Is the below code valid?

var cb0 = function (req, res, next) {
  console.log('CB0')
  next()
}
var cb1 = function (req, res, next) {
  console.log('CB1')
  next()
}
var cb2 = function (req, res) {
  res.send('Hello from C!')
}
app.get('/example/c', [cb0, cb1, cb2])