Re: Hash versus chain of elsifs

Just use a hash is my routine advice - both for clarity and performance. See also Perl Best Practices (Chapter 6) (O'Reilly) (or Perl Best Practices (squirrel pdf)):

6.16 Value Switches - Use table look-up in preference to cascaded equality tests (item 78)

If performance is critical, you could always benchmark different approaches - see Fastest way to lookup a point in a set for a simple example of this.

Comment on Re: Hash versus chain of elsifs

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Re^2: Hash versus chain of elsifs by mldvx4 (Hermit) on Nov 22, 2021 at 11:37 UTC
The squirrel PDF of best practices you point to is quite interesting. Some I already practice, some are new, others I need more clarification on. Is there a page with more detail on some of the enumerated items, maybe with simple examples for some of them?	[reply]
Re^3: Hash versus chain of elsifs by eyepopslikeamosquito (Archbishop) on Nov 22, 2021 at 12:03 UTC
You're meant to buy the book Perl Best Practices from O'Reilly ... though you could try clicking on "Start your free trial". It's considered unethical to search the internet for free pirated PDFs. :) TheDamian is a brilliant writer and it's a fantastic book IMHO - where it was described by Yanick as "worth it's weight in depleted uranium bars, and twice as entertaining".	[reply]
Re^4: Hash versus chain of elsifs by mldvx4 (Hermit) on Nov 22, 2021 at 13:43 UTC
Thanks. It was not clear that it is part of a book. I'll try to find if there is a bookstore that is not yet part of Amazon. :/ Perl Best Practices. Damian Conway. O'Reilly Media, Inc. ISBN: 9780596001735	[reply]