Notepad:PHP Test - Revision history

Lax at 21:13, 22 May 2015

2015-05-22T21:13:33Z

@@ Line 21: / Line 21: @@
 class EventEmitter {
-    var $current_callback;
+     public function emit() {}
-    public function emit($description , $data) {
+     public function subscribe() {}
+}

Lax at 21:07, 22 May 2015

2015-05-22T21:07:19Z

← Older revision		Revision as of 21:07, 22 May 2015
Line 1:		Line 1:
	<pre class="prettyprint">		<pre class="prettyprint">
	<?php		<?php

	/**		/**
	* Event Bus Challenge		* Event Bus Challenge
	*		*
Line 20:		Line 20:
	*/		*/

	class EventEmitter {		class EventEmitter {

	var $current_callback;		var $current_callback;
Line 41:		Line 41:
	public function subscribe($description, $callback_func_name) {		public function subscribe($description, $callback_func_name) {
	// callback function specified.		// callback function specified.
	// add to ~~arrat~~		// add to array
	if (empty($this->current_callback[$description])) {		if (empty($this->current_callback[$description])) {
	$this->current_callback[$description] = array();		$this->current_callback[$description] = array();
Line 50:		Line 50:
	}		}

	$emitter = new EventEmitter;		$emitter = new EventEmitter;

	$error_callback = function($data) {		$error_callback = function($data) {
	echo "Error 1. {$data["message"]} \n";		echo "Error 1. {$data["message"]} \n";
	};		};

	$error_callback2 = function($data) {		$error_callback2 = function($data) {
	echo "Error 2. {$data["message"]} \n";		echo "Error 2. {$data["message"]} \n";
	};		};

	$success_callback = function($data) {		$success_callback = function($data) {
	echo "SUCCESS! {$data["message"]} \n";		echo "SUCCESS! {$data["message"]} \n";
	};		};

	$emitter->emit("error", ["message" => "Error one."]);		$emitter->emit("error", ["message" => "Error one."]);

	$emitter->subscribe("error", $error_callback);		$emitter->subscribe("error", $error_callback);
	$emitter->emit("error", ["message" => "Second error."]);		$emitter->emit("error", ["message" => "Second error."]);

	$emitter->subscribe("error", $error_callback2);		$emitter->subscribe("error", $error_callback2);
	$emitter->emit("error", ["message" => "Yet another error."]);		$emitter->emit("error", ["message" => "Yet another error."]);

	$emitter->subscribe("success", $success_callback);		$emitter->subscribe("success", $success_callback);
	$emitter->emit("success", ["message" => "Great success!."]);		$emitter->emit("success", ["message" => "Great success!."]);

	// Expected output:		// Expected output:

	// Error 1. Second error.		// Error 1. Second error.
	// Error 1. Yet another error.		// Error 1. Yet another error.
	// Error 2. Yet another error.		// Error 2. Yet another error.
	// SUCCESS! Great success!		// SUCCESS! Great success!
	</pre>		</pre>

Lax at 21:06, 22 May 2015

2015-05-22T21:06:34Z

← Older revision		Revision as of 21:06, 22 May 2015
Line 1:		Line 1:
			<pre class="prettyprint">
	<?php		<?php

Line 80:		Line 81:
	// Error 2. Yet another error.		// Error 2. Yet another error.
	// SUCCESS! Great success!		// SUCCESS! Great success!
			</pre>

Lax at 20:46, 22 May 2015

2015-05-22T20:46:04Z

← Older revision		Revision as of 20:46, 22 May 2015
Line 1:		Line 1:
	<?php		<?php

	/**		/**
	* Event Bus Challenge		* Event Bus Challenge
	*		*
Line 19:		Line 19:
	*/		*/

	class EventEmitter {		class EventEmitter {

	var $current_callback;		var $current_callback;
Line 49:		Line 49:
	}		}

	$emitter = new EventEmitter;		$emitter = new EventEmitter;

	$error_callback = function($data) {		$error_callback = function($data) {
	echo "Error 1. {$data["message"]} \n";		echo "Error 1. {$data["message"]} \n";
	};		};

