Reselect: Add state arg for callback of createSelector

[json2d]

This is a dupe of another issue #137 that was closed because OP no longer needed the functionality, but hopefully I can make a convincing argument for it.

Here's my simple usecase for selecting recent entries in a basic todo app (minus the memoization you'd expect):

const entryByIdSelector = (state) => state.todos.entrybyId
const recentIdsSelector = (state) => state.todos.recentIds

const entrySelector = (id) => createSelector(
  entryByIdSelector,
  (entryById) => entryById[id]
)

const recentSelector = createSelector(
  recentIdsSelector,
  (ids, __state__) => ids.map( id => entrySelector(id)(__state__) )
)

as you can see in the callback of recentSelector, i need __state__ to call entrySelector.

entrySelector cant be made a selector arg since it takes id whose value comes from the result of another selector arg recentIdsSelector

here my workaround is just to dupe the code from entrySelector

const recentSelector = createSelector(
  recentIdsSelector,
  entryByIdSelector,
  (ids, entryById) => ids.map( id => entryById[id] )
)

this becomes a bit unwieldy esp with more complex selectors.

[taixw2]

Maybe you can

const entryByIdSelector = (state, id) => state.todos.entrybyId[id]
const entrySelector = createSelector(
  entryByIdSelector,
  (entry) => entry
)

// use
const id = getTodoId()
const entry = useSelector((state) => entrySelector(state, id))

[json2d]

@taixw2 not sure this will work when id changes and state remains unchanged because of how the selectors are memoized

also how would you implement the recentSelector?