go ahead... be a heretic | |
PerlMonks |
Re^5: Effeciency of key-only hashby betterworld (Curate) |
on Aug 24, 2008 at 22:34 UTC ( [id://706594]=note: print w/replies, xml ) | Need Help?? |
you can shave off two characters by omitting the parentheses. If you want to omit characters, you can write
Update: I'm sorry, I should have tested this code... thanks to lodin, see below. (Not to mention the whitespace... but often some more characters make the code more readable.) I find it quite natural that map uses list context and grep uses scalar context. grep's block evaluates to a boolean value (whether or not to include the element), which is a scalar. map's block evaluates to... well, a list. If this were not the case, the parentheses would not help. One remark about this "map" solution: Note that this works only once. If you use the hash-slice solution, you can add something to the set several times.
In Section
Seekers of Perl Wisdom
|
|