Added lastChar and firstChar methods.

Author: Martin Brecht-Precht

src/StringBuilder.php

@@ -261,6 +261,26 @@ public function charAt($position)
 		return mb_substr($this->string, $position, 1);
 	}
 
+	/**
+	 * Returns first character
+	 *
+	 * @return string
+	 */
+	public function firstChar()
+	{
+		return mb_substr($this->string, 0, 1);
+	}
+
+	/**
+	 * Returns last character
+	 *
+	 * @return string
+	 */
+	public function lastChar()
+	{
+		return mb_substr($this->string, -1);
+	}
+
 	/**
 	 * Returns an substring defined by startPosition and length
 	 *

test/StringBuilderTest.php

@@ -39,6 +39,8 @@ public function testBuilder()
 		$this->assertEquals(9, $builder->lastIndexOf('e'));
 		$this->assertNull($builder->lastIndexOf('e',10));
 		$this->assertTrue($builder->contains('21b'));
+		$this->assertEquals('b', $builder->firstChar());
+		$this->assertEquals('ö', $builder->lastChar());
 		$this->assertFalse($builder->contains('abc'));
 		$this->assertEquals('öeb1212ewqb', $builder->reverse()->build());
 		$builder = new StringBuilder('0123456');