From 0aa874fa933d73a53f597cd6298d6d90df47b4ee Mon Sep 17 00:00:00 2001
From: Shekhar Gulati <shekhargulati84@gmail.com>
Date: Sat, 21 May 2016 18:38:18 +0530
Subject: [PATCH] Fixed #18. Added support for `removeEmptyStrings` function

---
 src/main/java/strman/Strman.java     | 13 +++++++++++++
 src/test/java/strman/StrmanTest.java |  6 ++++++
 2 files changed, 19 insertions(+)

diff --git a/src/main/java/strman/Strman.java b/src/main/java/strman/Strman.java
index f8e9a1e..87b8fa5 100644
--- a/src/main/java/strman/Strman.java
+++ b/src/main/java/strman/Strman.java
@@ -654,6 +654,19 @@ public abstract class Strman {
         return joiner.toString() + value;
     }
 
+    /**
+     * Remove empty Strings from string array
+     *
+     * @param strings Array of String to be cleaned
+     * @return Array of String without empty Strings
+     */
+    public static String[] removeEmptyStrings(String[] strings) {
+        if (Objects.isNull(strings)) {
+            throw new IllegalArgumentException("Input array should not be null");
+        }
+        return Arrays.stream(strings).filter(str -> str != null && !str.trim().isEmpty()).toArray(String[]::new);
+    }
+
     public static String decode(final String value, final int digits, final int radix) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         return Arrays
diff --git a/src/test/java/strman/StrmanTest.java b/src/test/java/strman/StrmanTest.java
index 0a39540..fe9a277 100644
--- a/src/test/java/strman/StrmanTest.java
+++ b/src/test/java/strman/StrmanTest.java
@@ -9,6 +9,7 @@ import static java.util.stream.Collectors.toList;
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.hasItems;
 import static org.hamcrest.collection.IsArrayContainingInOrder.arrayContaining;
+import static org.hamcrest.collection.IsArrayWithSize.emptyArray;
 import static org.junit.Assert.*;
 import static strman.Strman.*;
 import static strman.Strman.format;
@@ -498,4 +499,9 @@ public class StrmanTest {
         assertThat(prependArray("bar", new String[]{"foo"}), equalTo("foobar"));
     }
 
+    @Test
+    public void removeEmptyStrings_shouldRemoveEmptyStrings() throws Exception {
+        assertThat(removeEmptyStrings(new String[]{"aa", "", "   ", "bb", "cc", null}), arrayContaining("aa", "bb", "cc"));
+        assertThat(removeEmptyStrings(new String[0]), emptyArray());
+    }
 }
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