Shift all elements of an array field to another array field throughout the whole collection

[steevej (Steeve Juneau)]

What have you tried so far?

What are the issues you faced?

Real documents would be better because we cannot cut-n-paste documents like

@Abhijit_Hota

"array" : [
    ObjectId("..."),
    ObjectId("..."),
    ObjectId("...),
    ObjectId("...")
],
"anotherArray" : [ ],

in our environment because the object ids are wrong.