(function(define) {'use strict';
define(function(require) {

   return {
      mixin: function mixin(target) {
         Array.prototype.slice.call(arguments, 1)
            .forEach(function(source) {
               Object.keys(source).forEach(function(key) {
                  target[key] = source[key];
               });
            });
         return target;
      }
   };

});

}(typeof define === 'function' && define.amd ? define : function(factory) {
   'use strict';
   module.exports = factory(require);
}));

@@ -54,16 +54,736 @@
 ire) %7B%0A%0A
+   /* repeat, for carrying out repeated improvement until stopping%0A    * condition is satisfied.%0A    *%0A    * %60init%60 is the initial value,%0A    * %60step%60 is a function which returns the new value, and%0A    * %60n%60 is a non-negative integer (number of steps to take),%0A    *  a function returning a boolean, or missing.%0A    */%0A   function repeat(init, step, n) %7B%0A      var prev, curr, done;%0A      curr = init;%0A      if (n === 0) %7B return curr; %7D%0A      done = typeof n === 'function' ? n :%0A             n %3E 0 ? function() %7B n -= 1; return n === 0; %7D :%0A                     function() %7B return curr === prev; %7D;%0A      while (!done()) %7B%0A         prev = curr;%0A         curr = step();%0A      %7D%0A      return curr;%0A   %7D%0A%0A   /* mixin */%0A
    retur
@@ -1080,24 +1080,46 @@
 get;%0A      %7D
+,%0A      repeat: repeat
 %0A   %7D;%0A%0A%7D);%0A

Implement repeat method.