update_selected: determine the proper selection
In ijlyttle/shinypod: Reusable shiny modules

Description Usage Arguments Value Examples

Used for shiny::selectInput to allow you to update its selection when its choices change.

1	update_selected(value, choices, index = NULL)

`value`	character vector, current value of an input
`choices`	character vector, new choices for an input
`index`	integer, if `value` is not in defualt `choices`, uses this index of `choices`.

character vector of proposed selection

  update_selected("a", c("a", "b", "c"))
  update_selected("a", NULL)
  update_selected("d", c("a", "b", "c"))
  update_selected("d", c("a", "b", "c"), index = 1)