	$error_callback2 = function($data) {		$error_callback2 = function($data) {
	echo "Error 2. {$data["message"]} \n";		echo "Error 2. {$data["message"]} \n";
	};		};

	$success_callback = function($data) {		$success_callback = function($data) {
	echo "SUCCESS! {$data["message"]} \n";		echo "SUCCESS! {$data["message"]} \n";
	};		};

	$emitter->emit("error", ["message" => "Error one."]);		$emitter->emit("error", ["message" => "Error one."]);

	$emitter->subscribe("error", $error_callback);		$emitter->subscribe("error", $error_callback);
	$emitter->emit("error", ["message" => "Second error."]);		$emitter->emit("error", ["message" => "Second error."]);

	$emitter->subscribe("error", $error_callback2);		$emitter->subscribe("error", $error_callback2);
	$emitter->emit("error", ["message" => "Yet another error."]);		$emitter->emit("error", ["message" => "Yet another error."]);

	$emitter->subscribe("success", $success_callback);		$emitter->subscribe("success", $success_callback);
	$emitter->emit("success", ["message" => "Great success!."]);		$emitter->emit("success", ["message" => "Great success!."]);

	// Expected output:		// Expected output:

	// Error 1. Second error.		// Error 1. Second error.
	// Error 1. Yet another error.		// Error 1. Yet another error.
	// Error 2. Yet another error.		// Error 2. Yet another error.
	// SUCCESS! Great success!		// SUCCESS! Great success!

Lax: Created page with "
2015-05-22T20:45:20Z

Created page with "<?php /** * Event Bus Challenge * * FIRST: COPY/PASTE ALL THIS CODE IN THE TEXTFIELD BELOW AND EDIT IT THERE * * 1. The goal is to build a very simple PubSub/event cla..."

New page
<?php

/**
* Event Bus Challenge
*
* FIRST: COPY/PASTE ALL THIS CODE IN THE TEXTFIELD BELOW AND EDIT IT THERE
*
* 1. The goal is to build a very simple PubSub/event class in PHP.
* We will create an EventEmitter object and then we'll subscribe to events and trigger them.
* Subscribing to an event simply adds a callback to be run when the event is triggered.
* Triggering an event (emit) should run all the attached callbacks.
* 2. Don't overthink it. The solution should only take a few minutes and a few lines of code.
* Build only what you need to get the desired ouput.
*
* Constraints:
* 1. Although we only use error/success events, please build the class to handle arbitrary events.
* 2. Events data will always be an associative array.
* 3. A callback should always be safe to call.
*/

class EventEmitter {

var $current_callback;

public function __construct() {
// no special needs I can see
$this->current_callback = array();
}

public function emit($description , $data) {
// emit an message using previsouly subscribed function
// loop through all the previous functions.
if (!empty($this->current_callback[$description])) {
foreach ($this->current_callback[$description] as $current) {
call_user_func($current, $data);
}
}
}

public function subscribe($description, $callback_func_name) {
// callback function specified.
// add to arrat
if (empty($this->current_callback[$description])) {
$this->current_callback[$description] = array();
}
$this->current_callback[$description][] = $callback_func_name;
}

}

$emitter = new EventEmitter;

$error_callback = function($data) {
echo "Error 1. {$data["message"]} \n";
};

$error_callback2 = function($data) {
echo "Error 2. {$data["message"]} \n";
};

$success_callback = function($data) {
echo "SUCCESS! {$data["message"]} \n";
};

$emitter->emit("error", ["message" => "Error one."]);

$emitter->subscribe("error", $error_callback);
$emitter->emit("error", ["message" => "Second error."]);

$emitter->subscribe("error", $error_callback2);
$emitter->emit("error", ["message" => "Yet another error."]);

$emitter->subscribe("success", $success_callback);
$emitter->emit("success", ["message" => "Great success!."]);

// Expected output:

// Error 1. Second error.
// Error 1. Yet another error.
// Error 2. Yet another error.
// SUCCESS! Great success!