[fpc-pascal] how to expand a set?
wkitty42 at windstream.net
wkitty42 at windstream.net
Wed Jun 15 18:20:17 CEST 2016
On 06/15/2016 10:36 AM, Santiago A. wrote:
> El 15/06/2016 a las 15:55, wkitty42 at windstream.net escribiÃ³:
>>
>> what is the best/easiest way to increase the size of a set if the set
>> is defined as the following?
>>
>>
>> const
>> CMaxCount = 255;
>>
>> type
>> TMsgAreas = set of 0..CMaxCount;
>>
>> var
>> MsgAreas : TMsgAreas;
>>
>>
>> is a set of sets possible?
> No, the base type of a set must be an ordinal type. Enumeration type and
> integers. And the base type can't have more 255 elements
right... so a set has 0-255 elements and a set of sets would have 0-255 elements
containing one set of 0-255 elements... if all are used, that gives 0-65535
elements we can access... or should be able to access... if we can figure out
how to create it :(
>> how is a set of sets defined?
> No
hunh?
>> how are the elements in the sets accessed?
> ??
> What do you mean with "access"?
> You can't access the element of a set, you can say if the an element is
> in a set or not.
exactly... that's accessing it if it exists in the set...
> msgAreas:=[1..7];
>
> if (2 in msAreas) then .......
yup...
if (this.messages.area.num in UsersMsgTaggedAreas) then
begin
ScanForNewMessages(this.messages.area.num);
ScanForUserMessages(this.messages.area.num,this.user.name,this.user.nick);
end
else
inc(this.messages.area);
;)
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