text: const hasOwnProperty = Object.prototype.hasOwnProperty;
  
  const mapKeyValue = (obj, fn) => {
    const result = [];
    for (const key in obj) {
      if (hasOwnProperty.call(obj, key)) {
        const r = fn(key, obj[key]);
        r && result.push(r);
      }
    }
    return result;
  };
  
  module.exports = mapKeyValue;
  