Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

Re^4: Perl oddities

by Anonymous Monk
on Mar 01, 2005 at 16:16 UTC ( #435504=note: print w/ replies, xml ) Need Help??


in reply to Re^3: Perl oddities
in thread Perl oddities

No, you don't need the +:

print map {"$_",}, qw/foo bar/
works as well, although you need more characters. I don't think there is any case in Perl where you need unary minus for disambiguation where you can't disambiguate in another way using 2 or 3 other keystrokes.

Unary plus is just a convenience, not a requirement.


Comment on Re^4: Perl oddities
Download Code
Re^5: Perl oddities
by hardburn (Abbot) on Mar 01, 2005 at 16:18 UTC

    Quoting is not an identity function in Perl.

    "There is no shame in being self-taught, only in not trying to learn in the first place." -- Atrus, Myst: The Book of D'ni.

      Quoting is not an identity function in Perl.

      It's not, but if you're going to use them as hash keys, they get quoted anyway:

      perl -MDevel::Peek -e '$a = 1; Dump ($a); %a = map +{$_}, $a; Dump ($a +)' SV = IV(0x8192edc) at 0x8191dc4 REFCNT = 1 FLAGS = (IOK,pIOK) IV = 1 SV = PVIV(0x8184888) at 0x8191dc4 REFCNT = 1 FLAGS = (IOK,POK,pIOK,pPOK) IV = 1 PV = 0x818b5b8 "1"\0 CUR = 1 LEN = 2

      perl -MDevel::Peek -e '$a = 1; Dump ($a); %a = map {"$_",}, $a; Dump ( +$a)' SV = IV(0x8192edc) at 0x8191dc4 REFCNT = 1 FLAGS = (IOK,pIOK) IV = 1 SV = PVIV(0x8184888) at 0x8191dc4 REFCNT = 1 FLAGS = (IOK,POK,pIOK,pPOK) IV = 1 PV = 0x818b5b8 "1"\0 CUR = 1 LEN = 2
      No difference.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://435504]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (5)
As of 2015-07-04 15:49 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (60 votes), past polls