01complejo.js

01compejo.js

// Assumption: '1' is not a number, but a String, so it shouldn't be added.
// [‘a’, 2, 4, [‘1’, 5, ‘b’, [2,3, [‘a’, 4, [1,’b’,[5,’a’]]]]]]
(function (exports) {
  'use strict';
  var sum;
  
  var getValue = function(element){
    var value = 0;
    if(typeof element === "number"){
      value = element;
    } else if(Array.isArray(element)){
      value = element.reduce(function(sum, item){
        sum += getValue(item);
        return sum;
      }, 0);
    } else {
      value = 0;
    }
    return value;
  }

  exports.complejo = function (array){  
    sum = 0;
   
    if (!Array.isArray(array)) { console.error('you must pass an array as parameter'); return -1; }
    if (0 === array.length) { console.error('array is empty'); return -1; }

    array.forEach(function(element){
      sum += getValue(element);
    });    
    return sum;       
  }
})(typeof window === 'undefined' ? module.exports : window);