Groovy provides us with a slick way to iterate over objects in a collection to collet specific attributes. This is called the Spread operator ("*.")

For example:

class Person{
     String name;
     int age;
}

Say we have a collection of people:

def people =  []

//parameter maps are for another day
people.add(new Person(name: 'Dave', age: '24'))
people.add(new Person(name: 'Ann', age: '22'))
people.add(new Person(name: 'Steve', age: '45'))

Now, I want to get a list of only the names:

println(people*.name)

The output would be:

['Dave', 'Ann', 'Steve']

Keep it Groovy,
Luckless