Consider renaming `flatMap` to `chain` about most HOT 11 CLOSED

chain seems to be used since the last 10 month in fantasyland. Personally, I prefer to have a common vocabulary even if I do start to like flatMap. But personal preference is not likely to be the choice of the community.
I don't know when the status on TC39 did change, or move and if this is stable.

from most.

As of #14 it's been switched to chain, but I still don't think there's a clear winner. Fantasy-land still uses chain, while similar projects, such as Bacon.js and RxJS use flatMap.

from most.

flatMap seems better to me

On Mon, Jul 21, 2014 at 4:45 PM, Brian Cavalier [email protected]
wrote:

As of #14 #14 it's been switched to
chain, but I still don't think there's a clear winner. Fantasy-land still
uses chain, while similar projects, such as Bacon.js and RxJS use flatMap.

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#13 (comment).

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from most.

I prefer flatMap too. Should we provide both as aliases?

from most.

Sure !
On Jul 21, 2014 4:53 PM, "Brian Cavalier" [email protected] wrote:

I prefer flatMap too. Should we provide both as aliases?

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from most.

👍 for alias.

from most.

I've become averse to "do both", but in this case, it's just not clear what is the right criteria for choosing:

chain

Pros

• Used by fantasy-land
• Nice, short name
• Conceptually, monads provide sequencing for functional operations, hence the name "chain" makes sense: chaining computations together.

Cons:

• Not as immediately obvious what it does to anyone not familiar with monads
• Not used by as many other libs/languages. "oh, I see now, it's kinda like flatMap?"

flatMap

Pros
* Used by more other libs: Bacon.js, RxJS, Scala, other reactive libs in other languages
* Slightly more obvious what it does, at least in the list/sequence/stream domain. Nice contrast with .map

Cons
* Uglier to type?

Others?

Here's a thought: Designate flatMap as the primary API, and chain as the "fantasy-land compatibility" alias?

from most.

I would agree chain/flatMap is about composition but typing flatMap is not
ugly it relates to the map. It's also relating to the type of chaining you
want to apply. Chaining in a flatMap style. Chain seems more general but
here it's really a flatMap method like in other language. In other hands JS
Frw seems also to like chain like lodash for example but is it the same
principle ?

On Mon, Jul 21, 2014 at 5:17 PM, Brian Cavalier [email protected]
wrote:

I've become averse to "do both", but in this case, it's just not clear
what is the right criteria for choosing:
chain

Pros

• Used by fantasy-land
• Nice, short name
• Conceptually, monads provide sequencing for functional operations,
  hence the name "chain" makes sense: chaining computations together.

Cons:

• Not as immediately obvious what it does to anyone not familiar with
  monads
• Not used by as many other libs/languages. "oh, I see now, it's kinda
  like flatMap?"

flatMap

Pros

• Used by more other libs: Bacon.js, RxJS, Scala, other reactive libs in
  other languages
• Slightly more obvious what it does, at least in the list/sequence/stream
  domain. Nice contrast with .map

Cons

• Uglier to type?

Others?

Here's a thought: Designate flatMap as the primary API, and chain as the
"fantasy-land compatibility" alias?

—
Reply to this email directly or view it on GitHub
#13 (comment).

Best regards,

┏( ＾◡＾)┛ ┗(＾◡＾ )┓ I rock RaveJS! ┏( ＾◡＾)┛ ┗(＾◡＾ )┓

http://rivieragug.org/
http://3musket33rs.github.com/
http://fabricematrat.github.io/

from most.

In other hands JS Frw seems also to like chain like lodash for example but is it the same
principle ?

Good point, "chain" has different connotations in other libraries, like lodash as you mentioned. In lodash, _.chain is not flatMap

What do you think about the idea above to document flatMap as the primary API, and chain as the fantasy-land compatibility alias?

from most.

Ok, flatMap and chain are now aliases.

from most.

This doesn't seem documented yet. See pull/95

from most.