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 Check existence of tree branch or node		  New Topic  Reply to Topic
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JokerOne

Germany
58 Posts
Posted - 03/04/2016 :  10:45:50 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. 9.1 and Service Release 1(Select Help-->About Origin):
Operating System: Win 7

Is there a LabTalk command available that can check if a certain tree node or tree branch exists?
e.g.

tree aaa;
aaa.bbb= 1
exist(aaa.bbb) [ = 4 expected, but results:24 ]
exist(aaa.ccc) [ = 0 expected, but results:24 ]
Edited by - JokerOne on 03/04/2016 10:57:24 AM

cpyang

USA
1406 Posts
Posted - 03/04/2016 :  10:46:05 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Looks like we have implemented this for internal use and never documented it. I debugged into it and found ORG-875 and it really work, so you are in luck with this one, see code below

tree aaa;
aaa.bbb= 1;
aaa.ccc= 2;
aaa.ddd= 3;

exist(aaa.anything,24)=;//this will only check the tree existed and no node checking
if(exist(aaa.anyjunk)==24) type "aaa is a tree";
aaa@=;//this should return 2 for a branch
aaa.bbb@=;//this should return 1 for a leaf
if(aaa.ccc@>0) type "aaa.ccc is valid tree node";
if(aaa.junk@==0) type "aaa.junk is not valid";
if(aaa@==2) type "aaa is a tree branch";
if(aaa.bbb@==1) type "aaa.bbb is a tree leaf";
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JokerOne

Germany
58 Posts
Posted - 03/07/2016 :  05:52:29 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thank you for your help. Exactly, what I was looking for.
Despite the fact, that I do not know what ORG-875 is, but nevermind.
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cpyang

USA
1406 Posts
Posted - 03/07/2016 :  12:30:37 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
ORG-875 is the tag that I put down for future references. It is the ID for our internal development database.

CP
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