# Rank [Obj,Double]

### Description
Rank objects by the value of a double property compared to a given value.

### Input
- `SOURCE [OBJ,Double]`: list of pairs to rank

### Output
- `CLOSE [OBJ]`: ranked objects, closest to the given value on top
- `FAR [OBJ]`: ranked objects, farthest from the given value on top

### Parameters
- `Value`: the value to compare each object's value against
- `Ranking Function`:
  - `Constant`: the input value becomes the score
  - `Normalised`
    - `Slope`: positive value determining the slope of the ranking curve (which is a convex cusp).
      The higher the slope, the wider the ranking (i.e. the closer together the resulting scores).
      Explicitly, at distance `Slope` away from the given value, the new rank is 0.5.
- `Hard filter`: optional hard filters to apply before ranking
  - `No filter`
  - `Not greater than Value`
  - `Not smaller than Value`