Question on "Group by Expression" and "Group Expression"

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HI Everybody,

Newbie here, started learning Houdini while learning UE4. About 1 week into it. Mainly learning through videos from youtube. Now I come across a problem:

During one video tutorial, the tutor showed a ‘group’ node which contain the option of “group by expression”, where you could specify an expression, and the node will ‘group’ any objects that contains the expression. However, as I am using the latest version 17, the ‘group’ node is quite different from what was showing during the video tutorial. As I tried to invoke the ‘group expression’ node, it is quite different from the video and I have got no idea what I should do from here.
Here is what I would like to ask you veterans and gurus and masters:
What is the “Group by Expression” equivalent node, which is used in the older version of houdini, is in the latest version of Houdini (in my case, houdini 17) ?

Thank you very much for your answer(s)!!!
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currently you'd use Group By Expression node for that or Attribute Wrangle
both use VEX to define the group, while the old Group node used hscript expressions for that

you can see some example VEXpressions in Group By Expression's dropdown menu

to get the old Group node that has Expression mode you can do this:
let's say your geo node is /obj/geo1
then in Textport type:
cd /obj/geo1
opadd group
that will create the old, deprecated Group node that is used in the tutorial
Tomas Slancik
FX Supervisor
Method Studios, NY
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Thank you very much Tomas. Sorry for taking so long to reply as i'm behind the great wall here in china
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