split,,-1 (Re: Blank File)

Specifying -1 as the third argument to split causes it to not discard trailing empty results, which is not the default behavior.

- tye (but my friends call me "Tye")

Comment on split,,-1 (Re: Blank File)

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Re: split,,-1 (Re: Blank File) by tadman (Prior) on Jan 26, 2001 at 00:01 UTC
True, but the presence or absence of '-1' as a paremeter as used in that program would have no effect, correct? If I understand the documentation correctly, the '-1' is important in very specific circumstances, such as using pop(): `my ($a) = "the\|sneaky\|camel\|\|"; my (@b, $nil); # Try different parameters with split and report for my $p (undef, -1) { @b = split (/\\|/, $a, $p); ($nil) = pop (@b); print "split() with '$p': '$nil' should be empty, ", (length($nil)?" but isn't":"and is"),".\n"; }` [download] You learn something new every day, it seems.	[reply] [d/l]

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Re: split,,-1 (Re: Blank File)
by tadman (Prior) on Jan 26, 2001 at 00:01 UTC

pop

     my ($a) = "the|sneaky|camel||";
     my (@b, $nil);

     # Try different parameters with split and report
     for my $p (undef, -1)
     {
          @b = split (/\|/, $a, $p);
          ($nil) = pop (@b);
          print "split() with '$p': '$nil' should be empty, ",
           (length($nil)?" but isn't":"and is"),".\n";
     }
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