so does anyone know how to print out a transient vectors contents? if you know what i mean

No worries if not

I'd probably try asking in #C03S1KBA2 - that doesn't really sound like a beginner question 😛

ah sorry

cheers @kauko :thumbsup:

in your snippet, if you add in a (println “i am here”) at line 12-13 and run it again what do you get

between the let and loop i mean

my gut feeling is saying that you might not be evaluating the pretty-print

I think loop recur is lazy

i could be wrong, but if you replace your do with doall does that fix it?

also, the do isn’t needed

So, I did try the println, but to no avail

Nor does the doall seem to work

@roberto I did originally have a version that did not use do

Instead I printed the statements one after the other

yeah just trying your code on mine too, looks likeits just hanging

Oh, I got some output

It's severely delayed

If I mash some keys it will eventually print out twenty grids in a row

Well at least it works, sort of

😄

also, (read-line)

yeah

in the loop binding, no need to call the function again (at that point it isn’t a function anymore)

well, it is, but you are calling it twice, I’m sure that would cause some wonkiness

nevermind, I take it back

You know, I don't think it's delayed

it prints out every 32or so for me

Yeah, if I stop typing it will stop printing

The hell did I do

it just feels like its waiting on input

which makes sense because of your read-line right?

Yes, because the game should only update when the user makes an action

yes

@guy just to be clear, I didn't mean you shouldn't ask that question here. I meant #C03S1KBA2 has 6 times more people than this channel, and your question sounded advanced enough to warrant asking there (not that there's some level of clojure skill you have to have to be allowed to talk there 😄 )

yeah no worries @kauko

it got answered so im happy!

to be clear, loop/recur is not lazy

aha!

Apologies

and doall is intended for functions that return lazy collections, not simply to force any expression

can you give an example?

(doall (map fn coll)) like that?

yep

cool

thanks

playing with clj-time and feel really dumb. i can’t for the life of my figure out how to “use” a formater

it seems to me you should be able to use it like you see it in show-formatters

(f/unparse :date-time-no-ms (t/time-now))

@chadhs: you need to load the formatter first

(f/formatters :basic-date-time)

then you can use it in parse/unparse

@oahner: did i miss that in the docs? it seems to jump right from “here’s how you see a list of parsers” to “here’s how you use a custom one"

@chadhs: I don't know if it's stated as such, but parse/unparse definitely accepts a formater object as its first argument, not the formater's keyword

ah there

it goes from (def custom-formatter (f/formatter "yyyyMMdd")) to (f/parse custom-formatter "20100311")

here, noticed this: (def built-in-formatter (f/formatters :basic-date-time))

right, so here you'd pass built-in-formatter to f/unparse

f/formatters returns a formatter object

maybe it’s just me but this seems so complicated just to return a time value, compared to the UNIX date command that is.

the API around formatters could be made more ergonomic

as it stands, it's just a wrapper around joda

ah… thus the objecty-ness (word?)

thnx for helping me with this @oahner

that would be my guess

@oahner: this ended up working well for me

(defn get-current-iso-8601-date
  "Returns current ISO 8601 compliant date."
  []
  (let [current-date-time (time/now)]
    (time-format/unparse
     (time-format/formatters :date-time-no-ms)
     current-date-time)))

(get-current-iso-8601-date)

now i just need to play with a little date math

(time/minus (time/now) (time/hours 24)) cool, getting it a bit now.

How do I refer to files in my resources folder so that they work with an uberjar (leiningen)

@bfast:

oahner: That does not seem to work

do the files you're targeting actually make it into the uberjar?

yes, I did a jar -tf | grep myfiles

and they were there

hmm maybe im just messing up

sounds like there's something else at play here

yes, the joy of lisp thanks oahner

Make sure not to give a path. Just (io/resource "abc") for "abc" directly in the resources directory.

in cljs, if def produces ordinary JS variables, what does ^:dynamic do when applied to a def?

Trying to understand why when I put the function into the scope of another function, its behavior suddenly changes:

(first (map #(dep/transitive-dependents graph %1) [:a :b]))
=> #{:c :f}
(defn task2 [ruleset facts]
  (let [graph (reduce apply-rule (dep/graph) ruleset)
        dependents (map #(dep/transitive-dependents graph %1) facts)])
  (first dependents) )
=> #'task2.core/task2
(task2 ruleset [:a :b])
IllegalArgumentException Don't know how to create ISeq from: task2.core$dependents  clojure.lang.RT.seqFrom (RT.java:528)

How is graph constructed in the first?

ah, the graph

by the way (map (partial dep/transitive-dependents graph) facts)

it''s an equivalent to what I did?

Yeah

never quite understood partial hence that way

We just take a function that needs 2 arguments, supply 1 with partial, and we get back a new function that only requires that last argument

(def rule1 [[:a :b] :-> :c])
(def rule2 [[:c :d :e] :-> :f])
(def rule3 [[:k :d :e] :-> :m])
(def rule4 [[:p :t] :-> :k])

(def ruleset [rule1 rule2 rule3 rule4] )

(require '[com.stuartsierra.dependency :as dep])

(defn apply-rule
  [graph rule]
  (let [[premises _ consequence] rule]
    (reduce #(dep/depend %1 consequence %2) graph premises)))

perhaps I need to stick this apply-rule inside the task2 somehow too

to come up with just one function eventually: task2 [ruleset facts]

but in any case, what I don't get is why the difference in how the (first ) behaves on the result

does it make sense?

Yeah, since your first snippet didn't show the definition of graph, but it's created in the task2 scope, I was wondering if it may not be identical.

anything glaring?