arraylist in javascript

sajith · 03-20-2008, 12:55 AM

sir,

i have a arraylist in jsp, i need to pass this arraylist to javascript and store there.

For some validations i need to refer this stored arraylist in javascript.
And display some messages to user.

how can i pass arraylist object fron jsp to javscript.
how can i search this arraylist in javascript for some specified value.

waiting for your reply......

Jesdisciple · 03-22-2008, 12:04 PM

I don't know JSP, but I do know how to inject server variables into JavaScript. In PHP it would be something like this:

Code:

//JavaScript document
<?php
$arr = array('Bob', 'Tom', 'Harry');
?>
var arr = <?php echo('[' . implode(',', "'" . $arr . "'") . ']'); ?>;

The function 'echo' writes output to the client; 'implode' puts each array value, surrounded by single-quotes, together with a comma between each consecutive pair. The dots concatenate strings together like a plus-sign does in Java. The output of the above would be:

Code:

//JavaScript document

var arr = ['Bob','Tom','Harry'];

prad77 · 03-23-2008, 05:44 PM

You cannot pass the arraylist object from JSP to JS directly. You need to loop through each value and construct the JS array object.

Here is the sample code snippets.

<script language="javascript">
var tempArr = new Array();
<%
for (int i=0; i<tempArrayList.size(); i++){%>
tempArr[<%=i%>] = <%=(String)tempArrayList.get(i);%>
<%
}
%>
</script>

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