CODEWITHSUNDEEP
javascriptregex
funerr
funerr

Reputation: 8176

JS regex not working

I have the following code:

searchSt = "Test", searchEd = " in";

var html = body.clone()
    .children()
    .remove()
    .end()
    .text();

alert(searchSt + "|" + searchEd);
var patt = searchSt + "(.*)" + searchEd;
var result = html.match(patt);
alert(result[0]); //returns null

This returns null although I am sure the words are there: html:

Hello World
Test Write SomeThing here is Words do it. hit in me

What is wrong?

Upvotes: 0

Views: 91

Answers (3)

Eliseu Monar dos Santos
Eliseu Monar dos Santos

Reputation: 942

Put a string regular expression inside the RegExp constructor (espacing the characters, if needed):

var re = new RegExp(searchSt + "(.*)" + searchEd); // => /Test(.*)in/

With inverted bars:

var re = new RegExp("\\d"); // => /\d/

Upvotes: 0

andrew.sanin
andrew.sanin

Reputation: 51

If you are using JQuery the code should be the following:

<html>
<head>
<title>Test</title>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<body>
Hello World
Test Write SomeThing here is Words do it. hit in me 
</body>
</html>
<script type="text/javascript">
    var searchSt = "Test", searchEd = " in";
    var html = $('body').clone().children().remove().end().text();

            alert(searchSt+"|"+searchEd);
            var patt = searchSt+"(.*)"+searchEd;
            var result = html.match(patt);
            alert(result[0]);//returns null

</script>

Make sure that script is placed below the body tag. If it's above than the body tag can't be found. And also I changed the way how to get body $('body').

There is no problem with regex

Upvotes: 1

user557597
user557597

Reputation:

It doesn't look like its a regex problem. Probably something else.
Test here http://ideone.com/nNwz3 

var html = "Hello World\
Test Write SomeThing here is Words do it. hit in me";

var searchSt = "Test", searchEd = " in";

var patt = searchSt+"(.*)"+searchEd;
var result = html.match(patt);

print ("'" + result[0] + "'");
print ("'" + result[1] + "'");

output 

'Test Write SomeThing here is Words do it. hit in'
' Write SomeThing here is Words do it. hit'

Upvotes: 0

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