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How can I modify my <textarea> html value based on user input

I have a html textarea element in my page where user gives comma separate values. for example below.
A-48402,AA,SBAFL,AA+,USD,,
From javascript (which I prefer) I am applying logic to check if the last row value is blank (separated by comma only) then to put a String value 'Y'. Thus I am writing the below
var data = document.getElementById('txid').value;
rows = data.split('\n');var row1 = rows[0];row1Values=row1 .split(',');
Then I am applying logic to verify whether the last value for every row is blank or not, which is actually blank, then adding the below.
row_values.push('Y');
It is reflecting in debugger.
But what I see is the value 'Y' in the Java action class is not reflecting and showing usual 'Y' while the page submit. How can I add this value 'Y' in every rows end (where there is blank) so that it will be visible in action class?
String Data = request.getParameter('mbs_inst_data');
This data is populated with the same blank values.

If you're only checking for the last row then the only case that would happen is when it's ,,
so you can just do a simple check
let data = 'A-48402,AA,SBAFL,AA+,USD,,'
data = data.split(',')
let lastRowIsBlank = data[data.length-2] === ""
// we are doing length - 2 because in your situation we have 2 ""
// since you have two commas. If you have only 1 comma we would
// the same steps but with length - 1
if(lastRowIsBlank) data[data.length-2] = "Y"
return data.toString()

You can use it like this.
<p id="demo">Visit Microsoft! ,,</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var str = document.getElementById("demo").innerHTML;
var res = str.replace(/,,$/, ',Y');
document.getElementById("demo").innerHTML = res;
}
</script>
Output
Visit Microsoft! ,Y
I guess this would help you.

Replace specific value in URL String in JavaScript

I have a String having URL like:
var url ="http://ispeakphone.com/checkout/cart/add/uenc/aHR0cDovL2lzcGVha3Bob25lLmNvbS9zYW1zdW5nL3NhbXN1bmctZ2FsYXh5LXMvZ2FsYXh5LXM5LXBsdXMuaHRtbA,,/product/619/form_key/foxmD7jgFv31xmEs/qty/3/?options=cart";
I am getting quantity on button click from input as well like:
var qty = jQuery(this).siblings('.quantity-field').val(); // 4
How can I change this qty in URL String "/qty/3/" to "/qty/4/" on every time I get new value from input on button click?
I can't simply find and replace because i don't know /qty/3 exact number its dynamic it could be 2,3,4,5 etc

here is function for having this functionality
function changeValue(str,value){
return str.replace(/\/qty\/[0-9]+\//,`\/qty\/${value}\/`)
}
console.log(url,4);

You can use replace method.
capture everything up to /qty in group 1 (g1), all the following digits in group 2 (g2), and remaining in group 3 (g3), in callback change value of group 2 as required.
var url ="http://ispeakphone.com/checkout/cart/add/uenc/aHR0cDovL2lzcGVha3Bob25lLmNvbS9zYW1zdW5nL3NhbXN1bmctZ2FsYXh5LXMvZ2FsYXh5LXM5LXBsdXMuaHRtbA,,/product/619/form_key/foxmD7jgFv31xmEs/qty/3/?options=cart";
let desired = url.replace(/^(.*\/qty\/)(\d+)(.*)$/g, function(match,g1,g2,g3){
return g1+ (Number(g2)+1) + g3
})
console.log(desired)

Passing data from JSP to jQuery and plotting in Highcharts

I am reading a text file which contains data to plot a graph in JSP. I am using hidden method and passing the value to the jQuery.
I am able to retrieve the value in jQuery through an alert but when I try to split the value using .split(), the values don't split based on the delimiter specified.
<%
//response.setIntHeader("Refresh", 10);
String jspPath = "C:/Users/Desktop/Out.txt";
BufferedReader reader = new BufferedReader(new FileReader(jspPath));
//BufferedReader br = new InputStreamReader(new FileInputStream(txtFilePath));
StringBuilder sb = new StringBuilder();
String line;
String lastline = "";
while((line = reader.readLine())!= null){
lastline = line;
}
String column3[] = lastline.split("\\*");
%>
<input type="hidden" value="<%=column3[2]%>" id = "filevalue">
jQuery part:
var a = $('#filevalue').text();
var lines = a.split('\n');
alert(lines);
I am referring to this fiddle Link to create the pie chart. Here instead of the hard coded data I am trying to pass the data from the JSP. Since my data is not getting split, i m unable to proceed further.
Please help me to split the data in order to provide it as input to the pie chart.

