is there a way in javascript to create dynamic arrays [Archive]

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b_j_mall

08-30-2002, 01:18 AM

Hi everyone,
i am stuck at a problem.
i am trying to craete a redimmensionable array using javascript, is there a way to do this, i know that this can be done in vbscript using redim and preserve commands.

If not then is it possible to variables between javascript and vbscript, or call vbscript function using javascript.

a sample code will be much aprreciated

thanks for your time!

J

jkd

08-30-2002, 01:37 AM

Arrays in Javascript grow as required.

var bla = new Array(3);
bla.length == 3 //true
bla[100] = 'something';
bla.length == 101 //true

glenngv

08-30-2002, 02:38 AM

so to add an item at the end of the array:

blah[blah.length] = 'something';

Shyama_Mukherji

09-18-2009, 11:29 AM

This is a script to create dynamic arrays in Javascript
<HTML>
<head>
<Script language = "Javascript">
//Example function to create dynamic arrays

function dynamicarr()
{
var i=0
arr = new Array(3)
alert('Hello')

arr[0]="One"

arr[1]="Two"
arr[2]="Three"
document.write(arr[0]+' '+arr[1]+' '+arr[2])
var num=3
// num is the number of items to be added
//Following is the modified declaration of the array to increase number of elements by num
arr = new Array(arr.length+num)
arr[3]="Four"
document.write(arr[3])
}

</Script>
</head>
<A href = "Javascript:dynamicarr()">trythis </A>
</HTML>

jmrker

09-18-2009, 02:48 PM

I'm not sure why you are calling it 'dynamic' array if you hard code it from the start (?)

Consider this:

<html>
<head>
<title>Dynamic Arrays</title>
<script type="text/javascript">
var dynArray = [];
function InsertEntry() {
var tmp = document.getElementById('entry').value;
dynArray.push(tmp);
}
function ShowEntries() {
document.getElementById('EntryList').innerHTML = dynArray.join('<br>');
}
</script>
</head>
<body>
Enter variable: <input id="entry" value="">
<button onclick="InsertEntry()">Append value</button>
<button onclick="ShowEntries()">Display values</button>
<div id="EntryList'></div>
</body>
</html>

Coded on the fly, so untested at this time ... should work ;)
:)