How to define a local variable to be a list?

I'm not entirely sure what you're trying to do but see this code for a local variable that is a list. If this doesn't help then you'll need to give more specific information.

Note that I've used two different ways of referencing where I want things saved. They function exactly the same.

1. Quoted square brackets indexing (eg. local!valueList[fv!index]["username"])
2. Dot notation (eg. local!valueList[fv!index].password)

a!localVariables(
  local!valueList,
  {
    a!forEach(
      items: local!valueList,
      expression: a!sideBySideLayout(
        items: {
          a!sideBySideItem(
            item: a!textField(
              label: concat(
                "Username ",
                fv!index
              ),
              labelPosition: "ADJACENT",
              value: index(
                fv!item,
                "username",
                {}
              ),
              saveInto: local!valueList[fv!index]["username"]
            )
          ),
          a!sideBySideItem(
            item: a!textField(
              label: concat(
                "Password ",
                fv!index
              ),
              labelPosition: "ADJACENT",
              value: index(
                fv!item,
                "password",
                {}
              ),
              saveInto: local!valueList[fv!index].password
            )
          ),
          a!sideBySideItem(
            item: a!richTextDisplayField(
              label: concat(
                "Delete row ",
                fv!index
              ),
              labelPosition: "COLLAPSED",
              value: a!richTextIcon(
                icon: "times",
                color: "NEGATIVE",
                link: a!dynamicLink(
                  value: remove(
                    local!valueList,
                    fv!index
                  ),
                  saveInto: local!valueList
                )
              )
            )
          )
        }
      )
    ),
    a!richTextDisplayField(
      label: "Add new entry to list",
      labelPosition: "COLLAPSED",
      value: {
        a!richTextIcon(
          icon: "plus-circle",
          link: a!dynamicLink(
            value: {
              username: loggedInUser(),
              password: "password123"
            }
          )
        ),
        a!richTextItem(
          text: "  Add new item to list",
          link: a!dynamicLink(
            value: append(
              local!valueList,
              {
                username: loggedInUser(),
                password: "password123"
              }
            ),
            saveInto: local!valueList
          )
        )
      }
    )
  }
)

You could also explore the a!map() function rather than creating a dictionary such as what I did in the "+ Add new item to list" saves (starting at lines 68 and 79)

I'm not entirely sure what you're trying to do but see this code for a local variable that is a list. If this doesn't help then you'll need to give more specific information.

Note that I've used two different ways of referencing where I want things saved. They function exactly the same.

1. Quoted square brackets indexing (eg. local!valueList[fv!index]["username"])
2. Dot notation (eg. local!valueList[fv!index].password)

a!localVariables(
  local!valueList,
  {
    a!forEach(
      items: local!valueList,
      expression: a!sideBySideLayout(
        items: {
          a!sideBySideItem(
            item: a!textField(
              label: concat(
                "Username ",
                fv!index
              ),
              labelPosition: "ADJACENT",
              value: index(
                fv!item,
                "username",
                {}
              ),
              saveInto: local!valueList[fv!index]["username"]
            )
          ),
          a!sideBySideItem(
            item: a!textField(
              label: concat(
                "Password ",
                fv!index
              ),
              labelPosition: "ADJACENT",
              value: index(
                fv!item,
                "password",
                {}
              ),
              saveInto: local!valueList[fv!index].password
            )
          ),
          a!sideBySideItem(
            item: a!richTextDisplayField(
              label: concat(
                "Delete row ",
                fv!index
              ),
              labelPosition: "COLLAPSED",
              value: a!richTextIcon(
                icon: "times",
                color: "NEGATIVE",
                link: a!dynamicLink(
                  value: remove(
                    local!valueList,
                    fv!index
                  ),
                  saveInto: local!valueList
                )
              )
            )
          )
        }
      )
    ),
    a!richTextDisplayField(
      label: "Add new entry to list",
      labelPosition: "COLLAPSED",
      value: {
        a!richTextIcon(
          icon: "plus-circle",
          link: a!dynamicLink(
            value: {
              username: loggedInUser(),
              password: "password123"
            }
          )
        ),
        a!richTextItem(
          text: "  Add new item to list",
          link: a!dynamicLink(
            value: append(
              local!valueList,
              {
                username: loggedInUser(),
                password: "password123"
              }
            ),
            saveInto: local!valueList
          )
        )
      }
    )
  }
)

You could also explore the a!map() function rather than creating a dictionary such as what I did in the "+ Add new item to list" saves (starting at lines 68 and 79)