Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

Re^4: <> oddity ?

by Krambambuli (Curate)
on Mar 27, 2013 at 12:18 UTC ( #1025694=note: print w/replies, xml ) Need Help??

in reply to Re^3: <> oddity ?
in thread <> oddity ?

Just to clarify:

wishing to deal with various use modes in a perfectly similar manner, I wanted to have 3 distinct modes of calling the program behaving absolutely similar, with minimum fuss about that in the code:

$ sample.txt sample1.txt ... sampleN.txt
$ <sample.txt
$ cat sample.txt sample1.txt ... sampleN.txt |

All is well with this with the use of <>, except the fact that once EOF is seen, no further attempt to read from <> is allowed - or STDIN is opened, and will wait forever if you're unaware of it...

Thanks you helping to sort this out.

UPDATE As perlop says in 'I/O Operators':

The <> symbol will return "undef" for end-of-file only once. If you call it again after this, it will assume you are processing another @ARGV list, and if you haven't set @ARGV, will read input from STDIN.

Now I know :)

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1025694]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (4)
As of 2016-10-23 09:10 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (300 votes). Check out past polls.