add static method fromIterable

Author: doganoo

src/Datastructure/Table/HashTable.php

@@ -372,6 +372,20 @@ public function toArray(): array {
         return $array;
     }
 
+    /**
+     * @param iterable $iterable
+     * @return HashTable
+     * @throws InvalidKeyTypeException
+     * @throws UnsupportedKeyTypeException
+     */
+    public static function fromIterable(iterable $iterable): HashTable {
+        $hashTable = new HashTable();
+        foreach ($iterable as $key => $value) {
+            $hashTable->put($key, $value);
+        }
+        return $hashTable;
+    }
+
     /**
      * basic implementation of Java-like keySet().
      * The method returns an array containing the node keys.

tests/Table/HashTableTest.php

@@ -27,6 +27,7 @@
 namespace doganoo\PHPAlgorithmsTest\Table;
 
 use doganoo\PHPAlgorithms\Common\Interfaces\IHashable;
+use doganoo\PHPAlgorithms\Datastructure\Lists\ArrayList\ArrayList;
 use doganoo\PHPAlgorithms\Datastructure\Table\HashTable;
 use doganoo\PHPAlgorithmsTest\Table\Entity\HashableObject;
 use doganoo\PHPAlgorithmsTest\Util\HashTableUtil;
@@ -145,6 +146,35 @@ public function testKeyTypes(): void {
         $this->assertTrue($added);
     }
 
+    /**
+     * tests adding different key types to the map
+     */
+    public function testFromIterable(): void {
+        $array     = [1, 2, 3];
+        $hashTable = HashTable::fromIterable($array);
+
+        $this->assertTrue($hashTable->size() === 3);
+        $this->assertTrue($hashTable->get(0) === 1);
+        $this->assertTrue($hashTable->get(1) === 2);
+        $this->assertTrue($hashTable->get(2) === 3);
+    }
+
+    /**
+     * tests adding different key types to the map
+     */
+    public function testFromIterableArrayList(): void {
+        $arrayList = new ArrayList();
+        $arrayList->add(1);
+        $arrayList->add(2);
+        $arrayList->add(3);
+        $hashTable = HashTable::fromIterable($arrayList);
+
+        $this->assertTrue($hashTable->size() === 3);
+        $this->assertTrue($hashTable->get(0) === 1);
+        $this->assertTrue($hashTable->get(1) === 2);
+        $this->assertTrue($hashTable->get(2) === 3);
+    }
+
     /**
      * tests retrieving all keys from the map
      */