IT SOLUTIONS
Your full service technology partner! 
-Collapse +Expand
Prism
Search Prism Group:

Advanced
-Collapse +Expand Prism To/From
To/FromCODEGuides
-Collapse +Expand Prism Study Test
PRESTWOODCERTIFIED
-Collapse +Expand Prism Store
PRESTWOODSTORE

Prestwood eMagazine

May Edition
Subscribe now! It's Free!
Enter your email:

   ► KBProgrammingDelphi Prism   Print This     
Next Random Article Next Random Tidbit || Change Topic Random From All

Random Tidbit

Part of the mo. lesson in the Nov 15 Issue of Prestwood eMag
Prism Code Snippet:
 A flashcard from our Prism Flashcards Library
 A code snippet from our Prism Code Snippets Page
Delphi Prism Empty String Check (length)

In Prism, a string can be nil (unassigned), assigned an empty string (""), or assigned a value.  Therefore, to check if a string is empty, you have to check against both nil and (""). Alternatively, you can check the length of the string or use String.IsNullOrEmpty.


var s: String; 
 
if (s = nil) or (s = '') then
  MessageBox.Show("empty string");

or use length:

if length(s) = 0 then
  MessageBox.Show("empty string");
Switch to longer article version of Delphi Prism Empty String Check (length) (Delphi Prism)

More Info


Comments

0 Comments.
Share a thought or comment...
 
Write a Comment...
...
Sign in...

If you are a member, Sign In. Or, you can Create a Free account now.


Anonymous Post (text-only, no HTML):

Enter your name and security key.

Your Name:
Security key = P1287A1
Enter key:
Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

Visit Profile

 KB Article #102037 Counter
16541
Since 9/16/2009
Go ahead!   Use Us! Call: 916-726-5675  Or visit our new sales site: 
www.prestwood.com


©1995-2022 Prestwood IT Solutions.   [Security & Privacy]