Interface CompareFn<T>

A callback function that compares two values. Return > 0 to sort 'b' before 'a'; < 0 to sort 'a' before 'b'; or 0 to keep original order of 'a' & 'b'.

This function has an optional subscribe function that follows the Svelte store Subscriber pattern. If a subscribe function is provided automatic updates to the reduced index is performed.

interface CompareFn<T> {
subscribe?: (indexUpdate: IndexUpdateFn) => () => void;
(a: T, b: T): number;
}

Type Parameters

T
any - Type of data.

CompareFn(a: T, b: T): number
Parameters
- a: T
  Element 'a' of backing data to sort.
- b: T
  Element 'b' of backing data to sort.
Returns number

Index

Properties

Properties

`Optional`subscribe

subscribe?: (indexUpdate: IndexUpdateFn) => () => void

Optional subscribe function following the Svelte store / subscribe pattern.

Type Declaration

- (indexUpdate: IndexUpdateFn): () => void
- Parameters
  - indexUpdate: IndexUpdateFn
    Callback function that is invoked on update / changes. Receives index update function.
  Returns () => void