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class Animal: | |
def __init__(self, name, age): | |
self.name = name | |
self.age = age | |
def __repr__(self): | |
return self.name | |
animals = [ | |
Animal("t-rex", 3e6), | |
Animal("dog", 5), | |
Animal("cat", 6), | |
Animal("ostrichhhhhhhhh", 16), | |
] | |
def minus_these_two(a1, a2): | |
return a1.age - a2.age | |
def sort_by_this(animal): | |
return animal.age | |
animals.sort(key=sort_by_this) | |
print animals |
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import java.util.*; | |
class Animal { // implements Comparable<Animal> { | |
public String name; | |
public int age; | |
public Animal(String name, int age) { | |
this.name = name; | |
this.age = age; | |
} | |
public String toString() { | |
return this.name; | |
} | |
// @Override | |
// public int compareTo(Animal o) { | |
// return this.age - o.age; | |
// } | |
} | |
class AnimalComparatorAge implements Comparator<Animal> { | |
@Override | |
public int compare(Animal a1, Animal a2) { | |
return a1.age - a2.age; | |
} | |
} | |
public class HigherOrderFunctionsTest { | |
public static void main(String[] args) { | |
ArrayList<Animal> animals = new ArrayList<Animal>(); | |
for (Animal animal : new Animal[] { | |
new Animal("t-rex", 3000000), | |
new Animal("dog", 5), | |
new Animal("cat", 6), | |
new Animal("ostrichhhhhhhhh", 16), | |
}) { | |
animals.add(animal); | |
} | |
Collections.sort(animals, new AnimalComparatorAge()); | |
System.out.println(animals); | |
} | |
} |
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