Refactor the object keys counter function

src/jquery.uls.core.js

@@ -53,6 +53,34 @@
 		</div>';
 	/*jshint multistr:false */
 
+	$.uls = $.uls || {};
+
+	$.uls.utils = {};
+
+	/**
+	 * Count the number of keys in an object.
+	 * Works in a cross-browser way.
+	 * @param {Object} The object.
+	 */
+	$.uls.utils.objectLength = function ( obj ) {
+		var count, key;
+
+		// Some old browsers don't support Object.keys
+		if ( Object.keys ) {
+			return Object.keys( obj ).length;
+		}
+
+		count = 0;
+
+		for ( key in obj ) {
+			if ( Object.prototype.hasOwnProperty.call( obj, key ) ) {
+				count++;
+			}
+		}
+
+		return count;
+	};
+
 	/**
 	 * ULS Public class definition
 	 */
@@ -354,26 +382,13 @@
 		 * @return string
 		 */
 		getMenuWidth: function () {
-			var language,
-				languagesCount = 0;
+			var languagesCount;
 
 			if ( this.options.menuWidth ) {
 				return this.options.menuWidth;
 			}
 
-			// IE8 does not support Object.keys
-			if ( Object.keys ) {
-				languagesCount = Object.keys( this.options.languages ).length;
-			} else {
-				for ( language in this.options.languages ) {
-					if ( Object.prototype.hasOwnProperty.call(
-						this.options.languages,
-						language
-					) ) {
-						languagesCount++;
-					}
-				}
-			}
+			languagesCount = $.uls.utils.objectLength( this.options.languages );
 
 			if ( languagesCount < 12 ) {
 				return 'narrow';

src/jquery.uls.lcd.js

@@ -115,8 +115,7 @@
 
 		render: function () {
 			var $section,
-				language,
-				languagesCount = 0,
+				languagesCount,
 				lcd = this,
 				regions = [],
 				regionNames = {
@@ -131,19 +130,7 @@
 					PA: 'Pacific'
 				};
 
-			// IE8 does not support Object.keys
-			if ( Object.keys ) {
-				languagesCount = Object.keys( this.options.languages ).length;
-			} else {
-				for ( language in this.options.languages ) {
-					if ( Object.prototype.hasOwnProperty.call(
-						this.options.languages,
-						language
-					) ) {
-						languagesCount++;
-					}
-				}
-			}
+			languagesCount = $.uls.utils.objectLength( this.options.languages );
 
 			// Show the Common languages section, unless the list is very short
 			if ( languagesCount > 12 ) {

test/jquery.uls.test.js

@@ -272,4 +272,25 @@
 		assert.ok( !$.uls.data.deleteLanguage( 'qqr' ), 'Deleting language qqr, which was never added, returns false.' );
 	} );
 
+	test( '-- $.uls.utils testing', 4, function ( assert ) {
+		var languages, saveObjectKeys;
+
+		languages = {
+			mn: 'монгол',
+			sah: 'саха',
+			udm: 'удмурт'
+		};
+
+		assert.strictEqual( $.uls.utils.objectLength( {} ), 0 );
+		assert.strictEqual( $.uls.utils.objectLength( languages ), 3 );
+
+		// Simulate a browser without Object.keys
+		saveObjectKeys = Object.keys;
+		Object.keys = undefined;
+
+		assert.strictEqual( $.uls.utils.objectLength( {} ), 0 );
+		assert.strictEqual( $.uls.utils.objectLength( languages ), 3 );
+
+		Object.keys = saveObjectKeys;
+	} );
 }( jQuery ) );