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Today's Topics:
1. Re: DB + CSV + Mail (David McBride)
2. Re: DB + CSV + Mail (Christopher Allen)
3. Re: Type constructors sharing a common field (Thomas Hallgren)
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Message: 1
Date: Tue, 29 Apr 2014 16:54:18 -0400
From: David McBride <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] DB + CSV + Mail
Message-ID:
<can+tr41suqdrqpwuftcdoe0pirdtgqn3j8x3ac79ogqzzid...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Use mysql-simple/postgresql-simple for database. Use cassava for csv, and
umm I know there is a library for mailing, but I don't recall what it is.
On Tue, Apr 29, 2014 at 2:50 PM, Ari King <[email protected]>wrote:
> Hi,
>
> I'd like to port a python script that queries a DB, writes the results to
> a CSV file, and emails that file. I'd appreciate suggestions on libraries
> and/or approaches that can help me achieve this.
>
> For DB querying I was thinking of using HDBC.
>
> Best,
> Ari
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
>
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Message: 2
Date: Tue, 29 Apr 2014 15:56:23 -0500
From: Christopher Allen <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] DB + CSV + Mail
Message-ID:
<cadnndorohoxsadqb8de1ewmfh+j7ct5xua_s_hfp+s5dnoy...@mail.gmail.com>
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https://hackage.haskell.org/package/smtp-mail
On Tue, Apr 29, 2014 at 3:54 PM, David McBride <[email protected]> wrote:
> Use mysql-simple/postgresql-simple for database. Use cassava for csv, and
> umm I know there is a library for mailing, but I don't recall what it is.
>
>
> On Tue, Apr 29, 2014 at 2:50 PM, Ari King <[email protected]>wrote:
>
>> Hi,
>>
>> I'd like to port a python script that queries a DB, writes the results to
>> a CSV file, and emails that file. I'd appreciate suggestions on libraries
>> and/or approaches that can help me achieve this.
>>
>> For DB querying I was thinking of using HDBC.
>>
>> Best,
>> Ari
>>
>> _______________________________________________
>> Beginners mailing list
>> [email protected]
>> http://www.haskell.org/mailman/listinfo/beginners
>>
>>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
>
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Message: 3
Date: Wed, 30 Apr 2014 11:02:44 +0100
From: Thomas Hallgren <[email protected]>
To: [email protected]
Subject: Re: [Haskell-beginners] Type constructors sharing a common
field
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1
Hi,
On 2014-04-28 19:26, Lorenzo Tabacchini wrote:
> Imagine the following data type:
>
> data Person = Child { childAge :: Int, school :: School }
> | Adult { adultAge :: Int, job :: Job }
>
> Both the alternatives share an "age" field, but in order to access it we are
> obliged to match all the constructors:
>
> personAge :: Person -> Int
> personAge (Child {childAge = age}) = age
> personAge (Adult {adultAge = age}) = age
> Is there a way to define a common field in a data type (somehow like
> inheritance in the OOP world)?
Yes, there is:
data Person = Child { personAge :: Int, school :: School }
| Adult { personAge :: Int, job :: Job }
No extension needed!
Thomas H
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