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BetterLists 1.2 : Code improvement

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Klemek
2018-04-19 13:46:35 +02:00
parent ac07531021
commit 2473f256f7
9 changed files with 470 additions and 410 deletions
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.gitignore
+3
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@@ -1,3 +1,6 @@
/bin/
/.classpath
/.settings/
/target/
/maven-repo.bat
/.idea/
README.md
+15 -10
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@@ -4,7 +4,7 @@ An extension of the java.util.List interface which include some of the C# LINQ u
List classes are extended as well. (ArrayList -> BetterArrayList)
Current version v1.1
Current version v1.2
Before BetterLists :
```Java
@@ -30,7 +30,7 @@ NOTE : Please note that, unlike C# LINQ, these functions are not optimized at lo
## Download
* [betterlists-1.1.jar](../../raw/master/download/betterlists-1.0.jar)
* [betterlists-1.2.jar](../../raw/master/download/betterlists-1.2.jar)
## Maven
@@ -49,7 +49,7 @@ You can use this project as a maven dependency with this :
<dependency>
<groupId>klemek</groupId>
<artifactId>betterlists</artifactId>
<version>1.1</version>
<version>1.2</version>
</dependency>
</dependencies>
```
@@ -68,7 +68,7 @@ You can use this project as a maven dependency with this :
| [max](#max) | Invokes a transform function on each element of the sequence and returns the maximum nullable Double value. |
| [mean](#mean) | Computes the mean of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. |
| [min](#min) | Invokes a transform function on each element of the sequence and returns the minimum nullable Double value. |
| [orderBy / orderByDescending](#orderby-orderbydescending) | Sorts the elements of a sequence in ascending order by using a specified comparer. (You can user orderByDescending to change the order) |
| [orderBy / orderByDescending](#orderby-orderbydescending) | Sorts the elements of a sequence in ascending order by using a specified comparator. (You can user orderByDescending to change the order) |
| [reverse](#reverse) | Inverts the order of the elements in the sequence. |
| [select](#select) | Projects each element of a sequence into a new form. |
| [skip / skipWhile](#skip-skipwhile) | Bypasses elements in the sequence as long as a specified condition is true and then returns the remaining elements. |
@@ -111,19 +111,21 @@ BetterList<Contact> invalidFrenchContacts = frenchContacts.exclusion(validContac
```
### first / firstOrDefault
Returns the first element in the sequence that satisfies a specified condition. (Returns an error if no elements match the condition unless you use the `firstOrDefault` function)
Returns the first element in the sequence that satisfies a specified condition. (Throws an error if no elements match the condition unless you use the `firstOrDefault` function)
```Java
BetterArrayList<Contact> contacts = BetterArrayList.fromList(someFunction());
Contact firstManager = contacts.first(c -> c.isManager());
Contact firstManager = contacts.first(c -> c.isManager()); //can throw NoSuchElementException
Contact firstContact = contacts.firstOrDefault(null); //return null if the list is empty
```
### last / lastOrDefault
Returns the last element in the sequence that satisfies a specified condition. (Returns an error if no elements match the condition unless you use the `lastOrDefault` function)
Returns the last element in the sequence that satisfies a specified condition. (Throws an error if no elements match the condition unless you use the `lastOrDefault` function)
```Java
BetterArrayList<Contact> contacts = BetterArrayList.fromList(someFunction());
Contact lastRegular = contacts.last(c -> !c.isManager());
Contact lastRegular = contacts.last(c -> !c.isManager()); //can throw NoSuchElementException
Contact lastManager = contacts.lastOrDefault(c -> c.isManager(), null); //return null there is no manager
```
### max
@@ -156,6 +158,7 @@ Sorts the elements of a sequence in ascending order by using a specified compare
BetterArrayList<Contact> contacts = BetterArrayList.fromList(someFunction());
BetterList<Contact> orderedContacts = contacts.orderBy(c -> c.getName);
BetterList<Contact> orderedContacts2 = contacts.orderByDescending(c -> c.getAge()); //oldest first
```
### reverse
@@ -179,7 +182,8 @@ Bypasses elements in the sequence as long as a specified condition is true and t
```Java
BetterArrayList<Contact> contacts = BetterArrayList.fromList(someFunction());
BetterList<Contact> contacts2 = contacts.skipWhile(c -> c.getEmail().startsWith("society"));
BetterList<Contact> contacts2 = contacts.skip(3);
BetterList<Contact> contacts3 = contacts.skipWhile(c -> c.getEmail().startsWith("society"));
```
### sum
@@ -195,7 +199,8 @@ Returns a specified number of contiguous elements from the start of the sequence
```Java
BetterArrayList<Contact> contacts = BetterArrayList.fromList(someFunction());
BetterList<Contact> contacts2 = contacts.takeWhile(c -> c.getEmail().startsWith("society"));
BetterList<Contact> contacts2 = contacts.take(5);
BetterList<Contact> contacts3 = contacts.takeWhile(c -> c.getEmail().startsWith("society"));
```
### union
download/betterlists-1.2.jar
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src/fr/klemek/betterlists/BetterArrayList.java
+29 -10
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@@ -1,6 +1,7 @@
package fr.klemek.betterlists;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
/**
@@ -26,6 +27,15 @@ public class BetterArrayList<T> extends ArrayList<T> implements BetterList<T> {
return new BetterArrayList<>(c);
}
/**
* Constructs a list containing the elements given in argument.
