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Posted by Davιmon on 11/01/14 11:44
Toby Inkster arranged shapes to form:
> DavΓ©mon wrote:
>
>> Lists with no items? That doesn't make any sense to me at all!
>
> The mathematical equivalent for the UL element would be what is called a
> "set".
>
> A set is a group of numbers/shapes/letters/vectors/whatever. Some examples
> are the set of all positive integers, the set of letters that directly
> follow vowels in the alphabet, and the set of all people called Kevin.
>
> The set is an abstract concept, and can be dealt with mathematically, in
> many cases without worrying about how many (if any) elements it contains.
However, HTML is a language, and I don't think Language and Mathematics are
directly comparable.
For example, in maths, two negatives make a positive, wheras in language
(English at least) two negatives are just emphatically negative. "I don't
know nothing about it".
The other difference between the idea of a list and a set, is that lists
imply an order, even an unordered list <ul> still retains that quality.
Mathematically [set] that order isn't important, but in terms of language
[lists], the position of the object in realtion to the other objects
invariably is.
If you have either 1 thing, or 0 things, then they can't be sequentially
related to other things, so therefore not lists. I think... ?
--
DavΓ©mon
http://www.nightsoil.co.uk/
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