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I have list of instance B1,B2,....Bn and A1,A2,....An.
How can i replace B1 = A1, B2 = A2 ... Bn = An by using "search and replace" query
You mean the names of the new cells are constructed by replacing the "A" prefix by "B"?
Here is such a custom query:
with instances of cells * where cell_name ~ "A(*)" do inst.cell_index = <<"B"+$1>>
This may need some explanation:
"instances of cells *" is a bit misleading (owned to the pseudo-natural language of the query): it actually means "instances contained in all cells". So "with instances of cells *" is a loop over all instances of all cells.
"cell_name" is referring to the "cell_name" attribute of these instances, "~" is the match operator. It accepts a "glob pattern" (think shell) and "A(*)" will match all A-prefixed names. The remaining part is captured by the bracket. It will become available as "$1" in the subsequent expressions.
<<"B"+$1>> is a cell reference by name (name string expression inside double angle brackets) and resolves into a cell index which can be assigned to the instance's cell_index attribute.
Hope that's not too confusing
This is exactly what I want.
Your explanation is very clearly Matthias.