*
* @param a - the elements to be placed into this list
*/
public static <T> BetterArrayList<T> asList(T... a) {
return new BetterArrayList<>(a);
}
/**
* Constructs an empty list with an initial capacity of ten.
*/
@@ -45,14 +55,23 @@ public class BetterArrayList<T> extends ArrayList<T> implements BetterList<T> {
}
/**
* Constructs an empty list with the specified initial capacity.
*
* @param initialCapacity
* - the initial capacity of the list
*/
public BetterArrayList(int initialCapacity) {
super(initialCapacity);
}
* Constructs a list containing the elements given in argument.
*
* @param a
* - the elements to be placed into this list
*/
public BetterArrayList(T... a) {
super(Arrays.asList(a));
}
/**
* Constructs an empty list with the specified initial capacity.
*
* @param initialCapacity - the initial capacity of the list
*/
public BetterArrayList(int initialCapacity) {
super(initialCapacity);
}
/**
* Returns a view of the portion of this list between the specified fromIndex,
@@ -77,6 +96,6 @@ public class BetterArrayList<T> extends ArrayList<T> implements BetterList<T> {
*/
@Override
public BetterArrayList<T> subList(int fromIndex, int toIndex) {
return (BetterArrayList<T>) this.subList(fromIndex, toIndex);
}
return (BetterArrayList<T>) super.subList(fromIndex, toIndex);
}
}
src/fr/klemek/betterlists/BetterLinkedList.java
+41 -24
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@@ -1,5 +1,6 @@
package fr.klemek.betterlists;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
@@ -26,6 +27,15 @@ public class BetterLinkedList<T> extends LinkedList<T> implements BetterList<T>
return new BetterLinkedList<>(c);
}
/**
* Constructs a list containing the elements given in argument.
*
* @param a - the elements to be placed into this list
*/
public static <T> BetterLinkedList<T> asList(T... a) {
return new BetterLinkedList<>(a);
}
/**
* Constructs an empty list.
*/
@@ -45,29 +55,36 @@ public class BetterLinkedList<T> extends LinkedList<T> implements BetterList<T>
}
/**
* Returns a view of the portion of this list between the specified fromIndex,
* inclusive, and toIndex, exclusive. (If fromIndex and toIndex are equal, the
* returned list is empty.) The returned list is backed by this list, so
* non-structural changes in the returned list are reflected in this list, and
* vice-versa. The returned list supports all of the optional list operations
* supported by this list. This method eliminates the need for explicit range
* operations (of the sort that commonly exist for arrays). Any operation that
* expects a list can be used as a range operation by passing a subList view
* instead of a whole list. (see List.subList)
*
* @param fromIndex
* - low endpoint (inclusive) of the subList
* @param toIndex
* - high endpoint (exclusive) of the subList
* @return a view of the specified range within this list
* @throws IndexOutOfBoundsException
* for an illegal endpoint index value (fromIndex < 0 || toIndex >
* size || fromIndex > toIndex)
* @see java.util.List
*/
@Override
public BetterLinkedList<T> subList(int fromIndex, int toIndex) {
return (BetterLinkedList<T>) this.subList(fromIndex, toIndex);
}
* Constructs a list containing the elements given in argument.
