Logs: freenode/#haskell

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2020-10-26 03:51:49	×	notnatebtw quits (~nate@125.161.130.165) (Quit: WeeChat 2.9)
2020-10-26 03:52:14	<mikevdg>	no idea. I think you just treat it like a sorted collection and choose a different root.
2020-10-26 03:52:49	<mikevdg>	It's the prototypical job interview question.
2020-10-26 03:53:16	<ghoulguy>	"An inversion, or mirror, of a Binary Tree (T), is just a Binary Tree M(T) whose left and right children (of all non-leaf nodes) are swapped."
2020-10-26 03:53:46	<mikevdg>	so, `reverse` then?
2020-10-26 03:53:50	<c_wraith>	so that's like... 2 lines?
2020-10-26 03:53:54	×	Guest_86 quits (96cb02f0@150.203.2.240) (Remote host closed the connection)
2020-10-26 03:54:02	<Axman6>	so invert (Branch a l r) = Branch a (invert r) (invert l); invert a = a
2020-10-26 03:54:05	→	merijn joins (~merijn@83-160-49-249.ip.xs4all.nl)
2020-10-26 03:54:23	<ghoulguy>	except if mikevdg wants to do it as an exercise then maybe don't look up
2020-10-26 03:54:31	<mikevdg>	ah, but you can't use Haskell. That's cheating. Write it in C like a proper coder.
2020-10-26 03:54:46	×	geowiesnot quits (~user@87-89-181-157.abo.bbox.fr) (Ping timeout: 246 seconds)
2020-10-26 03:55:08	<koz_>	mikevdg: Proper coders write x86 assembly. By hand. :P
2020-10-26 03:55:18	<c_wraith>	The only difference in C is that there's a bunch more syntax.
2020-10-26 03:55:52	×	tromp quits (~tromp@dhcp-077-249-230-040.chello.nl) (Ping timeout: 260 seconds)
2020-10-26 03:57:41	<Axman6>	node_t * invert(node_t * t) { t == NULL ? return NULL : { node_t * tmp = t->l; t->l=invert(t->r); t->r=invert(tmp);}}
2020-10-26 03:57:48	<mikevdg>	neat.
2020-10-26 03:57:56	<Axman6>	or something, I have no idea
2020-10-26 03:58:07	<mikevdg>	I wonder how well it would go down if I did do it in x86 assembly on a white board?
2020-10-26 03:58:26	×	GyroW quits (~GyroW@unaffiliated/gyrow) (Quit: Someone ate my pie)
2020-10-26 03:58:27	<mikevdg>	I could probably just write gibberish and they'd never check it.
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2020-10-26 03:59:20	<ghoulguy>	You'd probably just convince them you'd be difficult to work with and not impress?
2020-10-26 04:00:54	<mikevdg>	Yea. I was at a Java job interview and they were asking me about VMs, lambdas, etc. They cut me off everytime I drew a comparison to other languages.
2020-10-26 04:01:05	<dsal>	I wrote tons of asm in high school for/on my calculator. Last asm code I wrote was for AVR. It did a useful thing for a tiny program. Demultiplexed a PPM signal onto discrete output channels on an ATTiny85 in ~70 lines of code. Debugged it on an oscilloscope. heh
2020-10-26 04:01:11	<int-e>	Axman6: that'll be fun if there's sharing :)
2020-10-26 04:01:21	<T0pH4t>	Axman6: not to bother, not sure if u looked at that example.
2020-10-26 04:02:08	<ghoulguy>	int-e: Is it still a tree if there's observable sharing?
2020-10-26 04:02:26	×	ChaiTRex quits (~ChaiTRex@gateway/tor-sasl/chaitrex) (Remote host closed the connection)
2020-10-26 04:02:27	<Axman6>	T0pH4t: sorry, in a meeting at the moment
2020-10-26 04:02:44	<Axman6>	int-e: YOLO
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2020-10-26 04:02:54	<T0pH4t>	np
2020-10-26 04:03:11	<int-e>	ghoulguy: as long as you don't actually observe it ;)
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2020-10-26 04:05:48	<int-e>	Hmm, I guess there's too little going on in that function to be Turing-complete.
