rescript-jest VS proposal-pipeline-operator

Another popular option is to use bindings for Jest. However, in my opinion, Jest is a monstrous combine that is slow, has a hacky mock system, bad ESM support, and purely tries to mimic DOM API with JSDOM. AVA literally doesn't have any of these. Also, the available Jest bindings don't allow doing multiple assertions per test, which is often useful to me.

In order to write tests in ReScript, and thus test your code directly, you can use bs-jest, which provides ReScript bindings to Jest. If you prefer, you can also use the slightly less mature bs-mocha. You can also test the generated JavaScript or TypeScript files with no extra configuration.

Current Status: You'd have to check the TC39 proposals repository or the official proposal text for the most recent status. As of my last update, it had not yet reached Stage 4 (final stage) of the TC39 process, which means it wasn't part of the ECMAScript specification yet.

Javascript may get it https://github.com/tc39/proposal-pipeline-operator https://youtu.be/dQw4w9WgXcQ

It can be further simplified. For example, you don't need two separate functions to extract the first chat completion message etc.

This version:

- uses existing language constructs

- can be immediately understood even by the most junior devs

- is likely to be 1000 times faster

- does not rely on an external dependency that currently has 143 issues and every two weeks releases a new version adding dozens of new methods to things

Note: one thing I do wish Javascript adopted is pipes: https://github.com/tc39/proposal-pipeline-operator

Still in stage 2 atm https://github.com/tc39/proposal-pipeline-operator

Both are active tc39 proposals :)

https://github.com/tc39/proposal-pipeline-operator - Stage 2

https://github.com/tc39/proposal-pattern-matching - Stage 1

Hopefully we get both in the next couple of years.

Some time ago I saw how hyped JS community was about pipeline operator proposal. So I tried to make something similar in python. There is how tipe module was created. Check it out if you are interested: https://github.com/mishankov/tipe

We often add promising TC39 proposals into Civet so people can experiment without waiting.

We've added https://github.com/tc39/proposal-pipeline-operator, a variant of https://github.com/tc39/proposal-pattern-matching, a variant of https://github.com/tc39/proposal-string-dedent and others.

Since our goal is to be 99% compatible with ES we'll need to accommodate any proposals that become standard and pick up anything TC39 leaves on the table (rest parameters in any position, etc.)

The Proposal is for the Hack pipe, so your example would be