Two things - try using val() instead of text() to get the value from the hidden field, and you need to quote the "\" in the split command (with an extra "\"):
var a = $('#filevalue').val();
var lines = a.split('\\n');
alert(lines);

Finding the difference between two fields using JavaScript in iText

I would like to find difference between two fields using JavaScript in iText.
I am able to find the sum of them using below code:
PdfStamper stamperResult = new PdfStamper(readersectionResult, new FileOutputStream(RESULT_NEW));
stamperResult .addJavaScript("var nameField = this.getField(\"total\");"+ "nameField.setAction(\"Calculate\",'AFSimple_Calculate(\"SUM\",\"total1\", \"total2\")')");
Is there any way to find the difference using 'AFSimple_Calculate' similar to what I did in the above code snippet?
Thanks for editing! I tried your suggestion but it does not seem to work for some reason.
stamperResult.addJavaScript(" var total1 = this.getField(\"value1\"); var total2 = this.getField (\"value2\"); var subtr = this.getField(\"total\"); subtr.value = total1.value - total2.value;");
I separated newlines by spaces and added right escape characters.
I was also thinking of using a different logic for subtraction using AF methods : like this
stamperResult.addJavaScript("var nameField = this.getField(\"total\");"+ "nameField.setAction(\"Calculate\",'AFSimple_Calculate(\"SUM\",\"total1\", \"-total2\")')");
In the above code I was trying to add -(negative value) to total 2 so that it will be subtracted from total1 though the AF method is still 'SUM'.
But that does not work.
The below simple code seem to work :
stamperResult.addJavaScript("var nameField = this.getField('total');" +
"nameField.setAction('Calculate'," +
"'subtract()');" +
"" +"function subtract(){this.getField('total').value
= (this.getField('total_1').value -this.getField('total_2').value); }");

I updated your question because it contained many spelling errors. I didn't edit the code snippet because I don't know what the original code snippet is like. In any case: I think something went wrong during the copy/paste process, as I don't think your code snippet compiles in its current state.
In any case: as far as I know the AF-methods (the AF stands for Adobe Forms) may not be present in every viewer, and as far as I know Adobe didn't implement a way to subtract values from each other in the AFSimple_Calculate method.
For these two reasons, you may prefer regular JavaScript instead of using a pre-canned function that may or may not be pre-canned.
This regular JavaScript may look like this:
var total1 = this.getField("total1");
var total2 = this.getField("total2");
var subtr = this.getField("difference");
subtr.value = total1.value - total2.value;
I'm not sure if that answers your question. Maybe you just want:
var total1 = this.getField("total1");
var total2 = this.getField("total2");
var namefield = total1.value - total2.value;
You can put these lines inside a String using the right escape characters and replacing the newlines by spaces or newline characters.
Of course, you need to trigger this code somewhere. Below you'll find an example that puts the negative value of the content of a value1 field into a value2 field.
public static void main(String[] args) throws IOException, DocumentException {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("js.pdf"));
document.open();
writer.addJavaScript("function makeNegative() { this.getField('value2').value = -(this.getField('value1').value); } ");
Rectangle rect1 = new Rectangle(40, 740, 200, 756);
TextField value = new TextField(writer, rect1, "value1");
value.setBorderColor(GrayColor.GRAYBLACK);
value.setBorderWidth(0.5f);
PdfFormField field = value.getTextField();
field.setAdditionalActions(PdfName.BL, PdfAction.javaScript("makeNegative();", writer));
writer.addAnnotation(field);
Rectangle rect2 = new Rectangle(40, 710, 200, 726);
TextField neg = new TextField(writer, rect2, "value2");
neg.setBorderColor(GrayColor.GRAYBLACK);
neg.setBorderWidth(0.5f);
writer.addAnnotation(neg.getTextField());
document.close();
}
Note that I used a Blur action. This means the method will be triggered as soon as you select another field after filling out the value1 field.

Javascript ADO recordset open method not working

I have the following code in an html page in a Javascript tag:
var adOpenDynamic = 2
var adLockOptimistic = 3
var conn_str = 'Provider=Microsoft.Jet.OLEDB.4.0; Data Source=G:/path_to_myDB.mdb'
var conn = new ActiveXObject("ADODB.Connection")
conn.open(conn_str)
and this is a the beginning of a function that is called from the onload event of the html :
var PassNbrAppel = new Array();
var i=1
var rsPass = new ActiveXObject("ADODB.Recordset")
SQLpass = 'SELECT Avis.[Numéro Passerelle], Count(Avis.[Numéro Passerelle]) AS [CompteDeNuméro Passerelle] FROM Avis WHERE (((Avis.[Date Appel])>#10/19/2011# And (Avis.[Date Appel])<#11/07/2011#) AND (Avis.[Numéro Passerelle] IS NOT NULL)) GROUP BY Avis.[Numéro Passerelle] ORDER BY Val(Avis.[Numéro Passerelle]);'
rsPass.open(SQLpass, conn, adOpenDynamic, adLockOptimistic)
rs2arr(rsPass,arrPass)
rs.close()
I get the following error message (translated from french): "no value given for one or more of the required parameters" and the line number is pointing to rsPass.open(SQLpass, conn, adOpenDynamic, adLockOptimistic)
I keep on re-checking to see if there is a mistake in the code but I can't seem to find anything wrong...
I took bits of code from here

The problem was the special characters in my SQL statement. Instead of trying to make it work with the "é" I changed the feild names so they dont have special characters. So much for French pride...