| 1 |
Note $| or $OUTPUT_AUTOFLUSH which if nonzero forces a flush after every write or print on current output channel. Default is 0.
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| 2 |
Note $: or $FORMAT_LINE_BREAK_CHARACTERS which is set of characters on which to break when processing filled continuation lines (Carat ^ format)
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default is "\s\n-" to break on whitespace, newline or hyphen
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| 3 |
Related is $/ or $INPUT_RECORD_SEPARATOR or $RS (defaulted to newline) which is very useful when processing HTML where newlines are irrelevant and you set $/ to say < or > to scan to next tag or end of tag and ignore newlines
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This is valid in conventional <FILEHANDLE> syntax
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| 4 |
$^A or $ACCUMULATOR is an accumulator which holds results of write command. This is emptied after write finishes a format but you can access directly through formline() function defined in PERLFUNC and PERLFORM manpages.
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syntax is formline (PICTURELINE,LIST);
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which takes LIST of variables and outputs according to PICTURELINE
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