*
* @param a
* - the elements to be placed into this list
*/
public BetterLinkedList(T... a) {
super(Arrays.asList(a));
}
/**
* Returns a view of the portion of this list between the specified fromIndex,
* inclusive, and toIndex, exclusive. (If fromIndex and toIndex are equal, the
* returned list is empty.) The returned list is backed by this list, so
* non-structural changes in the returned list are reflected in this list, and
* vice-versa. The returned list supports all of the optional list operations
* supported by this list. This method eliminates the need for explicit range
* operations (of the sort that commonly exist for arrays). Any operation that
* expects a list can be used as a range operation by passing a subList view
* instead of a whole list. (see List.subList)
*
* @param fromIndex - low endpoint (inclusive) of the subList
* @param toIndex - high endpoint (exclusive) of the subList
* @return a view of the specified range within this list
* @throws IndexOutOfBoundsException for an illegal endpoint index value (fromIndex < 0 || toIndex >
* size || fromIndex > toIndex)
* @see java.util.List
*/
@Override
public BetterLinkedList<T> subList(int fromIndex, int toIndex) {
return (BetterLinkedList<T>) super.subList(fromIndex, toIndex);
}
}
src/fr/klemek/betterlists/BetterList.java
+26 -26
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@@ -38,7 +38,7 @@ public interface BetterList<T> extends List<T> {
* @return true if any elements in the source sequence pass the test in the
* specified predicate; otherwise, false.
*/
public default boolean any(Function<T, Boolean> predicate) {
default boolean any(Function<T, Boolean> predicate) {
for (T element : this)
if (predicate.apply(element))
return true;
@@ -50,7 +50,7 @@ public interface BetterList<T> extends List<T> {
*
* @return The number of elements in the input sequence.
*/
public default int count() {
default int count() {
return count(e -> true);
}
@@ -63,7 +63,7 @@ public interface BetterList<T> extends List<T> {
* @return A number that represents how many elements in the sequence satisfy
* the condition in the predicate function.
*/
public default int count(Function<T, Boolean> predicate) {
default int count(Function<T, Boolean> predicate) {
int out = 0;
for (T element : this)
if (predicate.apply(element))
@@ -80,7 +80,7 @@ public interface BetterList<T> extends List<T> {
* @return A List that contains the elements from the first sequence not present
* in the other.
*/
public default BetterList<T> exclusion(List<T> other) {
default BetterList<T> exclusion(List<T> other) {
BetterList<T> out = new BetterArrayList<>();
for (T element : this)
if (!other.contains(element))
@@ -95,7 +95,7 @@ public interface BetterList<T> extends List<T> {
* If the sequence is empty.
* @return The first element in the sequence.
*/
public default T first() {
default T first() {
return first(e -> true);
}
@@ -111,7 +111,7 @@ public interface BetterList<T> extends List<T> {
* @return The first element in the sequence that passes the test in the
* specified predicate function.
*/
public default T first(Function<T, Boolean> predicate) {
default T first(Function<T, Boolean> predicate) {
for (T element : this)
if (predicate.apply(element))
return element;
@@ -130,7 +130,7 @@ public interface BetterList<T> extends List<T> {
* test specified by predicate; otherwise, the first element in the
* sequence that passes the test specified by predicate.
*/
public default T firstOrDefault(Function<T, Boolean> predicate, T defaultValue) {
default T firstOrDefault(Function<T, Boolean> predicate, T defaultValue) {
for (T element : this)
if (predicate.apply(element))
return element;
@@ -146,7 +146,7 @@ public interface BetterList<T> extends List<T> {
* @return defaultValue if the sequence is empty otherwise, the first element in
* the sequence.
*/
public default T firstOrDefault(T defaultValue) {
default T firstOrDefault(T defaultValue) {
return firstOrDefault(e -> true, defaultValue);
}
@@ -157,7 +157,7 @@ public interface BetterList<T> extends List<T> {
* If the sequence is empty.
* @return the last element of the sequence.
*/
public default T last() {
default T last() {
return last(e -> true);
}
@@ -173,7 +173,7 @@ public interface BetterList<T> extends List<T> {
* @return the last element of the sequence that satisfies a specified
* condition.
*/
public default T last(Function<T, Boolean> predicate) {
default T last(Function<T, Boolean> predicate) {
T value = null;
for (T element : this)
if (predicate.apply(element))
@@ -195,7 +195,7 @@ public interface BetterList<T> extends List<T> {
* test specified by predicate; otherwise, the last element in the
* sequence that passes the test specified by predicate.
*/
public default T lastOrDefault(Function<T, Boolean> predicate, T defaultValue) {
default T lastOrDefault(Function<T, Boolean> predicate, T defaultValue) {
T value = null;
for (T element : this)
if (predicate.apply(element))
@@ -212,7 +212,7 @@ public interface BetterList<T> extends List<T> {
* @return defaultValue if the sequence is empty otherwise, the last element in
* the sequence.
*/
public default T lastOrDefault(T defaultValue) {
default T lastOrDefault(T defaultValue) {
return lastOrDefault(e -> true, defaultValue);
}
@@ -225,7 +225,7 @@ public interface BetterList<T> extends List<T> {
* @return The value of type Double that corresponds to the maximum value in the
* sequence or null if the sequence is empty.
