completed lab

looptest.iml

@@ -10,10 +10,10 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.13-rc-1" level="project" />
     <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
-    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-databind:2.9.5" level="project" />
-    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-annotations:2.9.0" level="project" />
-    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-core:2.9.5" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-databind:2.10.1" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-annotations:2.10.1" level="project" />
+    <orderEntry type="library" name="Maven: com.fasterxml.jackson.core:jackson-core:2.10.1" level="project" />
   </component>
 </module>

src/main/java/com/zipcodewilmington/streams/StreamFilter.java

@@ -20,23 +20,23 @@ public class StreamFilter {
      * No arg constructor
      */ //TODO - construct person stream of 100 person objects; startingCharacter is a random capital letter
     public StreamFilter() {
-        this(Stream.empty(), null);
+        this(new PersonFactory().createPersonStream(100), RandomUtils.createCharacter('A', 'Z'));
     }
 
     /**
      * @param people - Array of person objects
      * @param startingCharacter - character to filter by
      */ //TODO
     public StreamFilter(Person[] people, Character startingCharacter) {
-        this(Stream.empty(), null);
+        this(Stream.of(people), startingCharacter);
     }
 
     /**
      * @param people - List of person objects
      * @param startingCharacter - character to filter by
      */ //TODO
     public StreamFilter(List<Person> people, Character startingCharacter) {
-        this(Stream.empty(), null);
+        this(people.stream(), startingCharacter);
     }
 
 
@@ -55,7 +55,7 @@ public StreamFilter(Stream<Person> people, Character startingCharacter) {
      * @return a list of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public List<Person> toListMultiLine() {
-        return null;
+        return this.personStream.filter(p -> p.getName().startsWith(startingCharacter)).collect(Collectors.toList());
     }
 
 
@@ -64,7 +64,7 @@ public List<Person> toListMultiLine() {
      * @return a list of person objects whose name starts with `this.startingCharacter`
      */ //TODO
     public List<Person> toListOneLine() {
-        return null;
+        return toListMultiLine();
     }
 
 
@@ -73,7 +73,7 @@ public List<Person> toListOneLine() {
      * @return an array of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public Person[] toArrayOneLine() {
-        return null;
+        return toArrayMultiLine();
     }
 
 
@@ -82,7 +82,7 @@ public Person[] toArrayOneLine() {
      * @return an array of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public Person[] toArrayMultiLine() {
-        return null;
+        return toListMultiLine().toArray(new Person[0]);
     }
 
 }

src/main/java/com/zipcodewilmington/streams/StreamMap.java

@@ -18,22 +18,24 @@ public class StreamMap {
      * @return - a Stream of single characters
      */ //TODO
     public static Stream<String> letters(String someWord) {
-        return null;
+        return Arrays.stream(someWord.split(""));
     }
 
     /**
      * @param someWords - variable amount of String arguments
      * @return - a Stream of several Streams of single characters
      */ //TODO
     public static Stream<Stream<String>> wordsMap(String... someWords) {
-        return null;
+        return Arrays.stream(someWords).map(output -> letters(output));
+        // could also be: return Arrays.stream(someWords).map(StreamMap::letters);
     }
 
     /**
      * @param stringArray - variable amount of String arguments
      * @return - a Stream of several Streams of single characters
      */ //TODO
     public static Stream<String> wordsFlatMap(String... stringArray) {
-        return null;
+        return Arrays.stream(stringArray).flatMap(output -> letters(output));
+        // could also be: return Arrays.stream(stringArray).flatMap(StreamMap::letters);
     }
 }

src/main/java/com/zipcodewilmington/streams/anthropoid/PersonFactory.java

@@ -39,7 +39,7 @@ public Person createRandomPerson() {
      * @return - ArrayList of Person objects
      */ // TODO
     public List<Person> createPersonList(int listSize) {
-        return null;
+        return Stream.generate(this::createRandomPerson).limit(listSize).collect(Collectors.toList());
     }
 
 
@@ -48,7 +48,7 @@ public List<Person> createPersonList(int listSize) {
      * @return - Array of Person objects
      */ // TODO
     public Person[] createPersonArray(int arrayLength) {
-        return null;
+        return Stream.generate(this::createRandomPerson).limit(arrayLength).toArray(Person[]::new);
     }
 
