array, init, qw - how to include empty string

Posted on 2003-11-16
Last Modified: 2008-03-06

How to do initialize an array with an empty string with qw?  Can you do it with qw?

@a = qw(password1 password2 "" hotchina);

I want the 3rd value to be an empty string - no password - but
it expands as the two quotes.

@a = ("this", "that", "", "andthis");  works just find.

Just curious.

Question by:hank1
  • 2
LVL 18

Accepted Solution

kandura earned 50 total points
ID: 9760154
No, you can't do that.
qw is more or less the same as split ' ', q( STRING ) , except that your array is created at compile time.
As in the split, it is not possible to get empty strings.

You could use @a = ( qw(password1 password2), '', qw(hotchina) );

Expert Comment

ID: 9775300
You might be able to make use of this:

  @a = map {$_ eq '""' ? undef : $_} qw(password1 password2 "" hotchina);

Expert Comment

ID: 9776291
This gives an "undef" rather than an empty string, use:
@a = map {$_ eq '""' ? "" : $_} qw(password1 password2 "" hotchina);

Expert Comment

ID: 9776309

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