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Asked: 2026-05-27T09:59:55+00:00

I am trying to put together what I thought would be an easy solution

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I am trying to put together what I thought would be an easy solution for a friend.

He has a list of fan emails that he collects at gigs and off his website.

He sticks them in a single column file and saves them.

He needs to have them in comma delimited format containing 150 each, one single line.

He wants a “simple” local HTML form he can paste the list into and have the results displayed.

So, I started working on it but, it has proven past my ability.

So far I have some basics but, I really need help.
As you can see, I am really a beginner.

     <html><head>
        <script type="text/javascript">

        function makeit(){

        var enteredEmails = document.getElementById("emails").value;
        var cnt = document.getElementById("breakcnt").value;
        var mails = enteredEmails.toString();
        var textareacnt = '1';

        // Now I think I need to loop or create arrays of emails up to cnt //

        csvmails = mails.splice(0,cnt)

        // Then dynamically generate some textareas or boxes populated with a single comma delimited line of  cnt" emails //

 document.write("<textarea id=\"textareacnt\">" + csvmails + "</textarea>")

 textareacnt++; 

        }
        </script>
        </head><body>
        <form onsubmit="makeit();">
        <textarea name="emails" id="emails" rows="10" cols="75"></textarea><br />
        <input type="text" name="breakcnt" id="breakcnt"><br />
        <input type="submit" name="submit" value="submit">
        </form>
    <textarea id="results"></textarea>
        </body></html>

The textarera will have emails pasted into it like:

amail1@sometld.com
bmail1@sometld.com
cmail1@sometld.com
amail4@sometld.com
zmail10@sometld.com

… up to 6000 fan emails he has collected over the years

He needs the results to be:

amail1@sometld.com,bmail1@sometld.com,cmail1@sometld.com,amail4@sometld.com,zmail10@sometld.com

up to 150 emails long as I am sure the last chunk or array will not contain 150.

I cant get anything to work and I spent 6 hours on this so far.

Can someone please help? I feel like a complete idiot.

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1 Answer

  1. Editorial Team

    All you have to do is split the text into an array and then splice the array in a loop and join the slices you take out like this:

    var emails= document.getElementById('emails').value.split(/\s+/), list="";
while(emails.length) {
  list+=emails.splice(0,150).join(',')+"\n";
}
//list now has the result you are looking for

    I have made an example of how to this here: http://jsfiddle.net/PfB42/2/

    All you have to do is paste the emails into the text area and it will automatically change the format to the one you are looking for, and insert it to the <pre> area below the textarea

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