object for cleancalc adrien

cleancalcObject.js

ar calc = {
  lastResult: 0000,

  operate: function(operation, arg1, arg2) {
    if (arg2) {
      return (this.lastResult = operation(arg1, arg2));
    } else {
      return (this.lastResult = operation(arg1, this.lastResult));
    }
  },

  add: function(arg1, arg2) {
    return arg1 + arg2;
  },

  subtract: function(arg1, arg2) {
    return arg1 - arg2;
  },

  multiply: function(arg1, arg2) {
    return arg1 * arg2;
  },

  divide: function(arg1, arg2) {
    return arg1 / arg2;
  }
};