*/
public default Double max(Function<T, Double> selector) {
default Double max(Function<T, Double> selector) {
Double max = null;
for (T element : this)
if (max == null || selector.apply(element) > max)
@@ -242,7 +242,7 @@ public interface BetterList<T> extends List<T> {
* @return The mean of the projected values. Null if the sequence contains no
* elements.
*/
public default Double mean(Function<T, Double> selector) {
default Double mean(Function<T, Double> selector) {
int count = this.count();
if (count == 0)
return null;
@@ -258,7 +258,7 @@ public interface BetterList<T> extends List<T> {
* @return The value of type Double that corresponds to the minimum value in the
* sequence or null if the sequence is empty.
*/
public default Double min(Function<T, Double> selector) {
default Double min(Function<T, Double> selector) {
Double min = null;
for (T element : this)
if (min == null || selector.apply(element) < min)
@@ -272,7 +272,7 @@ public interface BetterList<T> extends List<T> {
* - A transform function to apply to each element.
* @return a List whose elements are sorted according to a key.
*/
public default <E extends Comparable<E>> BetterList<T> orderBy(Function<T, E> selector){
default <E extends Comparable<E>> BetterList<T> orderBy(Function<T, E> selector) {
BetterList<T> out = new BetterArrayList<>();
out.addAll(this);
Collections.sort(out, (o1,o2) -> selector.apply(o1).compareTo(selector.apply(o2)));
@@ -285,7 +285,7 @@ public interface BetterList<T> extends List<T> {
* - A transform function to apply to each element.
* @return a List whose elements are sorted according to a key.
*/
public default <E extends Comparable<E>> BetterList<T> orderByDescending(Function<T, E> selector){
default <E extends Comparable<E>> BetterList<T> orderByDescending(Function<T, E> selector) {
BetterList<T> out = new BetterArrayList<>();
out.addAll(this);
Collections.sort(out, (o1,o2) -> selector.apply(o2).compareTo(selector.apply(o1)));
@@ -298,7 +298,7 @@ public interface BetterList<T> extends List<T> {
* @return A sequence whose elements correspond to those of the sequence in
* reverse order.
*/
public default BetterList<T> reverse() {
default BetterList<T> reverse() {
BetterList<T> out = new BetterArrayList<>(this.size());
for (T element : this)
out.add(0, element);
@@ -315,7 +315,7 @@ public interface BetterList<T> extends List<T> {
* @return A List whose elements are the result of invoking the transform
* function on each element of the sequence.
*/
public default <E> BetterList<E> select(Function<T, E> selector) {
default <E> BetterList<E> select(Function<T, E> selector) {
BetterList<E> out = new BetterArrayList<>();
for (T element : this)
out.add(selector.apply(element));
@@ -332,7 +332,7 @@ public interface BetterList<T> extends List<T> {
* @return a List that contains the elements that occur after the specified
* index in the sequence.
*/
public default BetterList<T> skip(int count) {
default BetterList<T> skip(int count) {
BetterList<T> out = new BetterArrayList<>();
int n = 0;
for (T element : this) {
@@ -353,7 +353,7 @@ public interface BetterList<T> extends List<T> {
* first element in the linear series that does not pass the test
* specified by predicate.
*/
public default BetterList<T> skipWhile(Function<T, Boolean> predicate) {
default BetterList<T> skipWhile(Function<T, Boolean> predicate) {
BetterList<T> out = new BetterArrayList<>();
boolean match = true;
for (T element : this)
@@ -373,7 +373,7 @@ public interface BetterList<T> extends List<T> {
* @return The sum of the projected values. Zero if the sequence contains no
* elements.
*/
public default Double sum(Function<T, Double> selector) {
default Double sum(Function<T, Double> selector) {
double sum = 0d;
for (T element : this)
sum += selector.apply(element);
@@ -389,7 +389,7 @@ public interface BetterList<T> extends List<T> {
* @return a List that contains the specified number of elements from the start
* of the input sequence.
*/
public default BetterList<T> take(int count) {
default BetterList<T> take(int count) {
BetterList<T> out = new BetterArrayList<>(count);
int n = 0;
for (T element : this) {
@@ -410,7 +410,7 @@ public interface BetterList<T> extends List<T> {
* @return a List that contains the elements from the sequence that occur before
* the element at which the test no longer passes.
