diff --git a/looptest.iml b/looptest.iml
index 7f2d304..e34277e 100644
--- a/looptest.iml
+++ b/looptest.iml
@@ -10,10 +10,10 @@
-
+
-
-
-
+
+
+
\ No newline at end of file
diff --git a/src/main/java/com/zipcodewilmington/streams/StreamFilter.java b/src/main/java/com/zipcodewilmington/streams/StreamFilter.java
index d8b89ae..ece93e2 100644
--- a/src/main/java/com/zipcodewilmington/streams/StreamFilter.java
+++ b/src/main/java/com/zipcodewilmington/streams/StreamFilter.java
@@ -5,6 +5,7 @@
import com.zipcodewilmington.streams.tools.RandomUtils;
import com.zipcodewilmington.streams.tools.StringUtils;
+import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
@@ -16,11 +17,13 @@ public class StreamFilter {
private final Stream personStream;
public final String startingCharacter;
+
+
/**
* 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'));
}
/**
@@ -28,7 +31,7 @@ public StreamFilter() {
* @param startingCharacter - character to filter by
*/ //TODO
public StreamFilter(Person[] people, Character startingCharacter) {
- this(Stream.empty(), null);
+ this(Arrays.stream(people), startingCharacter);
}
/**
@@ -36,7 +39,7 @@ public StreamFilter(Person[] people, Character startingCharacter) {
* @param startingCharacter - character to filter by
*/ //TODO
public StreamFilter(List people, Character startingCharacter) {
- this(Stream.empty(), null);
+ this(people.stream(), startingCharacter);
}
@@ -55,7 +58,10 @@ public StreamFilter(Stream people, Character startingCharacter) {
* @return a list of person object whose name starts with `this.startingCharacter`
*/ //TODO
public List toListMultiLine() {
- return null;
+ List listMultiLine = personStream
+ .filter(person -> startingCharacter.equals(person.getName().charAt(0)))
+ .collect(Collectors.toList());
+ return listMultiLine;
}
@@ -64,7 +70,10 @@ public List toListMultiLine() {
* @return a list of person objects whose name starts with `this.startingCharacter`
*/ //TODO
public List toListOneLine() {
- return null;
+ List listOneLine = personStream
+ .filter(person -> startingCharacter.equals(person.getName().charAt(0)))
+ .collect(Collectors.toList());
+ return listOneLine;
}
@@ -73,7 +82,10 @@ public List toListOneLine() {
* @return an array of person object whose name starts with `this.startingCharacter`
*/ //TODO
public Person[] toArrayOneLine() {
- return null;
+ Person[] arrayOneLine = personStream
+ .filter(person -> startingCharacter.equals(person.getName().charAt(0)))
+ .toArray(Person[]::new);
+ return arrayOneLine;
}
@@ -82,7 +94,10 @@ public Person[] toArrayOneLine() {
* @return an array of person object whose name starts with `this.startingCharacter`
*/ //TODO
public Person[] toArrayMultiLine() {
- return null;
+ Person[] arrayOneLine = personStream
+ .filter(person -> startingCharacter.equals(person.getName().charAt(0)))
+ .toArray(Person[]::new);
+ return arrayOneLine;
}
}
diff --git a/src/main/java/com/zipcodewilmington/streams/StreamMap.java b/src/main/java/com/zipcodewilmington/streams/StreamMap.java
index cf35024..17fc150 100644
--- a/src/main/java/com/zipcodewilmington/streams/StreamMap.java
+++ b/src/main/java/com/zipcodewilmington/streams/StreamMap.java
@@ -18,7 +18,10 @@ public class StreamMap {
* @return - a Stream of single characters
*/ //TODO
public static Stream letters(String someWord) {
- return null;
+ Stream lettersList = someWord
+ .codePoints()
+ .mapToObj(c -> String.valueOf(c));
+ return lettersList;
}
/**
@@ -26,7 +29,9 @@ public static Stream letters(String someWord) {
* @return - a Stream of several Streams of single characters
*/ //TODO
public static Stream> wordsMap(String... someWords) {
- return null;
+ Stream> wordsMapStream = Arrays.stream(someWords)
+ .map(word -> letters(word));
+ return wordsMapStream;
