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2021-04-13 13:35:09 <ski> iow, you're (colloquially speaking) attempting to pass three parameters to `print' : `eval',`x',`0'
2021-04-13 13:35:29 <ski> however, you actually *wanted* to call `eval' with two parameters, and pass the *result* of that to `print'
2021-04-13 13:35:29 → alexm_ joins (~alexm_@161.8.254.229)
2021-04-13 13:36:11 <Komrad_Kafuka> It's a little hard to wrap your head around specially if you are used to imperative style, it's going to be hard before it make sense I guess
2021-04-13 13:36:56 × ddellacosta quits (~ddellacos@ool-44c73afa.dyn.optonline.net) (Remote host closed the connection)
2021-04-13 13:37:03 <ski> learning a different programming paradigm will be a little bit like learning to program from scratch, all over again. do you remember how long time it took, to get used to imperative programming ? to understand loops, assignment of mutable variables ?
2021-04-13 13:38:08 → ddellaco_ joins (~ddellacos@ool-44c73afa.dyn.optonline.net)
2021-04-13 13:38:27 <ski> people who already know another paradigm definitely have to do some unlearning, when learning a new one. it's been suggested that it might be easter to learn FP, as a complete newbie to programming (i'm not sure how true this is, but it seems to me that there's some trace of truth in it, at least)
2021-04-13 13:38:48 × xlei quits (znc@unaffiliated/xlei) (Quit: ZNC - https://znc.in)
2021-04-13 13:39:39 <Komrad_Kafuka> yeah, it's like learning programming all over again, could you please solve this for me ? I really want to learn how to do this
2021-04-13 13:39:48 <ski> it tends to be better to suspend judgement, to not try to compare with what you already know, as you're learning a new paradigm (as opposed to learning yet another language in the same paradigm). you're in a better position to compare, when you've got more under your belt (because obviously a lot does carry over. just quite a bit less than people often tend to assume)
2021-04-13 13:41:08 <ski> anyway, imho, the gains that you get, is well worth the effort. giving you another viewpoint, another set of tools you can apply and tackle problems with. and in the end, it's just that, another toolset
2021-04-13 13:42:01 <Komrad_Kafuka> yeah heard it's awesome to write parsers with so I am learning
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2021-04-13 13:42:22 <ski> (sorry for the rantish, but i believe it helps to repeat these basic points, to FP beginners, to set expectations right)
2021-04-13 13:42:30 <ski> what's the whole list of errors that you get ?
2021-04-13 13:43:39 <ski> (and yes, it will take some amount of time. don't try to rush it too much. try to have fun, if you can. that tends to help with learning)
2021-04-13 13:43:44 × kini quits (~kini@unaffiliated/kini) (Remote host closed the connection)
2021-04-13 13:43:48 <Komrad_Kafuka> here you go https://paste.tomsmeding.com/yUg3QcE0
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2021-04-13 13:45:35 <ski> (i'd rather prefer to not simply hand out solutions to exercises. you'll learn much better, by struggling a bit, perhaps banging your head against the wall a bit, and realizing the problem in your mistakes. however, of course, asking for conceptual understanding, and what went wrong, and what would be good to try instead, is quite fine)
2021-04-13 13:45:48 <ski> ok, so consider e.g.
2021-04-13 13:45:51 <ski> pow(x count)
2021-04-13 13:46:09 <ski> this means : call the function `x' with input `count', and pass the result of that call to the function `pow'
2021-04-13 13:46:10 → xlei joins (znc@unaffiliated/xlei)
2021-04-13 13:46:23 <ski> .. hopefully it should be clear why that is an error here
2021-04-13 13:46:34 <ski> eval (x (count + 1))
2021-04-13 13:46:37 <ski> has the same problem
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2021-04-13 13:47:15 <Komrad_Kafuka> uhuh ... yeah that's clear but we need the brackets don't we as you already demonstrated
2021-04-13 13:47:21 <ski> (also, not trying to rush you or anything, but you didn't get around to fixing the problem with your `print', yet)
2021-04-13 13:47:25 <ski> no
2021-04-13 13:47:34 <Komrad_Kafuka> because pow x count becomes (pow x) count
2021-04-13 13:47:49 <ski> yes, which is fine
2021-04-13 13:47:50 <ski> eval x count
2021-04-13 13:47:51 <ski> means
2021-04-13 13:47:55 <ski> (eval x) count
2021-04-13 13:48:06 <ski> and either is fine to write (but usually people prefer to read the former)
2021-04-13 13:48:11 <ski> however
2021-04-13 13:48:14 <ski> eval (x count)
2021-04-13 13:48:21 <ski> is something completely different
2021-04-13 13:48:42 → ddellaco_ joins (~ddellacos@ool-44c73afa.dyn.optonline.net)
2021-04-13 13:48:47 <ski> (in your case, something nonsensical, since `x' is not a function)
2021-04-13 13:50:06 → ksamak joins (~ksamak@185.169.233.12)
2021-04-13 13:50:26 <ski> perhaps to clarify : in your latest paste, you introduced two problems you didn't have before, while solving one earlier problem, and not solving another earlier problem
2021-04-13 13:51:30 <Komrad_Kafuka> yeah I got it , fixed all that , is this correct ? :- print eval (x 0)
2021-04-13 13:51:37 <Komrad_Kafuka> for printing
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2021-04-13 13:52:18 <ski> not exactly
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2021-04-13 13:52:21 × rj quits (~x@gateway/tor-sasl/rj) (Ping timeout: 240 seconds)
2021-04-13 13:52:35 <ski> you want to pass `x' and the initial value of the counter, to `eval', then pass the result of that to `print'
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2021-04-13 13:53:40 <Komrad_Kafuka> so the error that I'm having https://paste.tomsmeding.com/ny9K69ti is because of this right ? so what does my experssion indicate ?
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2021-04-13 13:59:10 ski blinks
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2021-04-13 14:00:48 Nicolai is now known as Guest42754
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2021-04-13 14:03:33 <Guest42754> HI, does someone know how to install Haskell on a MacBook newest version? Whenever I download and try to run ghci, it says "zsh: command not found: ghci"
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2021-04-13 14:06:35 <hypercube> hi Guest42754
2021-04-13 14:06:49 <hypercube> do you have brew setup?
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