Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Regular expression that only finds last instance

Posted on 2016-09-09
1
71 Views
Last Modified: 2016-09-09
If I have strings such as these:
1.  AB-123
2.  AB 123
3.  AB-123-1
4.  AB 123-1
5.  AB XYZ-1

I need a regular expression that determine if the end contains /\-\d+$/ and only #3, #4, and #5 to qualify.
The problem I'm running into is that the above regex matches for #1, #3, #4, and #5 since they all have hyphens.
If there's a nice regex that can be used to solve this, that would be great.  Otherwise, I'm open to javascript, such as using the split function.  I've been trying that unsuccessfully, too.

var splitter = str.split(/\-\d+$/)

I just don't have a good way to tell if the string qualifies with /\-\d+$/ when there are possible hyphen instances earlier in the string.
0
Comment
Question by:mock5c
1 Comment
 
LVL 22

Accepted Solution

by:
Kim Walker earned 500 total points
ID: 41791944
Assuming that 1., 2., 3., 4., 5. at the beginning of each example and the spaces after them are not part of the search string but the new line at the end of each line is, the following should work for a test condition.
/(\s|-)[\da-z]+-\d+$/

Open in new window

This searches for a space or dash followed by one or more alphanumeric characters followed by a dash and 1 or more numbers followed by a new line.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

As most anyone who uses or has come across them can attest to, regular expressions (regex) are a complicated bit of magic. Packed so succinctly within their cryptic syntax lies a great deal of power. It's not the "take over the world" kind of power,…
JavaScript can be used in a browser to change parts of a webpage dynamically. It begins with the following pattern: If condition W is true, do thing X to target Y after event Z. Below are some tips and tricks to help you get started with JavaScript …
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question