Example:
var arr = ['coucou','b','c'];
print(arr[0] + " " + (arr instanceof Array));
var remoteArray = loadWithNewGlobal({ name: "new_scope.js",
    script: "print(arguments[0][0] + ' ' + (arguments[0] instanceof Array)); var x = ['kiki']; x"}, arr);
print(remoteArray[0] + " " + (remoteArray instanceof Array));