DataSourceCollection.js in cesium-0.20.0

- old
+ new

@@ -1,8 +1,9 @@
 /*global define*/
-define(['Core/DeveloperError', 'Core/destroyObject', 'Core/Event'], function(
+define(['Core/DeveloperError', 'Core/defined', 'Core/destroyObject', 'Core/Event'], function(
         DeveloperError,
+        defined,
         destroyObject,
         Event) {
     "use strict";
 
     /**
@@ -35,11 +36,11 @@
      * @param {DataSource} dataSource The data source to add.
      *
      * @exception {DeveloperError} dataSource is required.
      */
     DataSourceCollection.prototype.add = function(dataSource) {
-        if (typeof dataSource === 'undefined') {
+        if (!defined(dataSource)) {
             throw new DeveloperError('dataSource is required.');
         }
         this._dataSources.push(dataSource);
         this.dataSourceAdded.raiseEvent(this, dataSource);
     };
@@ -120,11 +121,11 @@
      *
      * @exception {DeveloperError} index is required.
      * @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
      */
     DataSourceCollection.prototype.get = function(index) {
-        if (typeof index === 'undefined') {
+        if (!defined(index)) {
             throw new DeveloperError('index is required.');
         }
 
         return this._dataSources[index];
     };
@@ -146,11 +147,11 @@
      * If this object was destroyed, it should not be used; calling any function other than
      * <code>isDestroyed</code> will result in a {@link DeveloperError} exception.
      *
      * @memberof DataSourceCollection
      *
-     * @return {Boolean} true if this object was destroyed; otherwise, false.
+     * @returns {Boolean} true if this object was destroyed; otherwise, false.
      *
      * @see DataSourceCollection#destroy
      */
     DataSourceCollection.prototype.isDestroyed = function() {
         return false;
@@ -165,10 +166,10 @@
      * <code>isDestroyed</code> will result in a {@link DeveloperError} exception.  Therefore,
      * assign the return value (<code>undefined</code>) to the object as done in the example.
      *
      * @memberof DataSourceCollection
      *
-     * @return {undefined}
+     * @returns {undefined}
      *
      * @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
      *
      * @see DataSourceCollection#isDestroyed
      *
\ No newline at end of file