On Jul 2, 2007, at 2:46 PM, Gabriel Striewe wrote:
Dear List,
I wanted to interpolate a function reference in a here doc.
The following works fine:
my $hello = sub {
return "hello world!";
};
printf "hello $s\n", &$hello();
In Perl printf is rarely used because double-quote strings allow
interpolation of scalars and arrays, and because print accepts an
arbitrary number of arguments.
Interpolation does not understand function calls, though, so you
either use a multi-argument call like this:
print "hello ", $hello->(), "\n";
or either use this hack:
print "hello @{[ $hello->() ]}\n";
Here-documents have double-quote semantics unless you put single
quotes around the terminating string, so that last trick works in
here-documents as well.
-- fxn
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