JavaScript Array Methods
The Array object has many properties and methods which help developers to handle arrays easily and efficiently. You can get the value of a property by specifying arrayname.property and the output of a method by specifying arrayname.method().
- length property –> If you want to know the number of elements in an array, you can use the length property.
- prototype property –> If you want to add new properties and methods, you can use the prototype property.
- reverse method –> You can reverse the order of items in an array using a reverse method.
- sort method –> You can sort the items in an array using sort method.
- pop method –> You can remove the last item of an array using a pop method.
- shift method –> You can remove the first item of an array using shift method.
- push method –> You can add a value as the last item of the array.
<html>
<head>
<title>Arrays!!!</title>
<script type="text/javascript">
var students = new Array("John", "Ann", "Aaron", "Edwin", "Elizabeth");
Array.prototype.displayItems=function(){
for (i=0;i<this.length;i++){
document.write(this[i] + "<br />");
}
}
document.write("students array<br />");
students.displayItems();
document.write("<br />The number of items in students array is " + students.length + "<br />");
document.write("<br />The SORTED students array<br />");
students.sort();
students.displayItems();
document.write("<br />The REVERSED students array<br />");
students.reverse();
students.displayItems();
document.write("<br />THE students array after REMOVING the LAST item<br />");
students.pop();
students.displayItems();
document.write("<br />THE students array after PUSH<br />");
students.push("New Stuff");
students.displayItems();
</script>
</head>
<body>
</body>
</html>
anand.johari1994