吴裕雄--天生自然PHP-MySQL-JavaScript学习笔记：JavaScript函数、对象和数组

<script>
  function User(forename, username, password)
  {
    this.forename = forename
    this.username = username
    this.password = password
    this.showUser = showUser
  }

  function showUser()
  {
    document.write("Forename: " + this.forename + "<br>")
    document.write("Username: " + this.username + "<br>")
    document.write("Password: " + this.password + "<br>")
  }
</script>

<script>
  function User(forename, username, password)
  {
    this.forename = forename
    this.username = username
    this.password = password

    User.prototype.showUser = function()
    {
      document.write("Forename: " + this.forename + "<br>")
      document.write("Username: " + this.username + "<br>")
      document.write("Password: " + this.password + "<br>")
    }
  }
</script>

<script>
  numbers = []
  numbers.push("One")
  numbers.push("Two")
  numbers.push("Three")

  for (j = 0 ; j < numbers.length ; ++j)
    document.write("Element " + j + " = " + numbers[j] + "<br>")
</script>

<script>
  balls = {"golf":   "Golf balls, 6",
           "tennis": "Tennis balls, 3",
           "soccer": "Soccer ball, 1",
           "ping":   "Ping Pong balls, 1 doz"}

  for (ball in balls)
    document.write(ball + " = " + balls[ball] + "<br>")
</script>

<script>
  checkerboard = Array(
    Array(' ', 'o', ' ', 'o', ' ', 'o', ' ', 'o'),
    Array('o', ' ', 'o', ' ', 'o', ' ', 'o', ' '),
    Array(' ', 'o', ' ', 'o', ' ', 'o', ' ', 'o'),
    Array(' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '),
    Array(' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '),
    Array('O', ' ', 'O', ' ', 'O', ' ', 'O', ' '),
    Array(' ', 'O', ' ', 'O', ' ', 'O', ' ', 'O'),
    Array('O', ' ', 'O', ' ', 'O', ' ', 'O', ' '))

  document.write("<pre>")

  for (j = 0 ; j < 8 ; ++j)
  {
    for (k = 0 ; k < 8 ; ++k)
      document.write(checkerboard[j][k] + " ")

    document.write("<br>")
  }

  document.write("</pre>")
</script>

<script>
  pets = ["Cat", "Dog", "Rabbit", "Hamster"]
  pets.forEach(output)

  function output(element, index, array)
  {
    document.write("Element at index " + index + " has the value " +
      element + "<br>")
  }
</script>

<script>
  pets = ["Cat", "Dog", "Rabbit", "Hamster"]

  document.write(pets.join()      + "<br>")
  document.write(pets.join(' ')   + "<br>")
  document.write(pets.join(' : ') + "<br>")
</script>

<script>
  sports = ["Football", "Tennis", "Baseball"]
  document.write("Start = "      + sports +  "<br>")

  sports.push("Hockey");
  document.write("After Push = " + sports +  "<br>")

  removed = sports.pop()
  document.write("After Pop = "  + sports +  "<br>")
  document.write("Removed = "    + removed + "<br>")
</script>

<script>
  numbers = []

  for (j=1 ; j<6 ; ++j)
  {
    if (j == 2 || j == 5)
    {
      document.write("Processing 'todo' #" + j + "<br>")
    }
    else
    {
      document.write("Putting off 'todo' #" + j + " until later<br>")
      numbers.push(j)
    }
  }

  document.write("<br>Finished processing the priority tasks.")
  document.write("<br>Commencing stored tasks, most recent first.<br><br>")

  document.write("Now processing 'todo' #" + numbers.pop() + "<br>")
  document.write("Now processing 'todo' #" + numbers.pop() + "<br>")
  document.write("Now processing 'todo' #" + numbers.pop() + "<br>")
</script>

<script>
  sports = ["Football", "Tennis", "Baseball", "Hockey"]
  sports.reverse()
  document.write(sports)
</script>

<script>
  // Alphabetical sort
  sports = ["Football", "Tennis", "Baseball", "Hockey"]
  sports.sort()
  document.write(sports + "<br>")

  // Reverse alphabetical sort
  sports = ["Football", "Tennis", "Baseball", "Hockey"]
  sports.sort().reverse()
  document.write(sports + "<br>")

  // Ascending numeric sort
  numbers = [7, 23, 6, 74]
  numbers.sort(function(a,b){return a - b})
  document.write(numbers + "<br>")

  // Descending numeric sort
  numbers = [7, 23, 6, 74]
  numbers.sort(function(a,b){return b - a})
  document.write(numbers + "<br>")
</script>

<script>
  displayItems("Dog", "Cat", "Pony", "Hamster", "Tortoise")

  function displayItems(v1, v2, v3, v4, v5)
  {
    document.write(v1 + "<br>")
    document.write(v2 + "<br>")
    document.write(v3 + "<br>")
    document.write(v4 + "<br>")
    document.write(v5 + "<br>")
  }
</script>

<script>
  function displayItems()
  {
    for (j = 0 ; j < displayItems.arguments.length ; ++j)
      document.write(displayItems.arguments[j] + "<br>")
  }
</script>

<script>
  document.write(fixNames("the", "DALLAS", "CowBoys"))

  function fixNames()
  {
    var s = ""

    for (j = 0 ; j < fixNames.arguments.length ; ++j)
      s += fixNames.arguments[j].charAt(0).toUpperCase() +
           fixNames.arguments[j].substr(1).toLowerCase() + " "

    return s.substr(0, s.length-1)
  }
</script>

<script>
  words = fixNames("the", "DALLAS", "CowBoys")

  for (j = 0 ; j < words.length ; ++j)
    document.write(words[j] + "<br>")
    
  function fixNames()
  {
    var s = new Array()

    for (j = 0 ; j < fixNames.arguments.length ; ++j)
      s[j] = fixNames.arguments[j].charAt(0).toUpperCase() +
             fixNames.arguments[j].substr(1).toLowerCase()

    return s
  }
</script>

<script>
  function User(forename, username, password)
  {
    this.forename = forename
    this.username = username
    this.password = password

    this.showUser = function()
    {
      document.write("Forename: " + this.forename + "<br>")
      document.write("Username: " + this.username + "<br>")
      document.write("Password: " + this.password + "<br>")
    }
  }
</script>