[REBOL] Re: The all function.
From: ingo:2b1 at: 15-Apr-2002 10:40
Hi Louis,
Dr. Louis A. Turk wrote:
<...>
> What I am wanting to do is to make sure that the record is not already
> in the database before I insert it. In other words, no duplicate
> _records_ are allowed. Note, however, that although the records are
> all unique, the code data is not necessarily unique, nor is the chknum
> data. There may be many records with the same code, and also many
> records with the same chknum. Only the code / chknum combination is
> unique.
>
> So, do I perhaps need the records to look like this?:
>
> ] "bho" "5259" ; <===<<< TWO KEYS.
> make object! [
> code: "bho"
> chknum: "5259"
> date: 27-Jul-2001
> amount: $100.00
> special: $0.00
well, I think this would get you into much trouble, but how about using
a single key, that joins the two values?, e.g.
>> key: join join code "-" chknum
== "bho-5259"
and then use
] "bho-5259" ; <===<<< ONE KEY, composed of TWO KEYS.
make object! [
code: "bho"
chknum: "5259"
date: 27-Jul-2001
amount: $100.00
special: $0.00
I hope that helps,
Ingo
