Re^3: Syntax Question Related to "join" on a Complex Data Structure

[haukex]

Hi perldigious,

What slightly surprised me is that the 3rd line above (with the leading %) gives the key value pairs and not just the values

Key/Value Hash Slices were added in Perl v5.20 (the rest of the Slices doc is probably worth a read too).

Hope this helps,
-- Hauke D

[BrowserUk]

Key/Value Hash Slices were added in Perl v5.20 (the rest of the Slices doc is probably worth a read too).

Thanks for mentioning that here; as to my knowledge that is the first time it has been.

It had gone completely under my radar; and -- along with the index/value array slices -- looks to be a really useful addition.

IMO that is probably the most useful addition since they added defined-OR back in 5.10.

[perldigious]

...along with the index/value array slices -- looks to be a really useful addition.

I agree with that sentiment. When you had me go back and look at the index/value array slice as well my brain started pondering on all the code I've written in the past year that I could have written to exploit that and $virtue_of_laziness++.

[perldigious]

Thanks haukex, appreciate the links to the perldata doc. I usually can only get where I need to be in the docs via a Google search. Everything I know about slices I picked up from the last chapter of "Learning Perl 6th Edition", which only briefly points out that it can be done on arrays and hashes and the basics of how to do it. I'm pretty sure that's where I picked up the @gimme_this_slice_of_values{ @for_this_list_of_keys } trick. It's not like they could dive too deep in to usage on more complex data structures that would require dereferencing, and since they wrote that book under Perl 5.14 the Key/Value Hash Slice variation wasn't covered.