chore: update the version picker to use the currently running verison. (angular#482)

Author: josephperrott

src/app/shared/version-picker/version-picker.ts

@@ -8,16 +8,14 @@ import {docVersions, materialVersion, VersionInfo} from '../version/version';
   templateUrl: './version-picker.html'
 })
 export class VersionPicker {
-
-  _versionRegex = /\d+.\d+.\d+/;
-  docVersions = docVersions;
-
+  /** The currently running versin of Material. */
   materialVersion = materialVersion;
+  /** The possible versions of the doc site. */
+  docVersions = docVersions;
 
-  displayVersion = materialVersion.match(this._versionRegex)[0];
-
+  /** Updates the window location if the selected version is a different version. */
   onVersionChanged(version: VersionInfo) {
-    if (version.title.match(this._versionRegex)[0] !== this.displayVersion) {
+    if (!version.url.startsWith(window.location.href)) {
       window.location.assign(version.url);
     }
   }

src/app/shared/version/version.ts

@@ -10,14 +10,13 @@ export interface VersionInfo {
 }
 
 /** Doc site versions. We update the urls and titles manually */
-// TODO(tinayuangao): Update the title with actual versions
 export const docVersions: VersionInfo[] = [
   {
     url: 'https://v5.material.angular.io/',
     title: '5.2.4'
   },
   {
-    url: `http://material.angular.io`,
-    title: '6.0.0'
+    url: `https://material.angular.io/`,
+    title: materialVersion
   }
 ];