Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

Re^4: help with error 'readline() on unopened filehandle'

by bhargavkanakiya (Initiate)
on Feb 03, 2013 at 08:10 UTC ( #1016800=note: print w/ replies, xml ) Need Help??


in reply to Re^3: help with error 'readline() on unopened filehandle'
in thread help with error 'readline() on unopened filehandle'

i understood that and updated the code as

... open my $MYFILE , "<$filename" || "Can't open the output file!"; ...

then the error changed to 'readline() on closed filehandle $MYFILE' even though i have not closed the file. this is the first code that i've written using perl and i am completely new to it. any help is appreciated. thanks.


Comment on Re^4: help with error 'readline() on unopened filehandle'
Download Code
Re^5: help with error 'readline() on unopened filehandle'
by Anonymous Monk on Feb 03, 2013 at 08:19 UTC
    Don't put a '$' on your file handle. Here's how you open and read from a file:
    $ cat file.txt line one line two line three $ cat open_and_read.pl #!/usr/bin/perl -w use strict; # usually one does not put a $ on a filehandle variable open ( MYFILE, "<file.txt" ) or die "could not be opening the file now + :$!\n"; while ( my $line = <MYFILE> ) { print $line; } close ( MYFILE ); $ ./open_and_read.pl line one line two line three
        Well EXCUSE ME!!!!!! Back in my day sonny we didn't put '$' on our filehandle variables and LIKE IT! If you are going in for new fangled paradigms you might as well code in ruby >:(
        that's my advice for you ... read a ruby tut. get a hair cut and a JOB!
      Also, 3 argument open is safer than 2 argument open -- sure you hardcoded the filename, but the OP hasn't
Re^5: help with error 'readline() on unopened filehandle' (precedence, or not ||)
by Anonymous Monk on Feb 03, 2013 at 08:21 UTC

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1016800]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (19)
As of 2014-09-02 14:43 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My favorite cookbook is:










    Results (25 votes), past polls