Insert object it to different groups

Solar2D General Questions/Discussion
#1

Can i insert the same object in to different groups ?
Here is the sample code…

 local tmpWords = display.newGroup()  
  
 local drawWords = function( word )  
 local i = 0  
 local wordGroup = display.newGroup()  
 for letter in word:gmatch('.') do  
 i = i + 1  
 local letterPath = "Images/Letters/" .. letter .. "\_1.png"   
 letter = display.newImage( letterPath )  
 letter:scale(0.6,0.6)  
 letter.x = initX + xOffset \* i  
 letter.y = initY  
 tmpWords:insert( letter )  
 wordGroup:insert( letter )   
 end  
 wordGroup:addEventListener( "touch", onTouch )  
 i = 0  
 print("tmp::"..tmpWords.numChildren)  
 end

print(“tmp::”…tmpWords.numChildren) -> prints 0… why ?
Thanks. [import]uid: 14440 topic_id: 8299 reply_id: 308299[/import]

#2

It took me awhile to notice that a display object can reside in only one display group. If you insert into groupA it’s there – then if you insert into groupB, no error or warning… but that display object is now in groupB.
.

(it’s mentioned in the docs in the group:insert() section, but easy to miss)
[import]uid: 34130 topic_id: 8299 reply_id: 29724[/import]