Get rid of extra style arrays in examples

examples/layer-z-index.js

@@ -13,7 +13,7 @@ goog.require('ol.style.Style');
 var stroke = new ol.style.Stroke({color: 'black', width: 1});
 
 var styles = {
-  'square': [new ol.style.Style({
+  'square': new ol.style.Style({
     image: new ol.style.RegularShape({
       fill: new ol.style.Fill({color: 'blue'}),
       stroke: stroke,
@@ -21,8 +21,8 @@ var styles = {
       radius: 80,
       angle: Math.PI / 4
     })
-  })],
-  'triangle': [new ol.style.Style({
+  }),
+  'triangle': new ol.style.Style({
     image: new ol.style.RegularShape({
       fill: new ol.style.Fill({color: 'red'}),
       stroke: stroke,
@@ -31,8 +31,8 @@ var styles = {
       rotation: Math.PI / 4,
       angle: 0
     })
-  })],
-  'star': [new ol.style.Style({
+  }),
+  'star': new ol.style.Style({
     image: new ol.style.RegularShape({
       fill: new ol.style.Fill({color: 'green'}),
       stroke: stroke,
@@ -41,13 +41,13 @@ var styles = {
       radius2: 4,
       angle: 0
     })
-  })]
+  })
 };
 
 
-function createLayer(coordinates, styles, zIndex) {
+function createLayer(coordinates, style, zIndex) {
   var feature = new ol.Feature(new ol.geom.Point(coordinates));
-  feature.setStyle(styles);
+  feature.setStyle(style);
 
   var source = new ol.source.Vector({
     features: [feature]