Special case check = Non-obvious, non-boundary special values, for example log(1 + the smallest floating point number).

Edge / Boundary check = The maximum or minimum input which is expected to produce correct output

If your code doesn’t have to run on Ruby 2.6 or older, you may try the new style in Ruby 2.7. In almost all cases, it works. Note that, however, there are unfortunate corner cases as follows:

Ruby 2.6 or before themselves have tons of corner cases in keyword arguments.

I don't want Svelte to go out of its way to try to catch all these edge cases. It would require lots of fragile heuristics in the compiler. I want a solid compiler I can trust, not something magic but often out of service. I want it the simplest possible.

if we create a new branch or scope for some corner cases, we should have full features of a component without creating a new file

And to illustrate another way actions are helpful, take your above example and put the button into a {{#each}}. It gets more complicated.

According to our understanding of the inconsistencies, the feature was likely trying to support too many edge cases. All caching strategies have weaknesses and eventually break down if the usage is not properly scoped.

This represents the leap second inserted at the end of 1990. 1990-12-31T15:59:60-08:00