*/
public default BetterList<T> takeWhile(Function<T, Boolean> predicate) {
default BetterList<T> takeWhile(Function<T, Boolean> predicate) {
BetterList<T> out = new BetterArrayList<>();
for (T element : this)
if (predicate.apply(element))
@@ -429,7 +429,7 @@ public interface BetterList<T> extends List<T> {
* @return A List that contains the elements from both sequences, excluding
* duplicates.
*/
public default BetterList<T> union(List<T> other) {
default BetterList<T> union(List<T> other) {
BetterList<T> out = new BetterArrayList<>();
for (T element : this)
if (other.contains(element))
@@ -445,7 +445,7 @@ public interface BetterList<T> extends List<T> {
* @return a List that contains elements from the sequence that satisfy the
* condition.
*/
public default BetterList<T> where(Function<T, Boolean> predicate) {
default BetterList<T> where(Function<T, Boolean> predicate) {
BetterList<T> out = new BetterArrayList<>();
for (T element : this)
if (predicate.apply(element))
src/fr/klemek/betterlists/BetterStack.java
+1 -1
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@@ -44,7 +44,7 @@ public class BetterStack<T> extends Stack<T> implements BetterList<T> {
*/
@Override
public BetterStack<T> subList(int fromIndex, int toIndex) {
return (BetterStack<T>) this.subList(fromIndex, toIndex);
return (BetterStack<T>) super.subList(fromIndex, toIndex);
}
}
src/fr/klemek/betterlists/BetterVector.java
+23 -5
View File
@@ -1,5 +1,6 @@
package fr.klemek.betterlists;
import java.util.Arrays;
import java.util.Collection;
import java.util.Vector;
@@ -25,7 +26,16 @@ public class BetterVector<T> extends Vector<T> implements BetterList<T> {
public static <T> BetterVector<T> fromList(Collection<T> c) {
return new BetterVector<>(c);
}
/**
* Constructs a vector containing the elements given in argument.
*
* @param a - the elements to be placed into this vector
*/
public static <T> BetterVector<T> asVector(T... a) {
return new BetterVector<>(a);
}
/**
* Constructs an empty vector so that its internal data array has size 10 and
* its standard capacity increment is zero.
@@ -45,12 +55,20 @@ public class BetterVector<T> extends Vector<T> implements BetterList<T> {
super(c);
}
/**
* Constructs a vector containing the elements given in argument.
*
* @param a - the elements to be placed into this list
*/
public BetterVector(T... a) {
super(Arrays.asList(a));
}
/**
* Constructs an empty vector with the specified initial capacity and with its
* capacity increment equal to zero.
*
* @param initialCapacity
* - the initial capacity of the vector
*
* @param initialCapacity - the initial capacity of the vector
*/
public BetterVector(int initialCapacity) {
super(initialCapacity);
@@ -93,7 +111,7 @@ public class BetterVector<T> extends Vector<T> implements BetterList<T> {
*/
@Override
public BetterVector<T> subList(int fromIndex, int toIndex) {
return (BetterVector<T>) this.subList(fromIndex, toIndex);
return (BetterVector<T>) super.subList(fromIndex, toIndex);
}
}
test/fr/klemek/betterlists/BetterListsTests.java → test/fr/klemek/betterlists/test/BetterListsTests.java
+332 -334
View File
@@ -1,334 +1,332 @@
package fr.klemek.betterlists;
import java.util.ArrayList;
import java.util.NoSuchElementException;
import org.junit.Assert;
import org.junit.Test;
public class BetterListsTests {
protected class Dummy {
double d;
String s;
public Dummy(double d, String s) {
this.d = d;
this.s = s;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Dummy other = (Dummy) obj;
if (!getOuterType().equals(other.getOuterType()))
return false;
if (Double.doubleToLongBits(d) != Double.doubleToLongBits(other.d))
return false;
if (s == null) {
if (other.s != null)
return false;
} else if (!s.equals(other.s))
return false;
return true;
}
private BetterListsTests getOuterType() {
return BetterListsTests.this;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + getOuterType().hashCode();
long temp;
temp = Double.doubleToLongBits(d);
result = prime * result + (int) (temp ^ (temp >>> 32));
result = prime * result + ((s == null) ? 0 : s.hashCode());
return result;
}
}
@Test
public void testAll() {
ArrayList<Dummy> al = new ArrayList<Dummy>();
al.add(new Dummy(1d,"hello"));
al.add(new Dummy(2d,"test"));
al.add(new Dummy(2d,"hello"));
BetterArrayList<Dummy> bal = BetterArrayList.fromList(al);
Assert.assertTrue(bal.all(du -> du.d > 0));
Assert.assertFalse(bal.all(du -> du.d > 1));
}
