Function groupBy

groupBy<T, I, K>(iterable, keySelector, itemSelector?): Record<K, I[]>
Groups an array into key accessible groups of objects
Type Parameters
- T
- I = T
- K extends string | number = string
Parameters
- iterable: Iterable<T>
  
  iterable items to group
- keySelector: keyof T | ((item) => undefined | K)
  
  function to get the group by key
- Optional itemSelector: ((item) => I)
  - - (item): I
    - Parameters
      
      item: T
      
      Returns I
Returns Record<K, I[]>
- Defined in packages/util/src/collection.ts:158
groupBy<T, K, I>(iterable, keySelector, itemSelector?): Promise<Record<K, I[]>>
Groups an array into key accessible groups of objects
Type Parameters
- T
- K extends string | number
- I = T
Parameters
- iterable: Iterable<T>
  
  iterable items to group
- keySelector: ((item) => Promise<undefined | K>)
  
  function to get the group by key
  - - (item): Promise<undefined | K>
    - Parameters
      
      item: T
      
      Returns Promise<undefined | K>
- Optional itemSelector: ((item) => I)
  - - (item): I
    - Parameters
      
      item: T
      
      Returns I
Returns Promise<Record<K, I[]>>
- Defined in packages/util/src/collection.ts:168