Question

In javascript, what is the best way to parse an INT from a string which starts with a letter (such as ‘test[123]’)? I need something that will work for the example below.

My JS:

$(document).ready(function() {      $(':input').change( function() {         id = parseInt($(this).attr('id'));  //fails for the data below         alert(id);     }); } 

My generated HTML:

<select id='attribute[123]'> <!-- various options --> </select> <select id='attribute[456]'> <!-- various options --> </select> 

Thank you!

Answer 1

You could use a regular expression to match the number:

$(this).attr('id').match(/\d+/)