Implement playlist

.gitignore

@@ -6,6 +6,10 @@
 .idea/**/tasks.xml
 .idea/dictionaries
 
+target/
+.idea/
+*.iml
+
 # Sensitive or high-churn files:
 .idea/**/dataSources/
 .idea/**/dataSources.ids
@@ -46,4 +50,4 @@ atlassian-ide-plugin.xml
 com_crashlytics_export_strings.xml
 crashlytics.properties
 crashlytics-build.properties
-fabric.properties
+fabric.properties

pom.xml

@@ -8,6 +8,10 @@
     <artifactId>PlaylistChallenge</artifactId>
     <version>1.0-SNAPSHOT</version>
 
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
 
     <dependencies>
         <dependency>

src/main/java/io/zipcoder/Music.java

@@ -9,6 +9,24 @@ public Music(String[] playList){
     }
 
     public Integer selection(Integer startIndex, String selection){
-        return null;
+
+        int count = 0;
+        for (int i = startIndex; !playList[i].equals(selection); i++) {
+            if(i == playList.length - 1) {
+                i = -1;
+            }
+            count++;
+        }
+
+        int revCount = 0;
+        for (int i = startIndex; !playList[i].equals(selection); i--) {
+            if(i == 0) {
+                i = playList.length;
+            }
+            revCount++;
+        }
+
+        if(count < revCount) { return count; }
+        else { return revCount; }
     }
 }