createMapByKey

function createMapByKey<Entity, KeyName extends keyof Entity>(
  objects: Entity[],
  key: KeyName
): Map<Entity[KeyName], Entity>;

Converts Entity[] to a Map. The converted map has Entity[key] as the key, and Entity as the value.

Example

const objects = [
  { id: 'a', value: 'foo' },
  { id: 'b', value: 'bar' },
];

const map = createMapByKey(objects, 'id'); // Map<Entity['id'], Entity>

map.get('a'); // { id: 'a', value: 'foo' }
map.get('b'); // { id: 'b', value: 'bar' }