Fixed #37. Added support for toDeCamelCase function

src/main/java/strman/Strman.java

@@ -1011,6 +1011,18 @@ public abstract class Strman {
         return last(value, value.length() - 1);
     }
 
+    /**
+     * Decamelize String
+     *
+     * @param value The input String
+     * @return String decamelized.
+     */
+    public static String toDecamelize(final String value, final String chr) {
+        String camelCasedString = toCamelCase(value);
+        String[] words = camelCasedString.split("(?=\\p{Upper})");
+        return Arrays.stream(words).map(w -> w.toLowerCase()).collect(joining(Optional.ofNullable(chr).orElse(" ")));
+    }
+
     public static String decode(final String value, final int digits, final int radix) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         return Arrays

src/test/java/strman/StrmanTest.java

@@ -740,4 +740,10 @@ public class StrmanTest {
 
         assertThat(toCamelCase("c"), equalTo("c"));
     }
+
+    @Test
+    public void toDeCamelCase_shouldDeCamelCaseAString() throws Exception {
+        assertThat(toDecamelize("camelCase", null), equalTo("camel case"));
+        assertThat(toDecamelize("camelCase", "_"), equalTo("camel_case"));
+    }
 }