:sig
StringList map(StringList items, function<String (String)> f)
vector<R> map(vector<T> items, function<R (T)> f)

:params
items : list of items to transform
f : a function that returns the transformed value for each item
return value : a new list containing the transformed values

:see
>string
filter
0_StringList
0_DValue

:content
Returns a new list by calling `f` for each item in `items`.


Use `filter()` when you want to keep only matching items, and `map()` when you want to transform each item.


:example
StringList names = split("ada,grace", ",");
StringList upper = map(names, [](String item) { return(to_upper(item)); });
print(join(upper, ","), "\n");