On Jan 11, 2008 3:03 PM, ciwei <[EMAIL PROTECTED]> wrote:
> Question from a newbie: how to properly use space
> when reference to variables, array, hash etc.
Don't put any spaces inside a variable name, especially when interpolating it.
> print "first line : $user => @{$ttys {$user}} \n";
> print "second line: $user => @ {$ttys { $user}} \n";
> print "third line: $user => @{$ttys{$user}} \n";
Because of the spaces, the first two use $ttys (a scalar) while the
third uses %ttys (a hash). Although Perl is willing to silently ignore
some whitespace within a variable in ordinary code, quoted whitespace
is significant.
Hope this helps!
--Tom Phoenix
Stonehenge Perl Training
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