September 2016
Intermediate to advanced
408 pages
9h 18m
English
Content preview from Haskell High Performance ProgrammingBecome 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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Erroring and handling exceptions
Haskell very intentionally does not have a null/None/nil value like many popular languages have, both strongly typed (Java) or not (Perl). Null values are exceptionally bad for program safety. Null values are not expressed in types, giving nulls no choice but to hide from the unsuspecting programmer and pop into sight in production.
Nulls are one of the main causes of bugs and security holes in today's software, which is why Haskell has opted for a no-null policy. This might sound restrictive at first, but actually the alternative representations for possibly failing computations in Haskell are various and rich.
First, there are infinite ways to embed the possibility of failing into the datatype: Maybe, Either, ...
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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.