Discuss
  • Proposal: Chainable do sugar

Proposal: Chainable do sugar

# Paul Gray (5 years ago)

Hello friends!

I’d love to discuss the potential for syntax sugar around a popular fp pattern, chainables!

I’ve written up a document here pfgray/ecma-proposal-chainable-do-syntax with the

details.

I’ve also written a small Babel plugin that implements this. Here’s a codesandbox codesandbox.io/s/4qkl21666w with it loaded up.

Thanks for your time!

  • Paul Gray
# Michael Luder-Rosefield (5 years ago)

It's OK, you can say the m-word here. Monad. See? Nothing bad wi--

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# David Teller (5 years ago)

Fwiw, generators can already be used as syntactic sugar for monads.

Cheers, David

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# Paul Gray (5 years ago)

I would say "Monad" is a very precise term with lawful implications.I left it out since there is no requirement for the value to actually be a monad (Only that it has a chain and map method, hence 'chainable').

Not sure if it's worth being that precise, though.

"flatMap" is also another option, instead of "chain" (especially since arrays now have flatMap)

# Paul Gray (5 years ago)

I believe generators only work for certain monads, as explained here: stackoverflow.com/a/32192145

# Isiah Meadows (5 years ago)

I feel JS should first have a concept of what a monad (or functor) is before it adds sugar for it. This just feels too early.