}
/**
@@ -34,6 +39,8 @@ public static Stream> wordsMap(String... someWords) {
* @return - a Stream of several Streams of single characters
*/ //TODO
public static Stream wordsFlatMap(String... stringArray) {
- return null;
+ Stream wordsFlatMapStream = Arrays.stream(stringArray)
+ .flatMap(word -> letters(word));
+ return wordsFlatMapStream;
}
}
\ No newline at end of file
diff --git a/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonFactory.java b/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonFactory.java
index a10ec7b..6df2ac8 100644
--- a/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonFactory.java
+++ b/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonFactory.java
@@ -3,8 +3,7 @@
import com.zipcodewilmington.streams.tools.RandomUtils;
import com.zipcodewilmington.streams.tools.StringUtils;
-import java.util.Date;
-import java.util.List;
+import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
@@ -39,7 +38,16 @@ public Person createRandomPerson() {
* @return - ArrayList of Person objects
*/ // TODO
public List createPersonList(int listSize) {
- return null;
+ List newPersonList = Stream
+ .generate(this::createRandomPerson)
+ .limit(listSize)
+ .collect(Collectors.toList());
+ return newPersonList;
+// List list = new ArrayList<>();
+// Collections.nCopies(listSize, 1)
+// .stream()
+// .forEach(i -> list.add(createRandomPerson())); //close stream - terminal operation
+// return list;
}
@@ -48,7 +56,11 @@ public List createPersonList(int listSize) {
* @return - Array of Person objects
*/ // TODO
public Person[] createPersonArray(int arrayLength) {
- return null;
+ Person[] newPersonArray = Stream
+ .generate(this::createRandomPerson)
+ .limit(arrayLength)
+ .toArray(Person[]::new);
+ return newPersonArray;
}
@@ -59,6 +71,9 @@ public Person[] createPersonArray(int arrayLength) {
* @return - Stream representation of collection of Person objects
*/ // TODO
public Stream createPersonStream(int streamCount) {
- return null;
+ Stream newStream = Stream
+ .generate(this::createRandomPerson)
+ .limit(streamCount);
+ return newStream;
}
}
diff --git a/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonWarehouse.java b/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonWarehouse.java
index a4960b1..9562342 100644
--- a/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonWarehouse.java
+++ b/src/main/java/com/zipcodewilmington/streams/anthropoid/PersonWarehouse.java
@@ -4,10 +4,9 @@
import com.zipcodewilmington.streams.tools.logging.LoggerHandler;
import com.zipcodewilmington.streams.tools.logging.LoggerWarehouse;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
+import java.util.function.Function;
+import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;
@@ -36,7 +35,10 @@ public void addPerson(Person person) {
* @return list of names of Person objects
*/ // TODO
public List getNames() {
- return null;
+ List names = people.stream()
+ .map(Person::getName)
+ .collect(Collectors.toList());
+ return names;
}
@@ -44,7 +46,29 @@ public List getNames() {
* @return list of uniquely named Person objects
*/ //TODO
public Stream getUniquelyNamedPeople() {
- return null;
+// List names = getNames().stream().distinct().collect(Collectors.toList());
+// Predicate matchNames = val -> names.contains(val.getName());
+// Stream uniquePersons = people
+// .stream()
+// .filter(matchNames);
+// return uniquePersons;
+
+ //google distinct
+ List namesList = getNames()
+ .stream()
+ .distinct()
+ .collect(Collectors.toList());
+ List uniquelyNamedPeople = new ArrayList<>();
+
+ people.stream()
+ .forEach(person -> {
+ if(namesList.contains(person.getName())){
+ uniquelyNamedPeople.add(person);
+ namesList.remove(person.getName());
+ }
+ });
