Module "indexed"

Const indexed

• indexed<T>(records: Iterable<T>, ks: keyof T[]): EquivMap<{}, Set<T>>

• Takes an iterable of plain objects and array of indexing keys. Calls selectKeysObj on each value and uses returned objects as new keys to group original values. Returns a new EquivMap of sets.

  example

  indexed(
    new Set([{a: 1, b: 1}, {a: 1, b: 2}, {a: 1, b: 1, c: 2}]),
    ["a","b"]
  )
  // EquivMap {
  //   { a: 1, b: 1 } => Set { { a: 1, b: 1 }, { a: 1, b: 1, c: 2 } },
  //   { a: 1, b: 2 } => Set { { a: 1, b: 2 } } }

  Type parameters

  • T: object

  Parameters

  • records: Iterable<T>

    objects to index

  • ks: keyof T[]

    keys used for indexing

  Returns EquivMap<{}, Set<T>>