BitwiseCmd/app/bitwise/formatter.js

(function(should, app){

   app.compose(function() {

       app.set("formatter", {
           toBinaryString: function(num, totalLength) {

               var binaryStr = num.toString(2),
                   formatted = [],
                   i;

               if(totalLength != null) {
                   should.bePositiveInteger(totalLength);
               }

               for(i = 0; i<binaryStr.length; i++) {
                   formatted.push(binaryStr[i]);
               }

               while(totalLength > formatted.length) {
                   formatted.unshift('0');
               }

               return formatted.join('');
           }
       });
   })


})(window.should, window.app);