javascript - undefined returned from function

Question

I have a simple recursive function that is returning undefined instead of the desired string. Can anyone tell me what I am missing?

var someString = 'item1|item2|item3|item4';
        console.log( testData(someString, '|', 2) );

        function testData( data, token, count ) {   
            console.log(data);
            if( count == 0 ) { 
                return data; 
            } else {
                testData( data.substring( data.indexOf( token ) + 1 ), token, count - 1 );
            }
        }

Answer 1

You forgot the return statement in your else clause:

else {
    return testData( data.substring( data.indexOf( token ) + 1 ), token, count - 1 );
}