[Haskell-beginners] searching for an element from a list of tuples

[Anvika Kumar]

Let me review and get back. Thank you.

Anvika
Graduate Student
STONY BROOK UNIVERSITY

On Mon, May 9, 2016 at 6:25 PM, Sumit Sahrawat, Maths & Computing, IIT
(BHU) <sumit.sahrawat.apm13 at iitbhu.ac.in> wrote:

> Try pattern matching on the list head and tail as in (x:xs). Take a look
> at the source code for filter [1], which can be put to use here.
>
> [1]:
> http://hackage.haskell.org/package/base-4.8.2.0/docs/src/GHC.List.html#filter
>
> Regards,
>   Sumit
> On 09-May-2016 9:41 am, "Anvika Kumar" <anvikakumar93 at gmail.com> wrote:
>
>> I have a tuple with three values and i want to remove the tuple which
>> contains a particular name.
>>
>> So d = (name, month, date)
>>  i take a user input of name and then search the list which has tuples of
>> the above declared type. Which ever tuple has the name it should be deleted
>> from the list.
>>
>> d is the tuple.
>> db should be a list of tuples.
>>
>>
>> remove :: (Eq) =>  IO String  -> d
>> print "Enter the name to be removed”
>> a <- getLine
>>       remove x [] = []
>>       print “Record not found”
>>       remove x db =
>>          if x ==
>>
>>
>>
>> Please let me know!
>>
>> Thanks a lot
>>
>>
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>> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>>
>>
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