2020-10-26 04:05:55	×	Amras quits (~Amras@unaffiliated/amras0000) (Ping timeout: 272 seconds)
2020-10-26 04:06:57	hackage	exception-via 0.1.0.0 - DerivingVia for your hierarchical exceptions https://hackage.haskell.org/package/exception-via-0.1.0.0 (parsonsmatt)
2020-10-26 04:08:07	<crestfallen>	mikevdg, wtf now I can backspace only to the eighth space on the ghci prompt line. it stops dead, but doesn't jump off the line :)
2020-10-26 04:08:49	<mikevdg>	umm.. okay. I'd try creating another user and logging in as that user to see if it's a global problem or in ~/.config somehow.
2020-10-26 04:09:21	<mikevdg>	Or try using `xterm`.
2020-10-26 04:09:35	<mikevdg>	It's the old workhorse granddaddy terminal emulator.
2020-10-26 04:09:44	<Axman6>	my C above is missing a return t
2020-10-26 04:12:13	<int-e>	Axman6: yeah, my brain autocorrected that :P
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2020-10-26 04:12:30	<crestfallen>	mikevdg, thanks a lot , what should I look for in .config ?
2020-10-26 04:13:06	<crestfallen>	it is global btw , earlier I was trying it in x11
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2020-10-26 04:13:23	<Axman6>	int-e: I guess I'll never work for Google :'(
2020-10-26 04:13:28	<mikevdg>	You don't really look in .config unless you're really keen. It contains all your settings.
2020-10-26 04:13:59	<crestfallen>	mikevdg, what setting may be off though?
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2020-10-26 04:16:43	<mikevdg>	There's lots of things. You have the environment variables TERM, COLUMNS. You could have a version of ghci that's been compiled funny without readline or whatever alternative it might use. You might have a screwed up terminfo database. You might have a misconfigured /etc/inputrc
2020-10-26 04:17:07	×	thir quits (~thir@p200300f27f2523003c23ef77843b8858.dip0.t-ipconnect.de) (Ping timeout: 260 seconds)
2020-10-26 04:17:21	<mikevdg>	You're talking about a really deep rabbit hole that has 50 years of history to screw things up.
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2020-10-26 04:17:51	<mikevdg>	Personally I suspect you've got the settings in gnome-terminal wrong.
2020-10-26 04:18:14	<crestfallen>	but which setting(s) ?
2020-10-26 04:18:50	<mikevdg>	Edit -> Preferences -> Compatibility
2020-10-26 04:19:00	<mikevdg>	"Backspace key generates": ASCII DEL
2020-10-26 04:19:09	<mikevdg>	Delete key generates": Escape sequence
2020-10-26 04:19:21	<mikevdg>	Encoding - always UTF-8 unless you're encoding a URL
2020-10-26 04:19:41	<mikevdg>	Actually just hit the "Reset" button at the bottom of that settings form.
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2020-10-26 04:21:19	<crestfallen>	reset it is! thanks trying that mikevdg
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2020-10-26 04:25:07	<mikevdg>	Just looking at ghc. It looks like it uses ncurses directly.
2020-10-26 04:25:41	<crestfallen>	very sorry pls explain. resetting (they were already as you suggested) didn't fix it
2020-10-26 04:27:45	×	merijn quits (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 240 seconds)
2020-10-26 04:29:13	<mikevdg>	Sorry, I can't replicate your problem. "It works on my machine" even if I screw with a lot of settings.
2020-10-26 04:29:36	<mikevdg>	Having said that, it was an ordeal just getting ghci to work.
2020-10-26 04:31:20	<crestfallen>	thanks my friend.. really appreciate it. later mikevdg
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2020-10-26 04:45:08	bitmagie1	is now known as bitmagie
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2020-10-26 04:45:35	<ptrcmd>	is it possible to ask stack to give me a list of packages used to run a .hs file with commands like "stack --resolver lts-16.1 XX.hs"?
2020-10-26 04:46:25	<ptrcmd>	I want to run ghci with the packages used in the .hs file
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2020-10-26 04:48:59	<ptrcmd>	hmm..telling stack to give me verbose output works
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