count "(" in string

Jt107 · 11-29-2010, 06:20 PM

I need to do an input text validation which include opening parenthesis and closing parenthesis, what I need to validate is the opening parenthesis match with closing parenthesis. Here is a sample of the entry text:

thisis(test(of(matching(parenthesis)and)if)working

which one closing parenthesis is missing. I would like to warn the user to correct it before submit.

When I use ListValueCount(form.myValue,"(")> gives me 0 accourance.
Not sure how could I count the "(" and ")" to compare. Please advice.

Thanks,
JT

Jt107 · 11-29-2010, 08:19 PM

use the following function to solved the problem:

<cffunction name="countOccurrences" access="public" returntype="numeric" required="true">

    <cfargument name="string" type="string" required="True" />

    <cfargument name="subString" type="string" required="True" />

    

    <cfset VAR position = findNoCase(arguments.substring,arguments.string,1) />

    <cfset VAR count = 0 />

    

    <cfif len(trim(arguments.substring))>

        <cfloop condition="position NEQ 0">

            <cfset count = count + 1 />

            <cfset position = findNoCase(arguments.substring,arguments.string, position + len(trim(arguments.substring))) />

        </cfloop>

    <cfelse>

        <cfreturn 0 />

    </cfif>



<cfreturn count />

</cffunction>