scratch
| /vendor/fusonic/linq/examples/6-typesafe.php |
|---|
| @@ -0,0 +1,27 @@ |
| <?php |
| /* |
| * One important design goal was the principle of the least surprise. |
| * As PHP is a fully dynamic language with nearly no type-safety, it is common to shoot yourself into the foot because of accidentally mixing up incompatible types. |
| * We protect you from these programing errors by asserting that every callback functions you supply to the library must return a correctly typed value. |
| * In addition, every supported aggregate function will throw an exception if you are accidentally mixing up incompatible types. |
| * |
| * This means that we made this library totally predictable in what it does, and verified that every function has its defined exceptions |
| * which are thrown when certain operations fail, or if certain types are not correct. |
| * |
| */ |
| echo "<pre>"; |
| require_once __DIR__ . '/../vendor/autoload.php'; // Autoload files using Composer autoload |
| use Fusonic\Linq\Linq; |
| /* Throws an UnexpectedValueException if the |
| provided callback function does not return a boolean */ |
| Linq::from(array("1", "1")) |
| ->where(function($x) { return "NOT A BOOLEAN"; }); |
| /* Throws an UnexpectedValueException if one of the values |
| is not convertible to a numeric value:*/ |
| Linq::from(array(1, 2, "Not a numeric value")) |
| ->sum(); |