Re: How to reset a variable for each file inside a while( <> ) loop?

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Re^2: How to reset a variable for each file inside a while( <> ) loop? by pat_mc (Pilgrim) on Jun 13, 2008 at 15:52 UTC
Thanks, toolic - this looks interesting indeed. Since I am not familiar with the `continue` structure, can you please explain what exactly it is doing in your code? Thanks again! Pat	[reply] [d/l]
Re^3: How to reset a variable for each file inside a while( <> ) loop? by toolic (Bishop) on Jun 13, 2008 at 16:31 UTC
I'm glad you asked because, as it turns out, continue is not even needed in this case. Here is the simplified code: `while (<>) { print "$.\n"; close ARGV if eof; }` [download] I never use `continue` either; I just copied the code snippet (and tested it!) from the eof documentation. But, that code also used a next statement, which I deleted since it was not needed for your purposes. I should have also deleted the `continue` statement. I Read The Free Manual, as I'm sure you also did, which explains the relationship between `continue` and `next`.	[reply] [d/l] [select]
Re^3: How to reset a variable for each file inside a while( <> ) loop? by ikegami (Patriarch) on Jun 13, 2008 at 18:12 UTC
The `continue` allows you to call `next` in the loop without skipping "`close ARGV if eof;`".	[reply] [d/l] [select]
Re^4: How to reset a variable for each file inside a while( <> ) loop? by pat_mc (Pilgrim) on Jun 15, 2008 at 19:32 UTC
Thanks to all who took the time to reply and contribute to the discussion from which I learnt a lot! Based on the comments made I'd like to summarise the - in my view most elegant - solution to my question here: `eof` permits to detect the end of file, `$ARGV` holds the name of the file currently read and `$.` holds the current line number in that file. I just tested the following code snippet and it does exactly what I was looking for: `while ( <> ) { print "Reading line $. in file $ARGV.\n"; $. = 0 if eof; }` [download] So, thanks again to all of you who contributed! Cheers - Pat	[reply] [d/l] [select]
Re^5: How to reset a variable for each file inside a while( <> ) loop? by pjotrik (Friar) on Jun 16, 2008 at 10:20 UTC
Re^3: How to reset a variable for each file inside a while( <> ) loop? by ikegami (Patriarch) on Jun 13, 2008 at 18:13 UTC
The `continue` allows you to call `next` in the loop without skipping "`close ARGV if eof;`".	[reply] [d/l] [select]