Prototype - Enumerable max() Method


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This method returns the maximum element (or element-based computation), or undefined if the enumeration is empty. Elements are either compared directly, or by first applying the iterator and comparing the returned values.

The optional context parameter is what the iterator function will be bound to. If used, the this keyword inside the iterator will point to the object given by the argument.

Syntax

Iterator.max(context);

Return Value

Returns the maximum value.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            alert("$R(1,10).max() : " +  $R(1,10).max() );
            // Returns 10

            function Person(name, age) {
               this.name = name;
               this.age = age;
            }
            var john = new Person('John', 20);
            var mark = new Person('Mark', 35);
            var daisy = new Person('Daisy', 22);

            alert("Max Age:"+[john, mark, daisy].max(function(person) {
               return person.age ;
            }) );
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />
      <br />
      <input type = "button" value = "Result" onclick = "showResult();"/>
   </body>
</html>

Output


prototype_enumerating.htm

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