I think the fact that it's so simple to add, makes the case to just keep it in userland.

You can require plugins for Filewatcher, which extends core functionality.

extensible plugin system.

Practically speaking, if you can't think of a reason why it would be dangerous then theres more to be gained by opting for extensibility.

Marking methods protected by default is a mitigation for one of the major issues in modern SW development: failure of imagination.

If it's dangerous, note it in the class/method Javadocs, don't just blindly slam the door shut.

When a developer chooses to extend a class and override a method, they are consciously saying "I know what I'm doing." and for the sake of productivity that should be enough. period.

Been disappointed, surprised or hurt by a library etc. that was overly permissive in it's extensibility? I have not.

grammar Parser { rule TOP { I <love> <lang> } token love { '♥' | love } token lang { < Raku Perl Rust Go Python Ruby > } } say Parser.parse: 'I ♥ Raku'; # OUTPUT: ｢I ♥ Raku｣ love => ｢♥｣ lang => ｢Raku｣ say Parser.parse: 'I love Perl'; # OUTPUT: ｢I love Perl｣ love => ｢love｣ lang => ｢Perl｣

Definable grammars for pattern matching and generalized string processing

Yes, using custom tags. Example in Python, making the !join tag join strings in an array:

(you can get pretty far with <svelte:component> and passing component constructors around and spicing up props along the way)

I have a rule that I won't allow Capybara to be monkey-patched in Poltergeist. This gives some indication to users about whether something is non-standard. So basically all non-standard stuff must be on page.driver rather than page (or a node).

The protocol is intended to be extensible; future versions will likely introduce additional concepts such as multiplexing.

add_class Set do |value, options| Set.new self.Array(value, options || {}) end use :NUMBER_SET, class: Set, of: Integer

it focuses on compiling non-standard language extensions: JSX, TypeScript, and Flow. Because of this smaller scope, Sucrase can get away with an architecture that is much more performant but less extensible

Ok, I have seen that there are lot of built-in and third party validations, but sooner or later I will face a validation rule not covered by this buffet. Can I build a custom one? Of course you can!

It is easily extensible (already implemented Final Form and Formik plugin extensions).

I'm okay with an overall design that allows people to plugin the parts they need in order to be able to generically support a compile-to-javascript language, but to bake in support for one singular solution because its popular is simply bad engineering.

"Software entities ... should be open for extension, but closed for modification."

such an entity can allow its behaviour to be extended without modifying its source code.

In these two languages, the "Function is a first-class citizen, which allows for aggregation of behaviors outside of the class.

open/closed principles

Allows registration of TypeScript custom transformers at any of the supported stages:

Svelte will not offer a generic way to support style customizing via contextual class overrides (as we'd do it in plain HTML). Instead we'll invent something new that is entirely different. If a child component is provided and does not anticipate some contextual usage scenario (style wise) you'd need to copy it or hack around that via :global hacks.

The point of the feature is to not rely on the third-party author of the child component to add a prop for every action under the sun. Rather, they could just mark a recipient for actions on the component (assuming there is a viable target element), and then consumers of the library could extend the component using whatever actions they desire.

Does it look like a decorator plugin in Ractive, right

Your LazyLoad image is now inextensible. What if you want to add a class? Perhaps the author of LazyLoad thought of that and sets className onto the <img>. But will the author consider everything? Perhaps if we get {...state} attributes.

For several reasons the Simple backend shipped with Active Support only does the "simplest thing that could possibly work" for Ruby on Rails3 ... which means that it is only guaranteed to work for English and, as a side effect, languages that are very similar to English. Also, the simple backend is only capable of reading translations but cannot dynamically store them to any format.That does not mean you're stuck with these limitations, though. The Ruby I18n gem makes it very easy to exchange the Simple backend implementation with something else that fits better for your needs, by passing a backend instance to the I18n.backend= setter.

This is where the incredibly useful gettext filter comes in. If you take a peek at your plugin's code you'll see strings like this: .gist table { margin-bottom: 0; } <?php _e( 'Related Products', 'woocommerce' ); ?> view raw sample-translatable-string.php hosted with by GitHub You can easily translate these strings by adding a filter to your functions.php file: .gist table { margin-bottom: 0; } <?php /** * Change text strings * * @link http://codex.wordpress.org/Plugin_API/Filter_Reference/gettext */ function my_text_strings( $translated_text, $text, $domain ) { switch ( $translated_text ) { case 'Related Products' : $translated_text = __( 'Check out these related products', 'woocommerce' ); break; } return $translated_text; } add_filter( 'gettext', 'my_text_strings', 20, 3 );

You might want developers building projects with this CMS to be able to change the behaviour of some UIs, or to be able to provide new components that can be consumed by the CMS. Those components can't easily be included in the JS bundle for the CMS, as it would require recompiling the shipped code with outside references.

Registering new services to the Injector If you've created a module using React, it's a good idea to afford other developers an API to enhance those components, forms, and state. To do that, simply register them with Injector.

Super flexible & extensible SilverStripe fits the outcomes you want, and doesn't force your business outcomes into an out-of-the-box solution. Customise to your needs!

Onivim 2 leverages the VSCode Extension Host process in its entirety - meaning, eventually, complete support for VSCode extensions and configuration.

The chosen approach pushes a lot of complexity out of the core. As a result it might take more code to achieve certain functionalities. This is the price of flexibility. And that's the primary design goal of Reactabular.

Reactabular has been designed to be extensible. Rather than implementing a lot of functionality in its core, it provides extension points. You can, for instance, customize rendering on cell level. It is possible to implement functionality, such as search, pagination, sorting, and inline editing, through composition.

But how could it be made more extensible?