January 2020
Intermediate to advanced
532 pages
13h 31m
English
Content preview from Hands-On Design Patterns and Best Practices with Julia
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How do we fix this?
The acyclic dependency principle states that dependencies between packages must be a directed acyclic graph (DAG)—that is, the dependency graph must have no cycle. If we do see a cycle in the graph, then it is a sign of a design problem.
When we encounter such a problem, we must refactor the code so that the specific dependent function is moved to a separate package. In this example, suppose that there's some code in package A that is used by the package internally and also used by package E. This dependency is basically E -> A.
We can then take this code and move it to a new package F. After this change, packages A and E would both depend on package F, effectively removing the cyclic dependency:
After this refactoring, ...
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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.