jancassio · May 16, 2016 18:28
diff --git a/Dispatcher.js b/Dispatcher.js
 /**
 * Dispatcher
 * Author: Jan Cassio <[email protected]>
 * 
 * A small event dispacher helper for general usage.
 */ 
 var Dispatcher = {
    events: {},
    /**
     * Emit an event that can be handled by subscribed handlers.
     * 
     * @param event    An event type identifier.
     * @param payload  An object that can be sent to event handlers and.
     * 
     * @return  A boolean flag that notify if the event was sent to any handler (`true`) or not (`false`).
     * 
     */
    emit: function (event, payload) {
      var listeners = this.events[ event ];
      if (listeners) {
        for (var i = listeners.length - 1; i >= 0; i--) {
          var listener = listeners[ i ];
          listener.callback.call(listener.scope, {type: event, payload: payload})
        };
        return true;
      }
      return false;
    },

    /**
     * Subscribe a callback for given event type.
     * 
     * @param event      The type of event to be handled.
     * @param callback   The function that receive event when the event be emited.
     * @param scope      The `this` scope inside callback (not required).
     * 
     */ 
    on: function (event, callback, scope) {
      var listeners = this.events[ event ];
      if ( !listeners ) {
        listeners = []
      }
      
      listeners[ listeners.length ] = {callback: callback, scope: scope || this}
      this.events[ event ] = listeners;
    },

    // 
    /**
     * Unsubscribe a event previously added.
     * 
     * @param event     The event type associated to a callback to be unsubscribed.
     * @param callback  The callback to be unsubscribed.
     * 
     */ 
    off: function (event, callback) {
      var listeners = this.events[ event ];
      
      if ( listeners ) {
        for (var i = listeners.length - 1; i >= 0; i--) {
          var listener = listeners[i]

          if( listener.callback === callback ) {
            listeners.splice(i, 1)
            break;
          }
        }

        if( !listeners.length ) {
          this.events[ event ] = undefined;
        }
      }
    }
  }
diff --git a/Usage.md b/Usage.md
	/**
	* Dispatcher
	* Author: Jan Cassio <[email protected]>
	*
	* A small event dispacher helper for general usage.
	*/
	var Dispatcher = {
	events: {},
	/**
	* Emit an event that can be handled by subscribed handlers.
	*
	* @param event An event type identifier.
	* @param payload An object that can be sent to event handlers and.
	*
	* @return A boolean flag that notify if the event was sent to any handler (`true`) or not (`false`).
	*
	*/
	emit: function (event, payload) {
	var listeners = this.events[ event ];
	if (listeners) {
	for (var i = listeners.length - 1; i >= 0; i--) {
	var listener = listeners[ i ];
	listener.callback.call(listener.scope, {type: event, payload: payload})
	};
	return true;
	}
	return false;
	},

	/**
	* Subscribe a callback for given event type.
	*
	* @param event The type of event to be handled.
	* @param callback The function that receive event when the event be emited.
	* @param scope The `this` scope inside callback (not required).
	*
	*/
	on: function (event, callback, scope) {
	var listeners = this.events[ event ];
	if ( !listeners ) {
	listeners = []
	}

	listeners[ listeners.length ] = {callback: callback, scope: scope \|\| this}
	this.events[ event ] = listeners;
	},

	//
	/**
	* Unsubscribe a event previously added.
	*
	* @param event The event type associated to a callback to be unsubscribed.
	* @param callback The callback to be unsubscribed.
	*
	*/
	off: function (event, callback) {
	var listeners = this.events[ event ];

	if ( listeners ) {
	for (var i = listeners.length - 1; i >= 0; i--) {
	var listener = listeners[i]

	if( listener.callback === callback ) {
	listeners.splice(i, 1)
	break;
	}
	}

	if( !listeners.length ) {
	this.events[ event ] = undefined;
	}
	}
	}
	}
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