March 20, 2012
How to increment number in string using Javascript or Jquery
Question by user983208
The id of my textarea is string and of this format
id=’fisher[27].man’
I would like to clone the textarea and increment the number and get the id as fisher[28].man and prepend this to the existing textarea.
Is there a way to get this done easily with jquery?
var existingId = $("#at textarea:last").attr('id');
var newCloned = lastTextArea.clone();
var newId = newCloned.attr('id');
//add the index number after spliting
//prepend the new one to
newCloned.prepend("<tr><td>" + newCloned + "</td></tr>");
There has to be easier way to clone, get index number, split and prepend.
I’m have also tried to do this with regEx
var existingIdNumber = parseInt(/fisher[(d+)]/.exec(s)[1], 10);
Can anybody help me with this?
Answer by Starx
Correct regex would be this
/fisher[d+].man/
Here is a way through through which you would extract the the id.
id = text.replace(/fisher[(d+)].man+/g,"$1");
//Now do whatever you want with the id
Similarly, Same replacement technique can be used to get an incremented id as:
existingId = 'fisher[27].man';
newId = existingId .replace(/(d+)+/g, function(match, number) {
return parseInt(number)+1;
});
console.log(newId);
Demo with both usage
