Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

Re^2: The "<" in the grep block

by vagabonding electron (Chaplain)
on Sep 23, 2012 at 17:15 UTC ( #995218=note: print w/replies, xml ) Need Help??

in reply to Re: The "<" in the grep block
in thread The "<" in the grep block

This statement allows to use glob in cmd (Win32). Without this line the script if run as:
C:\perl\bin>perl N:/TEMP/*
throws the following message:
Use of uninitialized value in numeric lt (<) at line 8. N:/TMP/*
I have found this line by BrowserUK some time ago (cannot find the original node now) and I am very grateful for it.

Update: Did not see the post from BrowserUK before I sent my message.

Replies are listed 'Best First'.
Re^3: The "<" in the grep block
by 2teez (Priest) on Sep 23, 2012 at 18:17 UTC

    I agree that

    @ARGV = map{glob} @ARGV; ....
    does work, however, I think since "glob" can do the expansion, why not use
    my @smaller_than_1000 = grep { -s $_ < 1000 } glob("@ARGV"); ....
    see glob for detail.

    If you tell me, I'll forget.
    If you show me, I'll remember.
    if you involve me, I'll understand.
    --- Author unknown to me

      That works for this application, but wouldn't for the more common uses:

      BEGIN{ @ARGV = map glob, @ARGV } while( <> ) { ... }


      perl -eBEGIN{@ARGV=map{glob}@ARGV} -nle"1" a*.pl b*.pl

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.

      RIP Neil Armstrong

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://995218]
[LanX]: moritz, no ... jsut copy one line of my code
[moritz]: I'm still using the CB, because ambrus's #cbstream makes it bearable
[LanX]: ... the rest is loaded from a node
[holli]: the best course of action would be to transfer the data to something well tested. even if it isnt perl based
[moritz]: but even if I had all the time in the world, I wouldn't spend much on perlmonks
[LanX]: holli: LOL
[LanX]: moritz: why ? family?
[LanX]: or other language?
[moritz]: LanX because of usability issues, and the lack of evolvement
[holli]: lol to the robust charme or to the data transfer?

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (12)
As of 2017-11-20 19:21 GMT
Find Nodes?
    Voting Booth?
    In order to be able to say "I know Perl", you must have:

    Results (291 votes). Check out past polls.