form-examples . All the examples are implemented in before/after pairs. The before is using the accepts_nested_attributes_for, while the after uses this gem to achieve the same functionality.

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

Don't go around saying{-- to people that--} the world owes you a living. The world owes you nothing. It was here first. {~~One~>Only one~~} thing is impossible for God: To find {++any++} sense in any copyright law on the planet. {==Truth is stranger than fiction==}{>>strange but true<<}, but it is because Fiction is obliged to stick to possibilities; Truth isn’t.

Are designers also wasting the time of the critics?

The syntax itself provides a visualization of the structure of the grid.

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.

div:nth-of-type(3n+1) { grid-column: 1; } div:nth-of-type(3n+2) { grid-column: 2; } div:nth-of-type(3n+3) { grid-column: 3; } div:nth-of-type(-n+3) { grid-row: 1; }

#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; }

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:

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

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

I want to make some add-ons or wrappers on components e.g BigButton.svelte <script> import Button from './Button.svelte' </script> <Button fz="16" h="64" {...$$props}> <slot slot="prepend" name="prepend" /> <slot /> <slot slot="append" name="append" /> </Button>

Also as an aside, your REPL is far, far too complicated. You've got a much better chance of us being able to see your issue and fix it if you boil it down to just the minimum required code in order to reproduce the issue.

beforeUpdate(async () => { console.log('the component is about to update'); await tick(); console.log('the component just updated'); });

You may want the tippy to appear at a different location from its trigger (event listeners) target. For example:

Context menu

{#each charts as chart, i} <div class="wrapper"> <div class="icon" on:click={e => instances[i].handle(e)}>Click</div> <div class="content"> <svelte:component this={charts[i]} bind:this={instances[i]} /> </div> </div> {/each} ...where each child component exports a handle method: <script> let event; export function handle(e){ event = e; }; </script>

What is a data-originated component? It’s a kind of component that is primarily designed and built for either: displaying, entering, or customizing a given data content itself, rather than focusing on the form it takes. For example Drawer is a non data-originated component, although it may include some. Whereas Table, or Form, or even Feed are good examples of data-originated components.

const store = observable({ players: [ "Player 1", "Player 2", ], // ... }) reaction(() => JSON.stringify(store), json => { localStorage.setItem('store',json); }, { delay: 500, }); let json = localStorage.getItem('store'); if(json) { Object.assign(store, JSON.parse(json)); }

But, it’s not how we usually work with Svelte and write reusable components such asUnorderedListor similar. Because your example is really synthetic and unuseful in the real world.

highlighting

The use of __proto__ is controversial and discouraged. It was never originally included in the ECMAScript language spec, but modern browsers implemented it anyway. Only recently was the __proto__ property standardized by the ECMAScript 2015 specification for compatibility with web browsers, so it will be supported into the future.

If you were to check the return status of every single command, your script would look like this:

true && { echo true; false; } || { echo false; true; }

true && ((i++)) || ((i--))

docker build --cache-from=base_image:2.2.1,custom-gource:0.1 . -t custom-gource:0.2

this is the problem with that method.

I came up with this solution by piecing together man pages and random google result. I was surprised at how many incomplete and inaccurate answers were out there. What may have been more surprising was the complete lack of a full intact solution.

A spreadsheet may be represented as a directed acyclic graph, with each cell a vertex and an edge connected a cell when a formula references another cell. Other applications include scheduling, circuit design and Bayesian networks.

rms of Global Systems, but we do need an earth- wide network of connections, including the ability partially to translate knowledges among very different-and power-differenti- ated - communities. We need the power of modern critical theories of how meanings and bodies get made, not in order to deny meanings and bodies, but in order to build meanings and bodies that have a chance for life.

any ca

e the law of the fath

Here is a simplified example of a malicious .gitlab-ci.yml

const countriesRegExp = countries.reduce( (regex, country, i) => (i === 0 ? `(${country})` : `${regex}|(${country})`), "" )

neoliberalism, can be seen not only as destructive of trad-itional versions of Professionalism, but as Foucault argued, is also product-ive of new practices shaped by the market.

‘old professionalism’included therelative autonomy of the profession to control the‘field of judgement’(Ball, 2003, p. 216) and determine its own professional remit (seeTett, 2010;Ledwith, 2011). In contrast, the main features of this new version of profes-sionalism are centred on the ways in which the profession has been trans-formed into an instrument of economic policy and, in particular, thechanges in competencies which have accompanied this development.

‘organisational’professional-ism (seeEvetts, 2009) - that is—a profession whose remit is controlled byemployers—in this instance the local state.Evetts (2009)argues that‘organisational professionalism’has displaced an older model of profes-sionalism -‘occupational’professionalism, whereby professions were sub-ject to internal regulation and control by ethical standards that wereoccupationally defined

managers and practitioners regularly discuss their‘work’in terms of‘measuring outcomes’,‘improving outputs’,‘promotingbest practice’,‘promoting sector leading practices’,‘benchmarking’,‘qual-ity assurance’,‘better outputs’,‘continual improvement’and being‘BOLD’(better outcomes leaner delivery).

performance targets’of practitioners, for example, I noted that many targets are related to themanagement of austerity in one way or another. Typical‘performance tar-gets’include such objectives as‘increase the number of DevelopmentTrusts and Social Enterprises providing services’,‘increase the number ofasset transfers’;‘increase the number of volunteers engaged in servicedesign and delivery’

Foucault’s proposition that neoliberalism‘penetrates more deeply intopeople’s psyches’

neoliberalism is productive of a new form of profes-sionalism is theoretically indebted to Foucaul

Examples of this include: requiring base classes or reading from imported variables that have not been initialized yet.

we will work with an artificial application that pretty prints object trees into a YAML like format

These are fine and do not cause any issues.

Omitted details change everything here. There won't be circular dependency because unused import is skipped. Consider providing stackoverflow.com/help/mcve .

Informative data about objects that are considered prototypes for the role. Base concept is similar to type, but without inheritance of limitations and properties. Base concepts are designed as a substitute for inheritance for external concepts. A base concept is like a related concept except that the base concept is almost identical to the role definition.

Returns a Promise<?Object> that resolves with no value on success or resolves with an Object of submission errors on failure. The reason it resolves with errors is to leave rejection for when there is a server or communications error.

Listening for External Changes By wrapping a stateful ExternalModificationDetector component in a Field component, we can listen for changes to a field's value, and by knowing whether or not the field is active, deduce when a field's value changes due to external influences.

Not all application state belongs inside your application's component hierarchy. Sometimes, you'll have values that need to be accessed by multiple unrelated components, or by a regular JavaScript module.

const { getByRole } = render(<input bind_value={text}>)

const { getByRole } = render(html`<input bind:value=${text} />`)

render(html`<${Button} on:click=${() => (clicked += 1)}>Click Me!<//>`)

Right, and if most uses of an FTP service use new FtpService() the one that sets an alternate port will stand out (service.SetPort(12345))

by using tagged templates we can inline function calls

Encoding examples: