Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Re: Parenthetical help

by jwkrahn (Monsignor)
on Apr 03, 2011 at 17:55 UTC ( #897224=note: print w/replies, xml ) Need Help??


in reply to Parenthetical help

BTW, all three are wrong as time always returns a scalar so using a list slice on it makes no sense.

Replies are listed 'Best First'.
Re^2: Parenthetical help
by eye (Chaplain) on Apr 04, 2011 at 04:59 UTC
    Good point. The code I posted was oversimplified to isolate the issue. The original code was getting the modify time of a file and looked more like:

    localtime((stat $file)[9])

      The problem is that localtime has a prototype and that prototype says that localtime's first argument, if present, must be a scalar value, so arrays and lists are converted to a scalar value so localtime can use it.

      $ perl -le'print prototype "CORE::localtime"' ;$

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://897224]
help
Chatterbox?
[jdporter]: one prog I have has a UI which allows to input a bit mask
[jdporter]: currently it expects the bitmask to be in the form of a hex number, e.g. 0x0101
[jdporter]: but I'd like to let the user specify it as individual bits, i.e. 0b0000000100000001
[jdporter]: there is no bit/binary equivalent of hex, right?
[jdporter]: I guess that the most direct way of doing it is with some magical incantation involving unpack or whatever
[jdporter]: let me google that for me ;-)
[jdporter]: hex points explicitly to oct, which does the job. :-D
[jdporter]: omg, I f love Perl!
[choroba]: say unpack 'H*', pack 'B*', $mask =~ /0b([01]+)/;

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (8)
As of 2018-02-20 16:30 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    When it is dark outside I am happiest to see ...














    Results (272 votes). Check out past polls.

    Notices?