docs: def toFloat (str, default=None):
      """toFloat(str[, default]) -> float | default
  
      Converts the given string to a floating-point value.  If the
      string could not be converted, default (None) is returned.
  
      NOTE: This method is *significantly* more effecient than
      toNumber() as it only attempts to parse floating-point numbers,
      not integers or hexadecimal numbers.
  
      Examples:
  
      >>> f = toFloat("4.2")
      >>> assert type(f) is float and f == 4.2
  
      >>> f = toFloat("UNDEFINED", 999.9)
      >>> assert type(f) is float and f == 999.9
  
      >>> f = toFloat("Foo")
      >>> assert f is None
      """
      value = default
  
      try:
          value = float(str)
      except ValueError:
          pass
  
      return value