?
Solved

array, init, qw - how to include empty string

Posted on 2003-11-16
4
Medium Priority
?
893 Views
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.

Thanks
0
Comment
Question by:hank1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 18

Accepted Solution

by:
kandura earned 200 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) );
0
 
LVL 2

Expert Comment

by:ext2
ID: 9775300
You might be able to make use of this:

  @a = map {$_ eq '""' ? undef : $_} qw(password1 password2 "" hotchina);
0
 

Expert Comment

by:kerharo
ID: 9776291
This gives an "undef" rather than an empty string, use:
@a = map {$_ eq '""' ? "" : $_} qw(password1 password2 "" hotchina);
HTH
0
 
LVL 2

Expert Comment

by:ext2
ID: 9776309
yup.
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Email validation in proper way is  very important validation required in any web pages. This code is self explainable except that Regular Expression which I used for pattern matching. I originally published as a thread on my website : http://www…
There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question