Lua Methods Reference > LuaField Methods > copyFieldNoOverwrite

The copyFieldNoOverwrite method copies the sub field to another sub field but does not overwrite the destination. After this operation the destination field contains all the values of the source field as well as any values it already had.
copyFieldNoOverwrite( from, to [, case])
(boolean) A boolean that specifies whether the from argument is case sensitive. The argument is case sensitive by default (true).