- Added the HAVING and TRUNCATE keyword

- Fixed GroupBy which was not implemented yet
- Added a new SQL raw() function
- From statement now accepts subqueries

src/EntityCollection.php

@@ -6,6 +6,8 @@ use Generator;
 
 class EntityCollection extends \ArrayObject {
     
+    public ? string $entityClass = null;
+    
     public function filters(Callable $callback) : Generator
     {
         $idx = 0;
@@ -29,6 +31,17 @@ class EntityCollection extends \ArrayObject {
         
         return $collection;
     }
+        
+    public function iterate(Callable $callback) : array
+    {
+        $results = [];
+        
+        foreach($this as $item) {
+            $results[] = $callback($item);
+        }
+        
+        return $results;
+    }
     
     public function removeOne($value, string $field, bool $strict = true) : ? object
     {
@@ -72,6 +85,17 @@ class EntityCollection extends \ArrayObject {
         }
     }
     
+    public function column($field) : array
+    {
+        $list = [];
+        
+        foreach($this as $item) {
+            $list[] = $item->$field;
+        }
+        
+        return $list;
+    }
+    
     public function buildArray(string $keyColumn, /* string|callable|null */ $value = null) : array
     {
         $list = [];
@@ -107,4 +131,30 @@ class EntityCollection extends \ArrayObject {
         
         return $list;
     }
+    
+    public function fromArray(array $datasets, ? string $entityClass = null) : self 
+    {
+        if ( ! ($this->entityClass || $entityClass) ) {
+            throw new \Exception("An entity class name must be provided to be instanciated and populated before insertion into this collection.");
+        }
+        
+        $className = $entityClass ?: $this->entityClass;
+        
+        foreach($datasets as $dataset) {
+            $this->append( (new $className() )->fromArray($dataset) );
+        }
+        
+        return $this;
+    }
+    
+    public function mergeWith( /*array|EntityCollection*/ $datasets ) : self
+    {
+        if ( is_object($datasets) ) {
+            $datasets = $datasets->getArrayCopy();
+        }
+        
+        $this->exchangeArray( array_merge( $this->getArrayCopy(), $datasets ) );
+        
+        return $this;
+    }
 }