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Postings from February 2013
* Ruslan Zakirov <ruz@bestpractical.com> [2013-02-20 13:35]:
> grep is a special function with (&@) prototype
Only very notionally, not in any way in terms of how it really works.
> but this prototype doesn't describe it completly. It doesn't tell
> where to lookup $_ (and probably other variables) within the code
> block binded to & in the protototype.
The block in a `grep` is simply not a function. Consider what this does:
sub foo { grep { return; 1 } 1..4 }
Then consider what this does:
use List::Util 'reduce';
sub foo { reduce { return; 1 } 1..4 }
(That difference is one of a number of reasons that Rafaël is wrong
in his response to me that such lightweight blocks would be useless
without lexical $_.)
--
Aristotle Pagaltzis // <http://plasmasturm.org/>
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