+ Stream result = uniquelyNamedPeople.stream();
+ return result;
}
@@ -53,7 +77,9 @@ public Stream getUniquelyNamedPeople() {
* @return a Stream of respective
*/ //TODO
public Stream getUniquelyNamedPeopleStartingWith(Character character) {
- return null;
+ Stream peopleStartingWithC = getUniquelyNamedPeople()
+ .filter(person -> person.getName().charAt(0) == character);
+ return peopleStartingWithC;
}
/**
@@ -61,14 +87,19 @@ public Stream getUniquelyNamedPeopleStartingWith(Character character) {
* @return a Stream of respective
*/ //TODO
public Stream getFirstNUniquelyNamedPeople(int n) {
- return null;
+ Stream firstUniquelyNamedPeople = getUniquelyNamedPeople()
+ .limit(n);
+ return firstUniquelyNamedPeople;
}
/**
* @return a mapping of Person Id to the respective Person name
*/ // TODO
public Map getIdToNameMap() {
- return null;
+ Map idToNameMap = people
+ .stream()
+ .collect(Collectors.toMap(Person::getPersonalId, Person::getName));
+ return idToNameMap;
}
@@ -76,7 +107,7 @@ public Map getIdToNameMap() {
* @return Stream of Stream of Aliases
*/ // TODO
public Stream> getNestedAliases() {
- return null;
+ return Stream.of(getAllAliases());
}
@@ -84,7 +115,10 @@ public Stream> getNestedAliases() {
* @return Stream of all Aliases
*/ // TODO
public Stream getAllAliases() {
- return null;
+ Stream allAliases = people
+ .stream()
+ .flatMap(val -> Arrays.stream(val.getAliases()));
+ return allAliases;
}
// DO NOT MODIFY
diff --git a/src/main/java/com/zipcodewilmington/streams/conversions/ArrayConverter.java b/src/main/java/com/zipcodewilmington/streams/conversions/ArrayConverter.java
index 0a9d4d8..bee25cf 100644
--- a/src/main/java/com/zipcodewilmington/streams/conversions/ArrayConverter.java
+++ b/src/main/java/com/zipcodewilmington/streams/conversions/ArrayConverter.java
@@ -2,6 +2,7 @@
import com.zipcodewilmington.streams.anthropoid.Person;
import com.zipcodewilmington.streams.anthropoid.PersonFactory;
+import com.zipcodewilmington.streams.anthropoid.PersonWarehouse;
import java.util.Arrays;
import java.util.List;
@@ -25,12 +26,15 @@ public ArrayConverter(int collectionSize) {
//TODO
public List toList() {
- return null;
+ List list = Arrays.stream(this.objectSequence)
+ .collect(Collectors.toList());
+ return list;
}
//TODO
public Stream toStream() {
- return null;
+ Stream stream = Arrays.stream(this.objectSequence);
+ return stream;
}
@Override
diff --git a/src/main/java/com/zipcodewilmington/streams/conversions/ListConverter.java b/src/main/java/com/zipcodewilmington/streams/conversions/ListConverter.java
index b64540b..167f1a9 100644
--- a/src/main/java/com/zipcodewilmington/streams/conversions/ListConverter.java
+++ b/src/main/java/com/zipcodewilmington/streams/conversions/ListConverter.java
@@ -29,11 +29,13 @@ public List toList() {
//TODO
public Stream toStream() {
- return null;
+ Stream stream = this.objectSequence.stream();
+ return stream;
}
//TODO
public Person[] toArray() {
- return null;
+ Person[] array = this.objectSequence.toArray(new Person[0]);
+ return array;
}
}
diff --git a/src/main/java/com/zipcodewilmington/streams/conversions/StreamConverter.java b/src/main/java/com/zipcodewilmington/streams/conversions/StreamConverter.java
index 159d048..ab1f3d2 100644
--- a/src/main/java/com/zipcodewilmington/streams/conversions/StreamConverter.java
+++ b/src/main/java/com/zipcodewilmington/streams/conversions/StreamConverter.java
@@ -25,16 +25,18 @@ public StreamConverter(int collectionSize) {
// TODO
public List toList() {
- return null;
+ return personList;
}
// TODO
public Stream toStream() {
- return null;
+ Stream stream = personList.stream();
+ return stream;
}
// TODO
public Person[] toArray() {
- return null;
+ Person[] array = personList.toArray(new Person[0]);
+ return array;
}
}