`forEachSlice`

The forEachSlice method takes a function that it will then call for each Slice in a specified Index.

forEachSlice(
  indexId: Id,
  sliceCallback: SliceCallback,
): void

	Type	Description
`indexId`	`Id`	The `Id` of the `Index` to iterate over.
`sliceCallback`	`SliceCallback`	The function that should be called for every `Slice`.
returns	`void`	This has no return value.

This method is useful for iterating over the Slice structure of the Index in a functional style. The rowCallback parameter is a RowCallback function that will be called with the Id and value of each Row in the Slice.

Example

This example iterates over each Row in a Slice, and lists its Id.

const store = createStore().setTable('pets', {
  fido: {species: 'dog'},
  felix: {species: 'cat'},
  cujo: {species: 'dog'},
});
const indexes = createIndexes(store);
indexes.setIndexDefinition('bySpecies', 'pets', 'species');

indexes.forEachSlice('bySpecies', (sliceId, forEachRow) => {
  console.log(sliceId);
  forEachRow((rowId) => console.log(`- ${rowId}`));
});
// -> 'dog'
// -> '- fido'
// -> '- cujo'
// -> 'cat'
// -> '- felix'