February 2013
Intermediate to advanced
656 pages
21h 26m
English
Content preview from Implementing Domain-Driven DesignBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Conceptual Whole
A Value Object may possess just one, a few, or a number of individual attributes, each of which is related to the others. Each attribute contributes an important part to a whole that collectively the attributes describe. Taken apart from the others, each of the attributes fails to provide a cohesive meaning. Only together do all the attributes form the complete intended measure or description. This is different from merely grouping a set of attributes together in an object. The grouping itself accomplishes little if the whole fails to adequately describe another thing in the model.
As Ward Cunningham illustrates in his Whole Value pattern3 [Cunningham, Whole Value aka Value Object], the Value {50,000,000 dollars} has two attributes: ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.