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Lambdas exercises #1

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241291d
- Lambdas 01 execise done
Mar 30, 2017
f7fff61
- Lambdas 01 execise done
Mar 30, 2017
db2f52a
Merge branch 'master' of D:\Projects\Idea\java8\lambda with conflicts.
Mar 31, 2017
469edbb
exec 01 done
Mar 31, 2017
a003025
exec 02 done
Mar 31, 2017
8cae98e
Delete gradlew
Mar 31, 2017
02fb2ab
..
Apr 2, 2017
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Empty file modified gradlew
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23 changes: 23 additions & 0 deletions src/test/java/lambda/part1/exercise/Lambdas01Exercise.java
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Original file line number Diff line number Diff line change
@@ -1,9 +1,14 @@
package lambda.part1.exercise;

import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
import data.Person;
import org.junit.jupiter.api.Test;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
Expand All @@ -20,6 +25,12 @@ void sortPersonsByAge() {
};

// TODO use Arrays.sort
Arrays.sort(persons, new Comparator<Person>() {
@Override
public int compare(Person p1, Person p2) {
return Integer.compare(p1.getAge(), p2.getAge());
}
});

assertArrayEquals(persons, new Person[]{
new Person("name 3", "lastName 3", 20),
Expand All @@ -39,6 +50,18 @@ void findFirstWithAge30() {
Person person = null;

// TODO use FluentIterable
Optional<Person> personOptional =
FluentIterable.from(persons)
.firstMatch(new Predicate<Person>() {
@Override
public boolean apply(Person p) {
return p.getAge()==30;
}
});


if (personOptional.isPresent())
person = personOptional.get();

assertEquals(person, new Person("name 1", "lastName 2", 30));
}
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10 changes: 10 additions & 0 deletions src/test/java/lambda/part1/exercise/Lambdas02Exercise.java
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Original file line number Diff line number Diff line change
@@ -1,9 +1,12 @@
package lambda.part1.exercise;

import com.google.common.base.Optional;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
import data.Person;
import org.junit.jupiter.api.Test;

import java.util.Arrays;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
Expand All @@ -19,6 +22,7 @@ void sortPersonsByAge() {
};

// TODO use Arrays.sort
Arrays.sort(persons, (o1, o2) -> Integer.compare(o1.getAge(), o2.getAge()));

assertArrayEquals(persons, new Person[]{
new Person("name 3", "lastName 3", 20),
Expand All @@ -38,6 +42,12 @@ void findFirstWithAge30() {
Person person = null;

// TODO use FluentIterable
Optional<Person> personOptional = FluentIterable
.from(persons)
.firstMatch(p -> p.getAge() == 30);

if (personOptional.isPresent())
person = personOptional.get();

assertEquals(person, new Person("name 1", "lastName 2", 30));
}
Expand Down