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OpenEdge ABL API Reference

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OpenEdge.Core.Collections.IListIterator

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  • Last Updated: January 15, 2026
  • 1 minute read
    • OpenEdge
    • Version 12.8
    • Documentation
Namespace: OpenEdge.Core.Collections
Type: Interface IListIterator
Parent Classes:
Inherits: OpenEdge.Core.Collections.IIterator

Copyright (c) 2013 by Progress Software Corporation. All rights reserved.
File:IListIterator
Purpose:An iterator for lists that can traverse the list in
both directions
Author(s):hdaniels
Purpose: Returns the next elements' index.
Return integer The index of the next element



Method Summary
  Options Name Purpose
  LOGICAL HasPrevious () /** Indicates whether there's a previous element. @return logical True if there is a previous element */
  INTEGER NextIndex () /** Returns the next elements' index. Return integer The index of the next element */
  Progress.Lang.Object Previous () /** Returns the previous element @return Object */
  INTEGER PreviousIndex () /** Returns the index of the previous item. Return integer The index of the previous element */

Method Detail
Top

LOGICAL HasPrevious ()

Purpose: Indicates whether there's a previous element.
Returns LOGICAL
  logical True if there is a previous element
Top

INTEGER NextIndex ()

Purpose: Returns the next elements' index.
Return integer The index of the next element
Returns INTEGER
 
Top

Progress.Lang.Object Previous ()

Purpose: Returns the previous element
Returns Progress.Lang.Object
  Object
Top

INTEGER PreviousIndex ()

Purpose: Returns the index of the previous item.
Return integer The index of the previous element
Returns INTEGER
 


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