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The New Haskell Homepage

new-www.haskell.org

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Re: The New Haskell Homepage

#131

Post by throwaway_yy2Di »

ufo wrote: post #35

It bugs me a bit that the example code is brute force trial division instead of a true prime sieve. Sure, it highlights lazyness but the algorithm is less efficient. http://www.cs.hmc.edu/~oneill/papers/Sieve-JFP.pdf

Well it's the haskell.org landing page, of course they're showing off the type of code that Haskell is good at. In your link, the purely functional version (15 lines around a priority queue) is more complicated than a naive version with a mutable array, so why would they advertise it?

Re: The New Haskell Homepage

#132

Post by moomin »

gamegoblin wrote: post #117
codygman wrote: post #115

Earlier quoted context omitted.

Wow, you should turn this into a tutorial on FPComplete or something. Maybe there could be an "explain" link under the Haskell example on the homepage and it link to a tutorial like this one.

I'm actually recoding my website right now with a webserver and framework I custom built in Haskell. Maybe I'll make some of my first posts on this topic in a more formal, less commenty manner.

Do, this thing needs a more permanent home.

Re: The New Haskell Homepage

#133

Post by dbenamy »

gamegoblin wrote: post #117
codygman wrote: post #115

Earlier quoted context omitted.

Wow, you should turn this into a tutorial on FPComplete or something. Maybe there could be an "explain" link under the Haskell example on the homepage and it link to a tutorial like this one.

I'm actually recoding my website right now with a webserver and framework I custom built in Haskell. Maybe I'll make some of my first posts on this topic in a more formal, less commenty manner.

But the commenty style is awesome!

Re: The New Haskell Homepage

#134

Post by blitzprog »

okasaki wrote: post #99
forrestthewoods wrote: post #95

I get paid to write C++ code. I'm pretty good at it. I understand it's normal usage syntax very well. I don't fucking know what a god damn thing means in Haskell. λ 5 + 7 12 :: Num a => a What the christ? The 12 I get. Got it. The colons? Not sure. I think it's just a dumb separator. Num is type! What the hell is a => a? I have no idea. In the top they have an example. primes = sieve[2..] where sieve (p:xs) = p : sie…

I wrote a page that tries to explain the syntax in a way that's appropriate for programmers (who don't need to be shown how the REPL can be used as a calculator and things like that): http://dv.devio.us/a-quick-look-at-haskell.html

Reading it right now, really great - thanks!

Re: The New Haskell Homepage

#135

Post by rcarmo »

Scores high on layout, not so much on usability (I, too, took a while to realize there was a live REPL on the page) or readability.

(I'm one of those people who tried to learn Haskell a couple of times but lacked use/time to really get to grips with it, so I can actually parse some of it, but the samples ought to be simpler.)

Re: The New Haskell Homepage

#136

Post by 72deluxe »

VMG wrote: post #111
forrestthewoods wrote: post #95

I get paid to write C++ code. I'm pretty good at it. I understand it's normal usage syntax very well. I don't fucking know what a god damn thing means in Haskell. λ 5 + 7 12 :: Num a => a What the christ? The 12 I get. Got it. The colons? Not sure. I think it's just a dumb separator. Num is type! What the hell is a => a? I have no idea. In the top they have an example. primes = sieve[2..] where sieve (p:xs) = p : sie…

> I understand it's normal usage syntax very well. You understand C++ syntax because you're familiar with it, not because it is "normal" in any way.

Very true, but helpfully many other languages have a similar syntax (C, Java, JavaScript, even PHP's OOP system looks like Java) so it is easy to move between them.

This looks very alien. Is there any language with a similar syntax?

Re: The New Haskell Homepage

#137

Post by 72deluxe »

It's pretty! BUT! I get the feeling that I am viewing websites through a post box slot. This seems to be the trend with currently fashionable sites, with the wall to wall slot appearance.

Re: The New Haskell Homepage

#138

Post by agumonkey »

forrestthewoods wrote: post #109
agumonkey wrote: post #107

Earlier quoted context omitted.

Being a god in C++ won't give you anything regarding foreign paradigms. Are you familiar with other FP languages such as ML, Miranda or even Lisp ? More than syntax it's the semantics that differs a lot. Laziness, Immutability...

Not really. No. And that's the problem! You're right that semantics are what make the languages truly different. However it is literally impossible to even begin to understand semantics if you don't know the syntax. That's what is so frustrating. It might as well be written in Kanji. That's how meaningless it is to me and, I believe, most programmers.

I know I've been through this in college. To each his own, but I believe Haskell is too much higher order logic for people to start with it. By having deeply strict principles (lazy, immutable, monad, curryfication,...) they managed to craft a language very tiny and very abstract, too abstract as a starter. These principles are very easy ones when they're explicit. I can be shown in scheme to an average coder with no issue.

Try to understand haskell (naive not in-place) quicksort http://www.haskell.org/haskellwiki/Introduction#Quicksort_in...

Re: The New Haskell Homepage

#140

Post by [deleted] »

PieSquared wrote: post #97
ufmace wrote: post #94

Well, it sure looks nicer, I'll give you that. I'm more interested in the content, though. I was just trying here and there over the last week or so to learn some Haskell - people always seem to be raving about how cool it is. I found my way to the CIS 194 class link, the first one on the page, and I find that it really isn't very good for learning. I went through the first page, trying to run some of the stuff. I fi…

You could try IHaskell[0] for playing around with Haskell. It is like GHCi, but provides a notebook interface where you can enter multiline expressions and do declarations, so it is a lot closer to real Haskell. (It can be a bit of a paint o install though.) Disclaimer: IHaskell author here :) [0] https://github.com/gibiansky/IHaskell

[deleted]
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