why this java script not working

Question

0.00/5 (No votes)

See more:

JavaScript

<script type="text/javascript">
var str = "abc";
var patt1 = /^[a-z]$/;
if(patt1.test(str))
{
document.write(str);
alert(str);
}
</script>

i want to make regular expression for string if it match then alert
what problem in this code?

Posted 19-Jul-12 21:23pm

nilesh026

Updated 19-Jul-12 23:43pm

TorstenH.

v4

Add a Solution

Comments

StianSandberg 20-Jul-12 3:31am

what is your expected output?

TorstenH. 20-Jul-12 5:44am

I changed the tag so it will be found by JS developers and not by Java or script people who are not able to tell anything about.

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sandeep Mewara · Answer 1 · 2012-07-20T11:37:00

Problem is with your regex expression used.

Try:

JavaScript

var str = "abc";
var patt1 = /[a-z]/i;

//Tests if the given string matches the Regexp, and returns true if matching, false if not.
if(patt1.test(str))
{
  document.write(str);
  alert(str);
}

See details about JavaScript Regex object here: http://www.w3schools.com/jsref/jsref_obj_regexp.asp[^]

Vijay Thakare from Poona · Answer 2 · 2012-07-19T21:29:00

Solution 1

Hi this is working fine, please check and post error message.

Posted 19-Jul-12 21:29pm

Vijay Thakare from Poona

Comments

nilesh026 20-Jul-12 3:33am

sorry its my mistake now trace

Linto Leo Tom · Answer 3 · 2012-07-20T18:49:00

Solution 3

Try this

XML

<script type="text/javascript">
var str = "abc";
var patt1 = /^[a-z]$/;
if(str.search(pat1) != -1) {
  document.write(str);
  alert(str);
}
</script>

Happy Coding :)

Posted 20-Jul-12 18:49pm

Linto Leo Tom