Sasha Shpota :
Say we have a Customer class:
public class Customer {
private Car[] cars;
// getter, setter, constructor
}
and collection of customers which we need to map on cars.
Currently I'm doing it somehow like this:
Collection<Customer> customers = ...
customers.stream().flatMap(
customer -> Arrays.stream(customer.getCars())
)...
It works well, but the code doesn't look elegant. I'd really like to replace it with code that uses method references which usually looks more readable and more compact. But using a field of array type makes it hard.
Question: is there any way of enhancing the flatMap call so it will be more readable/compact/clear?
Eran :
You can split the flatMap call into two calls - map and flatMap - each receiving a method reference:
Collection<Customer> customers = ...
customers.stream()
.map(Customer::getCars)
.flatMap(Arrays::stream)...
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