Gave array a constructor that takes an initial size parameter

dlib/array/array_kernel.h

@@ -89,6 +89,19 @@ namespace dlib
             _at_start(true)
         {}
 
+        explicit array (
+            unsigned long new_size
+        ) :
+            array_size(0),
+            max_array_size(0),
+            array_elements(0),
+            pos(0),
+            last_pos(0),
+            _at_start(true)
+        {
+            resize(new_size);
+        }
+
         ~array (
         ); 
 

dlib/array/array_kernel_abstract.h

@@ -64,6 +64,19 @@ namespace dlib
                     - std::bad_alloc or any exception thrown by T's constructor
             !*/
 
+            explicit array (
+                unsigned long new_size
+            );
+            /*!
+                ensures 
+                    - #*this is properly initialized
+                    - #size() == new_size
+                    - #max_size() == new_size
+                    - All elements of the array will have initial values for their type.
+                throws
+                    - std::bad_alloc or any exception thrown by T's constructor
+            !*/
+
             ~array (
             ); 
             /*!

dlib/test/array.cpp

@@ -41,6 +41,11 @@ namespace
 
         array a1, a2;
 
+        {
+            array a4(4);
+            DLIB_TEST(a4.size() == 4);
+        }
+
         {
             array a1, a2;