whole_func_string: function (v) {
    var result = 0
    var key
    for (key in v) {
        v.hasOwnProperty(key) && result++
    }
    return result
  }
func_code_string: function (v) {
    var result = 0
    var key
    for (key in v) {
        v.hasOwnProperty(key) && result++
    }
    return result
  }
func_documentation_string: return number
  - counting key of object