 
@@ -59,6 +59,6 @@ public Person[] createPersonArray(int arrayLength) {
      * @return - Stream representation of collection of Person objects
      */ // TODO
     public Stream<Person> createPersonStream(int streamCount) {
-        return null;
+        return Stream.generate(this::createRandomPerson).limit(streamCount);
     }
 }

src/main/java/com/zipcodewilmington/streams/anthropoid/PersonWarehouse.java

@@ -8,6 +8,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -36,15 +37,23 @@ public void addPerson(Person person) {
      * @return list of names of Person objects
      */ // TODO
     public List<String> getNames() {
-        return null;
+        return people.stream().map(Person::getName).collect(Collectors.toList());
     }
 
 
     /**
      * @return list of uniquely named Person objects
      */ //TODO
     public Stream<Person> getUniquelyNamedPeople() {
-        return null;
+        ArrayList<String> names = new ArrayList<>();
+        return people.stream().filter(unique -> {
+            if (!names.contains(unique.getName())){
+                names.add(unique.getName());
+                return true;
+            }
+            else
+                return false;
+        });
     }
 
 
@@ -53,38 +62,39 @@ public Stream<Person> getUniquelyNamedPeople() {
      * @return a Stream of respective
      */ //TODO
     public Stream<Person> getUniquelyNamedPeopleStartingWith(Character character) {
-        return null;
+        return people.stream().filter(name -> (name.getName().startsWith(String.valueOf(character))));
     }
 
     /**
      * @param n first `n` Person objects
      * @return a Stream of respective
      */ //TODO
     public Stream<Person> getFirstNUniquelyNamedPeople(int n) {
-        return null;
+        return getUniquelyNamedPeople().limit(n);
     }
 
     /**
      * @return a mapping of Person Id to the respective Person name
      */ // TODO
     public Map<Long, String> getIdToNameMap() {
-        return null;
+        return people.stream().collect(Collectors.toMap(Person::getPersonalId, Person::getName));
+        //creates a map that has a key as personal id and a value as a name
     }
 
-
     /**
      * @return Stream of Stream of Aliases
      */ // TODO
     public Stream<Stream<String>> getNestedAliases() {
-        return null;
+        return people.stream().map(name -> Stream.of(name.getAliases()));
     }
 
 
     /**
      * @return Stream of all Aliases
      */ // TODO
     public Stream<String> getAllAliases() {
-        return null;
+        return getNestedAliases().flatMap(Function.identity());
+        //look into further to understand exactly how this works.
     }
 
     // DO NOT MODIFY

src/main/java/com/zipcodewilmington/streams/conversions/ArrayConverter.java

@@ -3,6 +3,7 @@
 import com.zipcodewilmington.streams.anthropoid.Person;
 import com.zipcodewilmington.streams.anthropoid.PersonFactory;
 
+import java.lang.reflect.Array;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
@@ -25,12 +26,12 @@ public ArrayConverter(int collectionSize) {
 
     //TODO
     public List<Person> toList() {
-        return null;
+        return Arrays.asList(super.objectSequence);
     }
 
     //TODO
     public Stream<Person> toStream() {
-        return null;
+        return Arrays.stream(super.objectSequence);
     }
 
     @Override

src/main/java/com/zipcodewilmington/streams/conversions/ListConverter.java

@@ -3,6 +3,7 @@
 import com.zipcodewilmington.streams.anthropoid.Person;
 import com.zipcodewilmington.streams.anthropoid.PersonFactory;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -29,11 +30,11 @@ public List<Person> toList() {
 
     //TODO
     public Stream<Person> toStream() {
-        return null;
+        return Arrays.stream(super.objectSequence.toArray(new Person[0]));
     }
 
     //TODO
     public Person[] toArray() {
-        return null;
+        return toList().toArray(new Person[0]);
     }
 }

src/main/java/com/zipcodewilmington/streams/conversions/StreamConverter.java

@@ -25,16 +25,16 @@ public StreamConverter(int collectionSize) {
 
     // TODO
     public List<Person> toList() {
-        return null;
+        return personList;
     }
 
     // TODO
     public Stream<Person> toStream() {
-        return null;
+        return personList.stream();
     }
 
     // TODO
     public Person[] toArray() {
-        return null;
+        return personList.toArray(new Person[0]);
     }
 }