Recs.
Updated
Specs
Pros
Pro Simple, flexible, hackable FFI
As with UHC, the FFI to Javascript works with printf-style format:
max = ffi "Math.round(%1,%2)"
This can simplify code needed to make calls to methods on objects, in contrast to e.g., Purescript's FFI, which requires that methods be wrapped in Javascript. Similarly to UHC, Fay also supports the use of %*
, for javascript functions with arbitrary numbers of parameters, such as concat
, though they must expose an explicit number of parameters to Fay.
Pro Subset of Haskell - nothing new to learn
Since Fay is a subset of Haskell - Lazy, statically typed, and pure by default. There's no new syntax to learn, and no surprises when it comes to the semantics of your code. This extends into function names as well - Fay programmers can use familiar functions such as putStrLn
to output to the console, rather than Javascript-specific versions.