slug fix

public/src/utils.js

@@ -102,18 +102,23 @@
 		invalidUnicodeChars : XRegExp('[^\\p{L}\\s\\d\\-_]', 'g'),
 		invalidLatinChars : /[^\w\s\d\-_]/g,
 
+		trimRegex : /^\s+|\s+$/g,
+		collapseWhitespace : /\s+/g,
+		collapseDash : /-+/g,
+		trimTrailingDash : /-$/g,
+
 		//http://dense13.com/blog/2009/05/03/converting-string-to-slug-javascript/
 		slugify: function(str) {
-			str = str.replace(/^\s+|\s+$/g, ''); // trim
+			str = str.replace(utils.trimRegex, '');
 			str = str.toLowerCase();
 			if(/^[\w]+$/.test(str)) {
 				str = str.replace(utils.invalidLatinChars, '-');
 			} else {
 				str = XRegExp.replace(str, utils.invalidUnicodeChars, '-');
 			}
-			str = str.replace(/\s+/g, '-') // collapse whitespace and replace by -
+			str = str.replace(utils.collapseWhitespace, '-') // collapse whitespace and replace by -
-			str = str.replace(/-+/g, '-'); // collapse dashes
+			str = str.replace(utils.collapseDash, '-'); // collapse dashes
-			str = str.replace(/-$/g, '');
+			str = str.replace(utils.trimTrailingDash, '');
 			return str;
 		},
 
@@ -206,7 +211,7 @@
 
 	if (!String.prototype.trim) {
 		String.prototype.trim = function() {
-			return this.replace(/^\s+|\s+$/g, '');
+			return this.replace(utils.trimRegex, '');
 		};
 	}