Re: [Haskell-beginners] Conciseness question

I was just glancing through that chapter when I saw the phrase "Paamayim Nekudotayim." I was most certainly not expecting Hebrew phrases to pop up here. Has this phrase somehow made it into a larger circle without my knowing, or is there some explanation out there as to why it's used in LYAH? On Sun, Aug 7, 2011 at 4:10 PM, Thiago Negri wrote:

Hey Manfred.

Take a look at "Record Syntax" topic of the book "Learn you a Haskell for great good". It looks like what you want.

http://learnyouahaskell.com/making-our-own-types-and-typeclasses#record-synt...

Thiago.

2011/8/7 Manfred Lotz :

...

Hi all, In Lua I could do something like this:

-- initialize empty table P = {}

P.a = "bla1" P.b = "bla2"

and so on.

Now I can refer to each value by name, and I also can easily iterate over the table P.

How can I do something similar in Haskell. Note: I do want only write each variable one time (or two times if I count the type definition).

I thought about:

data P = P {     a :: String,     b :: String }

Then I have one definition

pval = P {   a = "bla1",   b = "bla2" }

Now I could refer to each val easily, e.g. a pval. However, I don't see that I could iterate over the members of pval.

It there a way to do what I want without defining a list like this? pls p = [ (a p), (b p)]

Perhaps a comletely different way?

-- Manfred

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