[SalesForce] a array contains a string or not with Expression in Lightning Component

With expression, I want to know that whether a string is contained in a array or not.

case code is here.

Is there any way to fix it or a workaround?

Not possible in an expression.

You'll want to use another component in the iteration. In that component you can use JavaScript for that logic.

I figured it out after multiple times modifying the id. This works

 <div id="{!'New' + v.ownerId}"></div>

You can call c.calculateOpptyValue from the c.saveFunction funtion Example:

c.saveFunction(){
  console.log('===');
  calculateOpptyValue(); //Call functions here
}