Is there a language where collections can be used as objects without altering the behavior?

As an example, first, imagine those functions work:

function capitalize(str) 
    //suppose this *modifies* a string object capitalizing it
function greet(person):
    print("Hello, " + person)

capitalize("pedro")
>> "Pedro"

greet("Pedro")
>> "Hello, Pedro"

Now, suppose we define a standard collection with some strings:

people = ["ed","steve","john"]

Then, this will call toUpper() on each object on that list

people.toUpper() 
>> ["Ed","Steve","John"]

And this will call greet once for EACH people on the list, instead of sending the list as argument

greet(people)
>> "Hello, Ed"
>> "Hello, Steve"
>> "Hello, John"