Re: [Haskell-beginners] pattern matching on a common element

On Thu, 24 Nov 2016 23:09:26 -0800 Jeffrey Brown wrote:

You still can! Using Rahul's solution, that is.

but wouldn't i have to write A1 {name="a1", d="2.0} A2 {name="a2", i=2} etc... ? That would be ok for these simple examples, but for my actual code the field names would not be just 1 or 2 characters. Brian

On Thu, Nov 24, 2016 at 11:08 PM, wrote:

...

On Fri, 25 Nov 2016 12:06:06 +0530 Rahul Muttineni wrote:

...

data X = A1 { name :: String, d :: Double} | A2 { name :: String, i :: Int} | A3 { name :: String, d1 :: Double, i1 :: Int}

Now you can use `name` directly to get the string component of the different variants.

Hope that helps!

oops, i forgot to mention.

i'd like to be able to write my code;

x = [ A1 "a1" 2.0, A2 "a2" 3 ]

etc... to save myself a lot of typing.

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