[Tutor] Aggregation vs Composition
alan.gauld at yahoo.co.uk
Mon Dec 11 17:29:14 EST 2017
On 11/12/17 00:40, boB Stepp wrote:
> I own this book, too. I'll insert the portions of the text that I
> believe the OP is referring to.
Thanks for the clarification Bob.
>>> composition is aggregation*
> On page 18 the author goes on to use a chess set as an example...
> He continues in the next paragraph:
> ... an aggregate relationship makes more sense. Also keep in mind
> that composition is aggregation; aggregation is simply a more general
> form of composition. Any composite relationship is also an aggregate
> relationship, but not vice versa."
That's true in Python, not so in other languages (eg C++)
> I think it is these last two sentences that are confusing the OP.
I think it probably is, it would confuse me too
the first time I saw them.
Author of the Learn to Program web site
Follow my photo-blog on Flickr at:
More information about the Tutor