@Test
public void testAny() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertTrue(bal.any(du -> du.s.startsWith("t")));
Assert.assertFalse(bal.any(du -> du.s.startsWith("b")));
}
@Test
public void testCount() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertEquals(3, bal.count());
Assert.assertEquals(2, bal.count(du -> du.s.length() > 4));
}
@Test
public void testExclude() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"test"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
BetterArrayList<Dummy> bal2 = new BetterArrayList<Dummy>();
bal2.add(new Dummy(2d,"test"));
bal2.add(new Dummy(3d,"hello"));
bal2.add(new Dummy(5d,"test"));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.exclusion(bal2);
Assert.assertEquals(2, bal3.size());
Assert.assertEquals(bal1.get(0), bal3.get(0));
Assert.assertEquals(bal1.get(3), bal3.get(1));
}
@Test
public void testFirst() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertEquals(bal.get(0), bal.first(du -> du.s.startsWith("h")));
try {
bal.first(du -> du.s.startsWith("d"));
Assert.fail("no error");
} catch (NoSuchElementException e) {
}
Assert.assertEquals(bal.get(0), bal.firstOrDefault(du -> du.s.startsWith("h"), new Dummy(3d,"default")));
Assert.assertEquals(new Dummy(3d,"default"), bal.firstOrDefault(du -> du.s.startsWith("d"), new Dummy(3d,"default")));
}
@Test
public void testLast() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertEquals(bal.get(2), bal.last(du -> du.s.startsWith("h")));
try {
bal.last(du -> du.s.startsWith("d"));
Assert.fail("no error");
} catch (NoSuchElementException e) {
}
Assert.assertEquals(bal.get(2), bal.lastOrDefault(du -> du.s.startsWith("h"), new Dummy(3d,"default")));
Assert.assertEquals(new Dummy(3d,"default"), bal.lastOrDefault(du -> du.s.startsWith("d"), new Dummy(3d,"default")));
}
@Test
public void testMax() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(6d, bal.max(du -> (double)du.s.length()), 0.001d);
}
@Test
public void testMean() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(5d, bal.mean(du -> (double)du.s.length()), 0.001d);
}
@Test
public void testMin() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(4d, bal.min(du -> (double)du.s.length()), 0.001d);
}
@Test
public void testOrderBy() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello1"));
bal1.add(new Dummy(2d,"hello2"));
bal1.add(new Dummy(3d,"hello0"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello4"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.orderBy(c -> c.s);
Assert.assertNotEquals(bal1, bal2);
Assert.assertEquals(bal1.get(2), bal2.get(0));
Assert.assertEquals(bal1.get(0), bal2.get(1));
Assert.assertEquals(bal1.get(1), bal2.get(2));
Assert.assertEquals(bal1.get(4), bal2.get(3));
Assert.assertEquals(bal1.get(3), bal2.get(4));
}
@Test
public void testOrderByDescending() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello1"));
bal1.add(new Dummy(2d,"hello2"));
bal1.add(new Dummy(3d,"hello0"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello4"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.orderByDescending(c -> c.d);
Assert.assertNotEquals(bal1, bal2);
for(int i = 0; i < 5; i++)
Assert.assertEquals(bal1.get(4-i), bal2.get(i));
}
@Test
public void testReverse() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.reverse();
Assert.assertEquals(5, bal2.size());
for(int i = 0; i < 5; i++)
Assert.assertEquals(bal1.get(i), bal2.get(4-i));
}
@Test
public void testSelect() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
BetterArrayList<Double> bal2 = (BetterArrayList<Double>) bal1.<Double>select(du -> du.d);
Assert.assertEquals(5, bal2.size());
for(int i = 0; i < 5; i++)
Assert.assertEquals(bal1.get(i).d, bal2.get(i), 0.0001);
}
@Test
public void testSkip() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
Assert.assertEquals(bal1, bal1.skip(0));
Assert.assertEquals(0, bal1.skip(10).size());
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.skip(2);
Assert.assertEquals(3, bal2.size());
for(int i = 0; i < 3; i++)
Assert.assertEquals(bal1.get(i+2), bal2.get(i));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.skipWhile(du -> du.s.startsWith("h"));
Assert.assertEquals(2, bal3.size());
for(int i = 0; i < 2; i++)
Assert.assertEquals(bal1.get(i+3), bal3.get(i));
}
@Test
public void testSum() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(6d, bal.sum(du -> du.d), 0.001d);
}
@Test
