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From: Robert Hicks on 13 Apr 2010 14:51 This is just a "like to know" question. Does: use feature "switch"; incur anything more or less than: use feature ":5.10"; # which gives you switch and everything else Is it good practice just to pull in what you want with the first one? Bob
From: Ben Morrow on 13 Apr 2010 15:56 Quoth Robert Hicks <sigzero(a)gmail.com>: > This is just a "like to know" question. > > Does: > > use feature "switch"; > > incur anything more or less than: > > use feature ":5.10"; # which gives you switch and everything > else Well, yes. use feature ":5.10"; is equivalent to use feature qw/switch say state/; so you get 'say' and 'state' keywords as well as 'given' and 'when'. > Is it good practice just to pull in what you want with the first one? IMHO best practice would be use 5.010; at the top of any file using these features, but note the 'would be' rather than 'is' since 'feature' as a whole is fairly new and it's not necessarily clear yet if there are any significant gotchas. Ben
From: Robert Hicks on 13 Apr 2010 18:39 On Apr 13, 3:56 pm, Ben Morrow <b...(a)morrow.me.uk> wrote: > Quoth Robert Hicks <sigz...(a)gmail.com>: > > > This is just a "like to know" question. > > > Does: > > > use feature "switch"; > > > incur anything more or less than: > > > use feature ":5.10"; # which gives you switch and everything > > else > > Well, yes. > > use feature ":5.10"; > > is equivalent to > > use feature qw/switch say state/; > > so you get 'say' and 'state' keywords as well as 'given' and 'when'. > > > Is it good practice just to pull in what you want with the first one? > > IMHO best practice would be > > use 5.010; > > at the top of any file using these features, but note the 'would be' > rather than 'is' since 'feature' as a whole is fairly new and it's not > necessarily clear yet if there are any significant gotchas. > > Ben Thanks for your answer Ben. Bob
From: Ted Zlatanov on 14 Apr 2010 10:08
On Tue, 13 Apr 2010 20:56:15 +0100 Ben Morrow <ben(a)morrow.me.uk> wrote: BM> IMHO best practice would be BM> use 5.010; BM> at the top of any file using these features, but note the 'would be' BM> rather than 'is' since 'feature' as a whole is fairly new and it's not BM> necessarily clear yet if there are any significant gotchas. I like to use Modern::Perl. It does that plus a few other nice features: For now, this only enables the strict and warnings pragmas, as well as all of the features available in Perl 5.10. It also enables C3 method resolution order; see "perldoc mro" for an explanation. In the future, it will include additional CPAN modules which have proven useful and stable. Ted |