Q: 19
What is the output of the following code? class Number { private $v = 0; public function __construct($v) { $this->v = $v; } public function mul() { return function ($x) { return $this->v * $x; }; } } $one = new Number(1); $two = new Number(2); $double = $two->mul()->bindTo($one); echo $double(5);
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