MetaEdit+ - Accessing properties of subobjects

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Accessing properties of subobjects

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Forum Name: MetaEdit+
Forum Description: All topics relating to MetaEdit+ or DSM
URL: https://www.metacase.com/forums/forum_posts.asp?TID=398
Printed Date: 27.Mar.2026 at 00:26
Software Version: Web Wiz Forums 12.05 - http://www.webwizforums.com

Topic: Accessing properties of subobjects

Posted By: Tahir
Subject: Accessing properties of subobjects
Date Posted: 02.Mar.2012 at 18:34

Hello again!

How do we access properties of sub- and subsub ojects using MERL? The following is my scenario.

I have a graph with an object named Obj1. Obj1 has a property named Prop1.

The datatype for Prop1 is another object named Obj2.

The Obj2 in turn have a property named Prop2.

Prop2 has a data type of a Number.

I want to check the value of Prop2 when writing a generator for the graph with Obj1.

Best Regards
/Tahir

Replies:

Posted By: stevek
Date Posted: 02.Mar.2012 at 19:06

You can iterate over the object or objects in a property with do or dowhile. E.g. to go through all Obj1s and list the value of their Prop1 object's Prop2:

foreach .Obj1

{ do :Prop1

{ :Prop2

}

newline

}

If Prop1 doesn't contain any object, then "do :Prop1 {}" will do nothing.

For more details, please see the Workbench manual's chapter on MERL, http://www.metacase.com/support/45/manuals/mwb/Mw-5_3_4.html - 5.3.4 Control and navigation commands , 'Do loop'.