The APL Orchard - 2018-05-21

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10:42 AM

See you at @lambda_conf where #APL and #Dyalog will be represented by Aaron Hsu. Aaron is running a workshop on Day1 of the conference about High-productivity, high-performance, parallel-by-construction tree manipulation with #APL https://twitter.com/lambda_conf/status/998265860987875328

Tweeted by dyalogapl on May 21, 2018 at 9:59 AM

4 hours later…

2:22 PM

Dude, problem 7 was hard to do without guards.

3:11 PM

@J.Sallé I didn't find it hard!

That XML problem though ... ugh

That XML problem though ... ugh

@Zacharý lol I'm the complete opposite apparently. I did the XML problem in like 30 seconds.

Is there a quad thing I'm missing?

Maybe? Idk :p

Was #1 easy, or was it just me?

@Zacharý It took me a while, but it wasn't actually hard

#3 and #7 gave me the most problem up until now

3:20 PM

Okay, good.

#3? That was one of the easiest on my ends.

It might be slow as molasses, but my solution works

Well I had to actually learn how to use ⌸, so that was part of my problem

Ah.

#2 was easy as heck though, right?

After I finish at least one set of Phase II, I'm going back to revise Phase I.

I'm determined to beat Douglas this year

@Zacharý yeah, I made it in 5 bytes

Not counting parens, right?

yes, not counting parens

3:28 PM

Probably have the exact same solution

It's like that average problem from phase II last year.

for 6, is <abc><def></abc></def> valid?

@Cowsquack I don't think it matters for anything not on the test cases? Not sure.

I only tested my solutions on the given TCs though

If either that or '/' are invalid, then I'm dead on #6

3:43 PM

Well, good luck to all of you!

3:59 PM

@Cowsquack I think that even nonsense strings like xy<zz><><k>l are supposed to return 1 there

@H.PWiz I don't think that would return 1. Maybe his, not yours

> returns 1 if the angle brackets
> are properly balanced and 0 if not

Where "properly balanced" has a particularly simple definition

I may be interpreting the problem too literally though

I did exactly the same though

Mine's gonna return 1 for anything that's balanced, such as <> <><><>, but I think it'll return 0 for <<>>

^ It does

It's only asking for angle bracket validation ... I went a little overboard

2 hours later…

6:14 PM

did anybody try to golf phase 1?

@ngn I thought about how I would golf some of them (Including some of the shortenings). But I haven't put a great deal of thought towards it

I'm pretty sure everyone did for problem #2...

I tried to have them reasonably golfed, except for the zodiacs

That's honestly what I did (not too golfy though)... except I put them all as dfns (except #2 ofc)

@Zacharý the rules explicitly allow trains too

6:21 PM

I know, it's just that if I put some of the other ones as trains, it would become unreadable.

they don't say anything about "complete programs", so I guess those are not acceptable

@ngn me too

3 hours later…

9:41 PM

@Adám, for the BigInteger questions: can it be assured you can ⍎ the number without giving a domain error? Also, how does one make a change to ⎕IO local in a tradfn?

1 hour later…

11:01 PM

@Zacharý Yes, but you may of course loose precision with ⍎. Just localise ⎕IO like any other variable.

I know that I'll lose precision; I have a use in mind.

is there an easy way to bring all names from a given ns into the current ns? like "from ns import *"?

@ngn 'CurrentNS'⎕NS GivenNS

@Adám thanks! it works :)

Is ngn doing this for the Professional entry prize?

11:17 PM

@Adám it's behaving strangely though - I can't call it more than once

@Zacharý "professional"?! :)

"Non-student Award" is what I meant

#!/bin/bash
(echo ∇M;tail -n+3 $0;echo -e '∇\nM\n⎕off')|MAXWS=4G dyalog -script;exit $?
c←⎕fix'file://Contest2018.dyalog'
'#'⎕ns c.crypto
'#'⎕ns c.neural ⍝ DOMAIN ERROR

@Adám @Adám ^

@Zacharý I'm just wasting my time because I like solving problems, I don't have much hope for an award in this contest...

@Zacharý and of course I'm not a student, so I'm not a threat to you young people :)

11:36 PM

Oh, and for the XML question, does "properly balanced" refer to the XML tags, or just the angle brackets?

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