DropWhile TakeWhile examples

Author: aNNiMON

app/src/main/java/com/annimon/java8streamexample/MainActivity.java

@@ -128,6 +128,14 @@ private void action(String action) {
             case "limit %N":
                 stream = stream.limit(filterValue);
                 break;
+            case "drop while %N":
+                // Drop while word length < N
+                stream = stream.dropWhile(p -> p.getWord().length() < filterValue);
+                break;
+            case "take while %N":
+                // Take while word length < N
+                stream = stream.takeWhile(p -> p.getWord().length() < filterValue);
+                break;
             case "group":
                 // Show 5 words by each group
                 stream = IntStream.range('a', 'z'+1)

app/src/main/res/values/strings.xml

@@ -19,6 +19,8 @@
         <item>Add index with custom operator</item>
         <item>Skip first N rows</item>
         <item>Limit N rows</item>
+        <item>Drop while length &lt; N</item>
+        <item>Take while length &lt; N</item>
         <item>Group by first character</item>
         <item>Group by first character 2</item>
         <item>Sort by translate</item>
@@ -36,6 +38,8 @@
         <item>add index custom op</item>
         <item>skip %N</item>
         <item>limit %N</item>
+        <item>drop while %N</item>
+        <item>take while %N</item>
         <item>group</item>
         <item>group by</item>
         <item>sort by</item>