causes avalon to ms-for traverse the array, but after modifying the value of the traversal array, the array data will be repeated, as shown in figure: 
 the first assignment, the list data is correct, the second assignment has a problem, there are duplicate columns, and the correct column data is not displayed, it has been updated to the latest avalon. 
 the data assignment also uses the built-in list.clear () list.pushArray () method 
 the first time is correct 
 
2 4  
 
