July 2023
Intermediate to advanced
276 pages
6h 55m
English
Content preview from Functional Programming in Java, 2nd EditionBecome 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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Creating a Safety Net for Refactoring
Refactoring should make the internals of code better without affecting its external behavior. We’re often eager to reap the benefits of refactoring but have to be mindful of the risks as well. It’s reasonable to worry about the code behaving differently after the change. Due to the hidden complexity in the code, it’s possible that we haven’t fully understood the code we set out to change. Irrespective of how charming the functional style code may look, it’s no good if it doesn’t produce the same results as the imperative style code it’s replacing. Automated tests serve as a safety net for refactoring.
Once we have passing tests, with each change we can quickly verify that the code that worked before continues ...
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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.
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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.