public function test_head()
{
$array = [1, 2, 3, 4];
$this->assertEquals(1, F\head($array));
$this->assertEquals('H', F\head('Hello'));
$this->assertEquals(7, F\head([7]));
$this->assertNull(F\head([]));
$this->assertEquals('', F\head(''));
}
/**
* Transforms a string to syntax.
*
* @param string $text the string to parse
* @return Tarsana\Syntax\Syntax
*/
protected function doParse($text)
{
$txt = $text;
if (F\head($text) == '[' && F\last($text) == ']') {
$txt = F\init(F\tail($text));
}
if ($this->isObject($txt)) {
return $this->parseObject($text);
}
if ($this->isArray($txt)) {
return $this->parseArray($text);
}
if ($this->isNumber($txt)) {
return $this->parseNumber($text);
}
if ($this->isBoolean($txt)) {
return $this->parseBoolean($text);
}
if ($this->isString($txt)) {
return $this->parseString($text);
}
return null;
}