Clojurians Log v2

Welcome @slack1304 and @seminioni!

thank you @borkdude im newcomer in clojure(script) world, so hope will find a lot of interesting here 🙂

Hi all. Is it possible to extend protocols to clojure maps and functions with bb? I'm having a look at getting tick library working and it does

(extend-protocol Foo
  clojure.lang.Fn
  ...

@henryw374 Do you have an isolated small example for me?

@henryw374 This works in bb:

(defprotocol Foo
  (foo [_]))

(extend-protocol Foo
  Number
  (foo [x] (prn :x x)))

(foo 1)

But some classes aren't available (yet) which can be potentially fixed in the next version

ok so I found clojure.lang.IFn is there, so tick could use that instead of clojure.lang.Fn I think, but for maps,

#!/usr/bin/env bb

(defprotocol Foo
  (bar [_] ))

(extend-protocol Foo 
  clojure.lang.IFn
  (bar [f] (f))
  clojure.lang.APersistentMap
  (bar [x] x))

(bar (fn [] "yay!"))
(bar {})

so I guess clojure.lang.APersistentMap would need adding, unless there's an alternative

a map is also an IFn, so not sure which one would take priority there

interesting!

yeah good point, I'll dig in. thanks

there is IPersistentMap in bb btw

:thumbsup:

@henryw374 This works:

#!/usr/bin/env bb

(defprotocol Foo
  (bar [_] ))

(extend-protocol Foo
  clojure.lang.IPersistentMap
  (bar [x] [:map x])
  clojure.lang.IFn
  (bar [f] [:fn (f)]))

(prefer-method bar clojure.lang.IPersistentMap clojure.lang.IFn)

(prn (bar (fn [] "yay!")))

(prn (bar {}))

🙂

cool. I'm fairly sure I can get tick working then

if we added clojure.lang.Fn to bb then you could leave out the impl detail

hmm, that'd be nicer for sure

ok, I'll include that in 0.2.7, let me know when you want to release tick for bb, so I can push a new release

great thanks. no great hurry really 🙂

Babashka 0.2.7 released We are re-introducing Alpine images along with the main Ubuntu image (thanks @rahul080327) https://hub.docker.com/repository/registry-1.docker.io/babashka/babashka/tags?page=1&ordering=last_updated And various other small improvements (like the one discussed earlier today).

Someone got babashka to work on Raspberry: https://github.com/babashka/babashka/issues/241#issuecomment-763976749

Nice, works fine on my Pi 🙂 (And I'm using the 64 bit version of the OS)