How can I store a feeder value in a varaible to reuse it

I have a feeder containing some data, for example:

name jack jim jomana

And I want to send a request that simulate the name search action

1- user start to enter the fisrt letter of the name

2- then the 3 other letters

so the requests that I want to send : get ( https/bla/bla/search?q=here I want only the first letter of the name)

get ( https/bla/bla/search?q=here I want only the 3 first letters of the name)

I know that substring(start,end) works well but my problem how can I apply it on "${name}" because when I do "${name}".substring(0,1) => in this situation "${name}" doesn't retrive name value "jack"

Infos: I m using scala with gatling

when I do "${name}".substring(0,1) => in this situation "${name}" doesn't retrive name value "jack"

You can create additional action with logic which will produce the values that you need:

    .exec { session =>
      val name = session("name").as[String]

      val firstPartOfName = name.substring(0, 1)
      val secondPartOfName = name.substring(1, 4)

      session
        .set("firstPartOfName", firstPartOfName)
        .set("secondPartOfName", secondPartOfName)
    }
    .exec("...search?q=${firstPartOfName}")
    .exec("...search?q=${secondPartOfName}")