Prototype Enumerable eachSlice() Method


Advertisements


This method groups the items in chunks based on a given size, with last chunk being possibly smaller.

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.eachSlice([context]);

Return Value

  • Returns array of slices ( arrays ).

Example

<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>

<script>

var students = [
  { name: 'Sunny', age: 20 },  { name: 'Audrey', age: 21 },
  { name: 'Matt', age: 20 },   { name: 'Lodie', age: 26 },
  { name: 'Will', age: 21 },   { name: 'David', age: 23 },
  { name: 'Julien', age: 22 }, { name: 'Thomas', age: 21 },
  { name: 'Serpil', age: 22 }
];

function showResult(){
    
  alert ( students.eachSlice(4, function(toon) {
     return toon.pluck('name');
   }) );

   var arr = students.eachSlice(2).first();
   arr.each(function(s) {
     var h = $H(s);
     alert("Value : " + h.inspect());
   });
}

</script>
</head>

<body>

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

</body>
</html>

To understand it in better way you can Try it yourself.


prototype_enumerating.htm

Advertisements