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Re^2: Elegant way to split into sequences of identical chars?

by bioMan (Beadle)
on Nov 29, 2005 at 23:13 UTC ( #512796=note: print w/replies, xml ) Need Help??


in reply to Re: Elegant way to split into sequences of identical chars?
in thread Elegant way to split into sequences of identical chars?

I was fascinated by the use of the $| "output autoflush". I usually use '$| = 1;' or '++$|;' for the scripts I write on Windows. So I tried the same.

my $str = 'xx556xx'; my @x = grep --$|, $str =~ m/((.)\2*)/g; my @y = grep ++$|, $str =~ m/((.)\2*)/g; print join ',', @x; print "\n"; print join ',', @y;

The output being:

xx,55,6,xx

xx,x,55,5,6,6,xx,x

I was somewhat suprised as all the documentation I've seen for '$|' says a non-zero value will force fflush after every 'write' or 'print' statement. I assumed the behavior would be the same for positive and negative values. What gives?

Mike

Replies are listed 'Best First'.
Re^3: Elegant way to split into sequences of identical chars?
by QM (Parson) on Nov 30, 2005 at 02:46 UTC
    I've seen for '$|' says a non-zero value will force fflush after every 'write' or 'print' statement.
    For a better explanation, see the thread Perl Idioms Explained - $|++, especially where it talks about ++ and --.

    -QM
    --
    Quantum Mechanics: The dreams stuff is made of

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