task 7

README.md

@@ -1,6 +1,5 @@
 # PPJ
 
-This repository exists to archive PJATK tasks for the PPJ curriculum.
+This branch contains the solution for the **7th task**.
 
-Each task can be found under its **corresponding branch**: `task/n`.  
+[Go back to main](/femsci/ppj/src/branch/nya)
-Example: `task/2`.

dev/meowmeow/Book.java

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+/*
+ * TASK 7
+ * archived at https://git.femboy.science/femsci/ppj/src/branch/task/7
+ * by femsci
+ */
+
+package dev.meowmeow;
+
+public class Book {
+    public Book(String author, String title, String body) {
+        this.author = author;
+        this.title = title;
+        this.body = body;
+    }
+
+    private final String author, title, body;
+
+    public String getBody() {
+        return body;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+}

dev/meowmeow/Library.java

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+/*
+ * TASK 7
+ * archived at https://git.femboy.science/femsci/ppj/src/branch/task/7
+ * by femsci
+ */
+
+package dev.meowmeow;
+
+import java.util.Arrays;
+
+public class Library {
+    public Library(Shelf[] shelves) {
+        this.shelves = shelves;
+    }
+
+    private final Shelf[] shelves;
+
+    public Shelf[] getShelves() {
+        return shelves;
+    }
+
+    public int countAuthor(String author) {
+        return (int) Arrays.asList(shelves).stream().flatMap(x -> Arrays.stream(x.getBooks()))
+                .filter(f -> f.getAuthor().equals(author)).count();
+    }
+}

dev/meowmeow/Nyaaaaaa.java

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+/*
+ * TASK 7
+ * archived at https://git.femboy.science/femsci/ppj/src/branch/task/7
+ * by femsci
+ */
+
+package dev.meowmeow;
+
+public class Nyaaaaaa {
+
+    public static void main(String[] args) {
+        Shelf sh1 = new Shelf("Shelf1",
+                new Book[] {
+                        new Book("Babel", "Odessa Tales", "babelode"),
+                        new Book("Joyce", "Ulisses", "joyceuli")
+                });
+
+        Shelf sh2 = new Shelf("Shelf2",
+                new Book[] {
+                        new Book("Mann", "Dr Faustus", "mannfau"),
+                        new Book("Babel", "Red Cavalry", "babelred")
+                });
+
+        Library lib = new Library(new Shelf[] { sh1, sh2 });
+
+        System.out.printf("# of books by this author: %d\n",
+                lib.countAuthor("Babel"));
+    }
+}

dev/meowmeow/Shelf.java

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+/*
+ * TASK 7
+ * archived at https://git.femboy.science/femsci/ppj/src/branch/task/7
+ * by femsci
+ */
+
+package dev.meowmeow;
+
+//final class :3c
+public class Shelf {
+    public Shelf(String id, Book[] books) {
+        this.id = id;
+        this.books = books;
+    }
+
+    private final String id;
+    private final Book[] books;
+
+    public String getId() {
+        return id;
+    }
+
+    public Book[] getBooks() {
+        return books;
+    }
+}