String.find

Syntax:: String.find(string, substring)
string: The mandatory string parameter can be any string containing zero or more of any combination of characters and white spaces.
substring: The mandatory substring parameter can be any string containing zero or more of any combination of characters and white spaces.

Returns the location of a specified substring in a string.

The String.find function searches a given string for the given substring and returns the index position of the first occurrence of the substring. If no match is made, then a -1 is returned.

This function treats a string as an array where the first index position is numbered zero and the last index position is the total length of the string minus one. The total length of the string can be found using the String.length function.

If either the string or substring parameters is the empty string "", or if both parameters are the empty string "", a -1 is returned.

Examples

Code:

<?xml
version="1.0"?>
 <!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD
WML 1.1//EN"

"http://www.WAPforum.org/DTD/wml_1.1.xml">

<wml>
 
 <card id="card1">

   <p>
    find
example
    </p>

   <do type="accept">

      <go
href="FindExample.wmls#findfind()" />

   </do>
 </card>
 

<card id="card2">
 <p>

   string = $(strng)

   <br />

   substring = $(substring)

   <br />
    index =
$(indexnum)
 </p>
 </card>
 

</wml>

Explanation:

Code for FindExample.wml

Language(s): WML

Code:

extern function
findfind()
 {
    var str =
Dialogs.prompt("Enter a string", "");
    var
sub = Dialogs.prompt("Enter a substring", "");

   var num = String.find(str, sub);

   WMLBrowser.setVar("strng", str);

   WMLBrowser.setVar("substring", sub);

   WMLBrowser.setVar("indexnum", num);

   WMLBrowser.go("FindExample.wml#card2");

};

Explanation:

Code for FindExample.wmls

Primary links

WMLScript » String » String.find

Examples

Code:

Explanation:

Language(s): WML

Code:

Explanation:

Language(s): WML

See Also: