Underscore Mixin to create Slugs

_.slugify.js

_.mixin({
  slugify: function(title){
    var replace = '-';
    var str = title.toString()
          .replace(/[\s\.]+/g,replace)
          .toLowerCase()
          .replace(new RegExp('[^a-z0-9'+replace+']','g'), replace)
          .replace(new RegExp(replace+'+','g'),replace)
        ;

    if( str.charAt(str.length-1) == replace ) str = str.substring(0,str.length-1);
    if ( str.charAt(0) == replace ) str = str.substring(1);

    return str;
  }
});

I didn't write this originally, but I've been using it so long I forget where it came from. All I did was turn it into a mixin, but sorry to whomever wrote this I can't give proper credit.