how to check whether any special character is present in a particular string

Question

I want to remove the '<' '>' from the string so i used the script

<html>
<body>

 <script>
  var f = ((/(<script>)/i).exec("hello<") != null);
  alert("ok"+f);

  document.write("<br>Value:" +f);

 </script>
</body>
</html>

But i'm getting the variant f value as null..

Could you please help me.if there is any issue with the code.

Answer 1

I hope this will help

if("hello<".indexOf('<') != -1){
     var f = "hello<".replace('<','');
     alert("ok "+f);   
}

Answer 2

You can you JavaScript regular expressions to achieve this.

"<script>".replace(/<|>/ig, "");
outputs: "script"

Answer 3

  var f = ('<script>'.replace(/<|>/g, ''));
  alert("ok"+f);

  document.write("<br>Value:" +f);

Answer 4

You can use .test method:

var originalString = '<script>',
    r = originalString.test(/<|>/g, ''); // returns true or false

if (r === true) {
  //whatever you wanna do if you have special characters in 
  // your string
} else {
  // no special chars - all clean!
}

how to check whether any special character is present in a particular string

Question

4 answers

solution1
0 2012-10-12 12:31:10

solution2
0 2012-10-12 12:35:16

solution3
0 2012-10-12 12:38:13

solution4
0 2012-10-12 13:48:50

how to check whether any special character is present in a particular string

Question

4 answers

solution1 0 2012-10-12 12:31:10

solution2 0 2012-10-12 12:35:16

solution3 0 2012-10-12 12:38:13

solution4 0 2012-10-12 13:48:50

solution1
0 2012-10-12 12:31:10

solution2
0 2012-10-12 12:35:16

solution3
0 2012-10-12 12:38:13

solution4
0 2012-10-12 13:48:50