ts-iterable-functions
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    Function _toMap

    • _toMap<T, TKey>(
          src: Iterable<T>,
          keySelector: IndexedSelector<T, TKey>,
          mapFactory?: MapFactory<TKey>,
      ): Map<TKey, T>

      Materializes a sequence into a map keyed by the projected key selector.

      Type Parameters

      • T

        Element type produced by the source iterable.

      • TKey

        Key type returned by keySelector.

      Parameters

      • src: Iterable<T>

        Source iterable to materialize.

      • keySelector: IndexedSelector<T, TKey>

        Projection invoked with each element and index to produce the map key.

      • OptionalmapFactory: MapFactory<TKey>

        Optional factory controlling the concrete map implementation to instantiate.

      Returns Map<TKey, T>

      A map containing one entry per source element keyed by keySelector.

      If keySelector produces the same key more than once.

      const byId = _toMap(
        [
          { id: 1, name: "Ada" },
          { id: 2, name: "Linus" },
        ],
        (person) => person.id,
        (person) => person.name
      );
      console.log(byId.get(2)); // "Linus"
    • _toMap<T, TKey, TValue>(
          src: Iterable<T>,
          keySelector: IndexedSelector<T, TKey>,
          valueSelector: IndexedSelector<T, TValue>,
          mapFactory?: MapFactory<TKey>,
      ): Map<TKey, TValue>

      Materializes a sequence into a map keyed by the projected key selector.

      Type Parameters

      • T

        Element type produced by the source iterable.

      • TKey

        Key type returned by keySelector.

      • TValue

        Value type stored in the resulting map when valueSelector is supplied.

      Parameters

      • src: Iterable<T>

        Source iterable to materialize.

      • keySelector: IndexedSelector<T, TKey>

        Projection invoked with each element and index to produce the map key.

      • valueSelector: IndexedSelector<T, TValue>

        Optional projection producing the value that should be stored for the key; defaults to the element itself.

      • OptionalmapFactory: MapFactory<TKey>

        Optional factory controlling the concrete map implementation to instantiate.

      Returns Map<TKey, TValue>

      A map containing one entry per source element keyed by keySelector.

      If keySelector produces the same key more than once.

      const byId = _toMap(
        [
          { id: 1, name: "Ada" },
          { id: 2, name: "Linus" },
        ],
        (person) => person.id,
        (person) => person.name
      );
      console.log(byId.get(2)); // "Linus"

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