F5 Sites
  • F5.com
  • F5 Labs
  • MyF5
  • NGINX
  • Partner Central
  • Education Services Portal (ESP)
Contact
  • Under Attack?
  • F5 Support
  • DevCentral Support
  • F5 Sales
  • NGINX Sales
  • F5 Professional Services
Skip to contentBrand Logo
Forums
CrowdSRC
Articles
GroupsEventsSuggestionsHow Do I...?
RegisterSign In
  1. DevCentral
  2. Articles
  3. Technical Articles

iControl 101 - #13 - Data Groups

Data Groups can be useful when writing iRules.  A data group is simply a group of related elements, such as a set of IP addresses, URI paths, or document extensions. When used in conjuction with the ...
Published May 01, 2008
Version 1.0
101
application delivery
automation
basic
BIG-IP
dev
devops
events
getting started
iControl
Joe_Pruitt's avatar
Joe_Pruitt
Joined September 22, 2004
View Profile
Mark_Domansky's avatar
Mark_Domansky
Icon for Nimbostratus rankNimbostratus
Feb 01, 2012
This notation is very confusing:

 

$Class.get_string_class((,"img_extensions"))

 

 

What is seems you are trying to convey here is that get_string_class is expecting an array. It doesn't require an array, but will accept it. However arrays in PowerShell are denoted with the @ symbol. So these work and are generally less confusing:

 

$Class.get_string_class("img_extensions")

 

$class.get_string_class(@("img_extensions","another_class"))

Help guide the future of your DevCentral Community!

What tools do you use to collaborate? (1min - anonymous)

ABOUT DEVCENTRAL

DevCentral NewsTechnical ForumTechnical ArticlesTechnical CrowdSRCCommunity GuidelinesDevCentral EULAGet a Developer Lab LicenseBecome a DevCentral MVP

RESOURCES

Product DocumentationWhite PapersGlossaryCustomer StoriesWebinarsFree Online CoursesTraining & Certification

SUPPORT

Manage SubscriptionsProfessional ServicesCreate a Service RequestSoftware DownloadsSupport Portal

PARTNERS

Find a Reseller PartnerTechnology AlliancesBecome an F5 PartnerLogin to Partner Central

©2026 F5, Inc. All rights reserved.
TrademarksPoliciesPrivacyCalifornia PrivacyDo Not Sell My Personal Information