public void testTake() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
Assert.assertEquals(bal1, bal1.take(10));
Assert.assertEquals(0, bal1.take(0).size());
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.take(2);
Assert.assertEquals(2, bal2.size());
for(int i = 0; i < 2; i++)
Assert.assertEquals(bal1.get(i), bal2.get(i));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.takeWhile(du -> du.s.startsWith("h"));
Assert.assertEquals(3, bal3.size());
for(int i = 0; i < 3; i++)
Assert.assertEquals(bal1.get(i), bal3.get(i));
}
@Test
public void testUnion() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<Dummy>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"test"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
BetterArrayList<Dummy> bal2 = new BetterArrayList<Dummy>();
bal2.add(new Dummy(2d,"test"));
bal2.add(new Dummy(3d,"hello"));
bal2.add(new Dummy(5d,"test"));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.union(bal2);
Assert.assertEquals(2, bal3.size());
Assert.assertEquals(bal1.get(1), bal3.get(0));
Assert.assertEquals(bal1.get(2), bal3.get(1));
}
@Test
public void testWhere() {
BetterArrayList<Dummy> bal = new BetterArrayList<Dummy>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal.where(du -> du.s.startsWith("h"));
Assert.assertEquals(2, bal2.size());
Assert.assertEquals(new Dummy(1d,"hello"), bal2.get(0));
Assert.assertEquals(new Dummy(3d,"hello"), bal2.get(1));
}
}
package fr.klemek.betterlists.test;
import java.util.ArrayList;
import java.util.NoSuchElementException;
import fr.klemek.betterlists.BetterArrayList;
import org.junit.Assert;
import org.junit.Test;
public class BetterListsTests {
protected class Dummy {
final double d;
final String s;
public Dummy(double d, String s) {
this.d = d;
this.s = s;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Dummy other = (Dummy) obj;
if (!getOuterType().equals(other.getOuterType()))
return false;
if (Double.doubleToLongBits(d) != Double.doubleToLongBits(other.d))
return false;
if (s == null && other.s != null) {
return false;
} else return s.equals(other.s);
}
private BetterListsTests getOuterType() {
return BetterListsTests.this;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + getOuterType().hashCode();
long temp;
temp = Double.doubleToLongBits(d);
result = prime * result + (int) (temp ^ (temp >>> 32));
result = prime * result + ((s == null) ? 0 : s.hashCode());
return result;
}
}
@Test
public void testAll() {
ArrayList<Dummy> al = new ArrayList<>();
al.add(new Dummy(1d,"hello"));
al.add(new Dummy(2d,"test"));
al.add(new Dummy(2d,"hello"));
BetterArrayList<Dummy> bal = BetterArrayList.fromList(al);
Assert.assertTrue(bal.all(du -> du.d > 0));
Assert.assertFalse(bal.all(du -> du.d > 1));
}
@Test
public void testAny() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertTrue(bal.any(du -> du.s.startsWith("t")));
Assert.assertFalse(bal.any(du -> du.s.startsWith("b")));
}
@Test
public void testCount() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertEquals(3, bal.count());
Assert.assertEquals(2, bal.count(du -> du.s.length() > 4));
}
@Test
public void testExclude() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"test"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
BetterArrayList<Dummy> bal2 = new BetterArrayList<>();
bal2.add(new Dummy(2d,"test"));
bal2.add(new Dummy(3d,"hello"));
bal2.add(new Dummy(5d,"test"));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.exclusion(bal2);
Assert.assertEquals(2, bal3.size());
Assert.assertEquals(bal1.get(0), bal3.get(0));
Assert.assertEquals(bal1.get(3), bal3.get(1));
}
@Test
public void testFirst() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertEquals(bal.get(0), bal.first(du -> du.s.startsWith("h")));
try {
bal.first(du -> du.s.startsWith("d"));
Assert.fail("no error");
} catch (NoSuchElementException e) {
}
Assert.assertEquals(bal.get(0), bal.firstOrDefault(du -> du.s.startsWith("h"), new Dummy(3d,"default")));
Assert.assertEquals(new Dummy(3d,"default"), bal.firstOrDefault(du -> du.s.startsWith("d"), new Dummy(3d,"default")));
}
@Test
public void testLast() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(2d,"hello"));
Assert.assertEquals(bal.get(2), bal.last(du -> du.s.startsWith("h")));
try {
bal.last(du -> du.s.startsWith("d"));
Assert.fail("no error");
} catch (NoSuchElementException e) {
}
Assert.assertEquals(bal.get(2), bal.lastOrDefault(du -> du.s.startsWith("h"), new Dummy(3d,"default")));
