Guards as nested ternaries vs If/else vs Switch

gistfile1.js

function attributes(xs, name) {
  return is_element(xs)?    xs.getAttribute(name)
       : is_array(xs)?      xs.map(attributes)
       : is_sequence(xs)?   map(xs, attributes)
       : /* otherwise */    raise(TypeError('Not supported.'))
}

// vs

function attributes(xs, name) {
  if (is_element(xs))  return xs.getAttribute(name)
  if (is_array(xs))    return xs.map(attributes)
  if (is_sequence(xs)) return map(xs, attributes)
  else
    throw TypeError('Not supported.')
}

// vs

function attributes(xs, name){ 
  switch (true) {
    case is_element(xs):  return xs.getAttribute(name)
    case is_array(xs):    return xs.map(attributes)
    case is_sequence(xs): return map(xs, attributes)
    default:              throw TypeError('Not supported.')
  }
}

livescript-is-beautiful-btw.ls

attributes = (xs, name) ->
  | is-element xs  => xs.get-attribute name
  | is-array xs    => xs.map attributes
  | is-sequence xs => map xs, attributes
  | otherwise      => throw TypeError 'Not supported.'