I feel that somehow clojure constructs are more elegant than haskell ones.

The way clojure handles recursion, map, filter, etc feels more elegant.

@crocket: the dynamic nature of clojure can sometimes bring more convenience (and elegance, although highly subjective)

It's not just dynamic nature of clojure that brings more convenience.

@crocket: examples?

There are dynamic or lisp languages that aren't as elegant.

@crocket: you were comparing to Haskell, so I meant to ask for an example of this

I can't think of a good example right now, but clojure syntax is easier to read and write than haskell's.

subjective

It's definitely easier to write due to haskell's picky syntax rules.

I agree with that

easier to read due to simple syntax rules.

Haskell's picky indentation makes it more difficult to read and write in haskell.

I don’t know if anyone here cares about object capabilities, but for some crossing the stream stuff: here’s applications of relational programs to them 😄 https://people.cs.kuleuven.be/~dominique.devriese/obj-cap-log-rel-eff-param.pdf

anyone know of a tool that detects and removes unused dependencies in your project.clj?

I think lein-ancient can detect outdate deps, not sure about unused though

https://github.com/clojure-emacs/refactor-nrepl would be the most likely suspect, and it looks like it can't do that.

You'd have to somehow construct a mapping from namespaces to classpath elements and classpath elements to dependencies, then tree shake.

Doable but requires a lot more runtime introspection than most things try to achieve.

there are, um, I guess you call them dependency patterns that would break with that

some of the jre apis allow you to override and specify plugins or whatever via property files on the classpath

but I will say, encounters with that have been few and far between for me

Anyone knows if clj-aws-s3 is still being maintained? https://github.com/weavejester/clj-aws-s3

roberto: Unfortunately not. It’s not a library I’ve used in a while.

ok, thank you for replying, and for the library. I really like it, but just stumbled on something I need to do but the library doesn’t support. I’ll probably fork it and see if I can make it do what I want.

it would probably save me some extra work if the s3-client was not private tho

The original idea was that I didn’t want to expose the underlying implementation in the public API

But in retrospect s3-client probably should be public.

There’s also https://github.com/mcohen01/amazonica

yeah, I need to reuse it so I can call list-object over and over to get a large list of s3 files

yeah ,I was using that initially, but your library was much more easier to use. It just felt ergonomically better

s3-client should be automatically reused. It’s memoized.

yeah, but I can’t use it in my own function

for example, I need a new list-objects that takes an ObjectList instead of creds and bucket name

so I can call listNextBatchOfObjects

Ah

yeah, I was wondering why it wasn’t listing all the files on the bucket, until I read the javadoc.

The url is the repo to deploy to. You can just use :clojars, as Leiningen knows about Clojars as a special place. Join #clojars for more help on this if you like.

Hi a question about schema. I want to define a type as (or A B). I can’t seem to find any docs for it.

there is either but deprecated https://github.com/plumatic/schema/blob/master/src/cljx/schema/core.cljx#L457

the comment mentions using conditional instead

@shriphani: (cond-pre A B)

@bfabry: perfect!

@jr: thanks for the links.

Is there a way to have the expected value in clojure test return the result rather than the code that was used to generate that result? Example:

(is (= (let [x 1
               y 2]
           (+ x y)) 4))

(let [res (let [x 1 y 2] (+ x y))]
  (is (= res 4))
  res)

@kenny:

Do you need the double let?

@arrdem:

@kenny: no you can collapse them, so long as you let-bind the result you want to is test and then return.

(let [x   1
      y   2
      res (+ x y)]
  (is (= res 4))
  res)