Clojurians Log v2
Clojure programming
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core-async
manas_marthi 2025-01-31T21:53:36.657019Z
hi, the (go block in below function is not running if I comment the first (println call. If the entire function body is the go block, then the function is returning a channel instead of evaluating the go block. Please advise the reason
(defn test-db []
;(println "0. Testing database connection")
(go
(try
(let [_ (js [])))
]
(js/console.log "1. Database connected ok:>>>>" rows)
( 
2025-01-31T22:01:41.102029Z
the result of evaluating a go block is a channel
👍🏽 1
2025-01-31T22:03:27.072159Z
user=> (a/go)
#object[clojure.core.async.impl.channels.ManyToManyChannel 0xadeb5a6 "clojure.core.async.impl.channels.ManyToManyChannel@adeb5a6"]
user=> (go ...) returns a channel is the samemanas_marthi 2025-01-31T22:21:58.461419Z
How should I change the function so that the node.js runtime evaluates the go block
2025-02-01T01:15:53.975869Z
what makes you thing it isn't being evaluated?
2025-02-01T01:15:57.809219Z
think
2025-02-01T01:16:15.484909Z
it is supposed to return a channel when evaluated
manas_marthi 2025-02-01T01:48:43.852929Z
The console.log statements are not running.
2025-02-01T01:50:47.329129Z
The node repl likely never yields the event loop, or does it only at specific points, so stuff scheduled to run later (the go loop) never gets a chance to run
manas_marthi 2025-02-01T02:16:50.721779Z
Oh ok.. Let me see if it works after I build and run instead of repl execution
manas_marthi 2025-02-01T03:47:41.533319Z
You're right. When I compile and run the js file, the code worked fine
manas_marthi 2025-02-01T03:47:48.214259Z
thank you
manas_marthi 2025-02-01T06:22:23.355459Z
I wish I could force the repl to yield. I am not clear on how it all works under the hoods.. . There was some PR node js to allow await at the top level in the repl . https://github.com/nodejs/node/pull/15566 . Not sure how it works in the context of cljs repl evaluations