[Haskell-beginners] Can fields in a record be optional?

[David Place]

On Jul 20, 2011, at 8:07 AM, Mats Rauhala wrote:

> On 18:18 Sun 17 Jul     , David Place wrote:
>> The way I often do this is to create an "ur" instance where all the fields have default values.  Then to create an instance, I just do a "record update" of this instance.  For example:
>> 
>> urContract = Contract { currency = undefined, payments = undefined, contracts = [] }
> 
> Out of curiosity, what's the etymology for your 'ur'?

A prefix denoting the earliest or original form of something.

> 
> -- 
> Mats Rauhala
> MasseR
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