I will second the semi-negative Korma experience - it works well with simple data models, but starts getting unwieldy if you need to do more complex things. Also global state makes for some occasionally hard-to-understand magic. This was a while ago though, so could be different now. Currently using HoneySQL and some macros to simplify the coercion from relations to entity maps, very happy with the direct control over the statements.

In spec I want to model a map where some keys depending on the value of one key. {:type :circle :radius 12} and {:type :rectangle :x-side 10 :y-side 10. Should I write ::circle and ::rectangle and then do (s/def ::shape (s/or :circle ::circle :rectangle ::rectangle) ?

Is there any macro or such for checking a bunch of predicates at once without anding and passing the same argument over and over? For example I want to convert this: (and (int? x) (pos? x) (odd? x)) into this: (some-op int? pos? odd? x) or ((some-op int? pos? odd?) x)

Scratch that. every-pred is what I was looking for.

How can I specify something like {:type :circle } and {:type :rectangle } and I can't have it as (s/def ::circle-type #{:cricle } and use (s/def ::circle (s/keys ::req-un [::circle-type]) and rectangle-type because then it will make user supply :circle-type and :rectangle-type instead of using :type with different values.

Got it answered here : https://stackoverflow.com/a/43873866/2610955

@jmckitrick @arrdem consider spicerack, "a Clojure wrapper for MapDB — a fast, disk-persistent data-structures library." https://github.com/jackrusher/spicerack

Clojure-idiomatic storage of Clojure data structures to disk

is enlive abandoned?

@mailmeupinside more “done” than abandoned.

:thinking_face: interesting God, these new emotes are disgusting thanks for answering though

I started walking through an om next tutorial a few months ago, now i am working on a re-frame project and when i download the project and lein figwheel it starts a server on the specified port and says it compiling the right resource buy my browser loads the om next tutorial html. I tried changing the port but still no luck. any ideas?

'lein clean' before 'lein figwheel' and/or make sure there is nothing cashed in your browser.

i've tried both.. i even stooped so low as to open up ie browser since i know it won't be cached there

Maybe there's a bug in the new cljs cashing, I'm not sure where it's stored.

i installed bash on windows and lein / java on there and oddly it still is showing me the om project html :man-shrugging:

okay, so oddly enough if i hit localhost:3450 it shows the om next page but if i hit localhost:3450/example.html then it shows the right resource

someone had the experience of useing postal for smtp mail delivery and get something spam filtered

Caused by: 
com.sun.mail.smtp.SMTPSenderFailedException: 550 5.7.1 Rejected: <removed-my-ip> listed at |

My colleagues like the LINQ-inspired syntax of Slick. I don’t see anything like that for Clojure yet

@daveliepmann good find!

would it be very non-idiomatic to create my own exception class? couldn't find any mention of it in the docs either, only an outdated discussion here https://stackoverflow.com/questions/3835331/custom-exceptions-in-clojure

@matan yes, use ex-info which allows attaching arbitrary data to an exception

great! I had a feeling there's a more idiomatic way

you can use a multi-method or whatever on the ex-data of the exception in the catch block

so essentially that's an exception type that only clojure code would normally use... with some clojuresque goodies with it

i'll read it up

@matthewdaniel are you really using om next?

@matan ExceptionInfo is a subclass of exception, you catch that specifically - yeah

you can have a clause for ExceptionInfo and another for regular Exception etc.

yep, got it :thumbsup:

I assume there's some idiom for making sure the exception is a clojure (ex-data) one too is there?

otherwise a plain unexpected exception in some Java component would crash a naive clojure catch block

@matan you can have multiple catch blocks (try (f) (catch ExceptionInfo e ...) (catch Exception e ...))

oh well, I'll just catch ExceptionInfo

that's what I was trying to say earlier

🙂

it's the same thing you'd have to do if you subtyped Exception, which was your original question

correct!

great to have clojure exceptions which carry data!