Assert.assertEquals(new Dummy(3d,"default"), bal.lastOrDefault(du -> du.s.startsWith("d"), new Dummy(3d,"default")));
}
@Test
public void testMax() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(6d, bal.max(du -> (double)du.s.length()), 0.001d);
}
@Test
public void testMean() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(5d, bal.mean(du -> (double)du.s.length()), 0.001d);
}
@Test
public void testMin() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(4d, bal.min(du -> (double)du.s.length()), 0.001d);
}
@Test
public void testOrderBy() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello1"));
bal1.add(new Dummy(2d,"hello2"));
bal1.add(new Dummy(3d,"hello0"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello4"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.orderBy(c -> c.s);
Assert.assertNotEquals(bal1, bal2);
Assert.assertEquals(bal1.get(2), bal2.get(0));
Assert.assertEquals(bal1.get(0), bal2.get(1));
Assert.assertEquals(bal1.get(1), bal2.get(2));
Assert.assertEquals(bal1.get(4), bal2.get(3));
Assert.assertEquals(bal1.get(3), bal2.get(4));
}
@Test
public void testOrderByDescending() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello1"));
bal1.add(new Dummy(2d,"hello2"));
bal1.add(new Dummy(3d,"hello0"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello4"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.orderByDescending(c -> c.d);
Assert.assertNotEquals(bal1, bal2);
for(int i = 0; i < 5; i++)
Assert.assertEquals(bal1.get(4-i), bal2.get(i));
}
@Test
public void testReverse() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.reverse();
Assert.assertEquals(5, bal2.size());
for(int i = 0; i < 5; i++)
Assert.assertEquals(bal1.get(i), bal2.get(4-i));
}
@Test
public void testSelect() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
BetterArrayList<Double> bal2 = (BetterArrayList<Double>) bal1.select(du -> du.d);
Assert.assertEquals(5, bal2.size());
for(int i = 0; i < 5; i++)
Assert.assertEquals(bal1.get(i).d, bal2.get(i), 0.0001);
}
@Test
public void testSkip() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
Assert.assertEquals(bal1, bal1.skip(0));
Assert.assertEquals(0, bal1.skip(10).size());
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.skip(2);
Assert.assertEquals(3, bal2.size());
for(int i = 0; i < 3; i++)
Assert.assertEquals(bal1.get(i+2), bal2.get(i));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.skipWhile(du -> du.s.startsWith("h"));
Assert.assertEquals(2, bal3.size());
for(int i = 0; i < 2; i++)
Assert.assertEquals(bal1.get(i+3), bal3.get(i));
}
@Test
public void testSum() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello2"));
Assert.assertEquals(6d, bal.sum(du -> du.d), 0.001d);
}
@Test
public void testTake() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"hello"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
bal1.add(new Dummy(5d,"hello"));
Assert.assertEquals(bal1, bal1.take(10));
Assert.assertEquals(0, bal1.take(0).size());
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal1.take(2);
Assert.assertEquals(2, bal2.size());
for(int i = 0; i < 2; i++)
Assert.assertEquals(bal1.get(i), bal2.get(i));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.takeWhile(du -> du.s.startsWith("h"));
Assert.assertEquals(3, bal3.size());
for(int i = 0; i < 3; i++)
Assert.assertEquals(bal1.get(i), bal3.get(i));
}
@Test
public void testUnion() {
BetterArrayList<Dummy> bal1 = new BetterArrayList<>();
bal1.add(new Dummy(1d,"hello"));
bal1.add(new Dummy(2d,"test"));
bal1.add(new Dummy(3d,"hello"));
bal1.add(new Dummy(4d,"test"));
BetterArrayList<Dummy> bal2 = new BetterArrayList<>();
bal2.add(new Dummy(2d,"test"));
bal2.add(new Dummy(3d,"hello"));
bal2.add(new Dummy(5d,"test"));
BetterArrayList<Dummy> bal3 = (BetterArrayList<Dummy>) bal1.union(bal2);
Assert.assertEquals(2, bal3.size());
Assert.assertEquals(bal1.get(1), bal3.get(0));
Assert.assertEquals(bal1.get(2), bal3.get(1));
}
@Test
public void testWhere() {
BetterArrayList<Dummy> bal = new BetterArrayList<>();
bal.add(new Dummy(1d,"hello"));
bal.add(new Dummy(2d,"test"));
bal.add(new Dummy(3d,"hello"));
BetterArrayList<Dummy> bal2 = (BetterArrayList<Dummy>) bal.where(du -> du.s.startsWith("h"));
Assert.assertEquals(2, bal2.size());
Assert.assertEquals(new Dummy(1d,"hello"), bal2.get(0));
Assert.assertEquals(new Dummy(3d,"hello"), bal2.get(1));
}
}