isNumeric method added and tested

Author: coa

README.md

@@ -234,6 +234,15 @@ Checks whether array has any associative keys.
 ```php
 SimpleArrayLibrary::isAssociative(array('a' => 1, array(1))); // true
 SimpleArrayLibrary::isAssociative(array(1, 1)); // false
+SimpleArrayLibrary::isAssociative(array()); // false
+```
+isNumeric
+------------------------------
+Checks whether array has all numeric keys starting with zero and progressing by one for each new element.
+```php
+SimpleArrayLibrary::isNumeric(array('a' => 1, array(1))); // false
+SimpleArrayLibrary::isNumeric(array(1, 1)); // true
+SimpleArrayLibrary::isNumeric(array()); // false
 ```
 isSubArray
 ------------------------------

changelog.md

@@ -1,3 +1,6 @@
+4.1.0
+==============================
+isNumeric method added
 4.0.0
 ==============================
 saveField method now accepts 0 and '0' as valid values for id parameter and no longer throws an exception if either of those values is passed
@@ -14,13 +17,11 @@ selectRandomArrayElements method added
 ==============================
 haveSameKeys & haveSameValues methods added, they will replace haveEqualKeys & haveEqualValues respectively, which are depricated.
 hasOnlyKeys method added & tested
-
 2.0.0
 ==============================
 CastColumns method allows for empty $matrix input, without throwing an exception.
 Tests code coverage improved to 100%.
 Changelog file added.
-
 1.1.0
 ==============================
-Delete columns method added.
+Delete columns method added.