Re^3: How to interpolate CONSTANTS in Here docs?

Anonymonk has explained the syntax; but I thought I'd add that I'm not keen on doing it that way. Personally I prefer:

#! perl -slw
use strict;

use constant {
    OUT_DIR      => 'out',
    OUT_FIELDSEP => '=',
    OUT_FILENAME => 'ks',
    OUT_SUFXSTOR => 'storable',
    VAL_MIN      => 15,
    VAL_MAX      => 3600,
};

printf <<USAGE, OUT_DIR, OUT_FILENAME, OUT_SUFXSTOR, OUT_FIELDSEP, VAL
+_MIN, VAL_MAX;

This program does this and that with the %s. The filename is
%s and the file suffix is %s.

Fields are separated with the %s character. Enter a value
between %s and %s.

USAGE
[download]

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". I'm with torvalds on this

In the absence of evidence, opinion is indistinguishable from prejudice. Agile (and TDD) debunked

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