@effect-ts/system/_mjs/Managed/forEach.mjs

Effect-TS is a zero dependency set of libraries to write highly productive, purely functional TypeScript at scale.

// ets_tracing: off
import { unzip } from "../Collections/Immutable/Chunk/api/unzip.mjs";
import * as Chunk from "../Collections/Immutable/Chunk/core.mjs";
import * as Tp from "../Collections/Immutable/Tuple/index.mjs";
import { sequential } from "../Effect/ExecutionStrategy.mjs";
import { makeManagedReleaseMap, mapM_ } from "./core.mjs";
import * as T from "./deps.mjs";
import { managedApply } from "./managed.mjs";
/**
 * Applies the function `f` to each element of the `Iterable<A>` and
 * returns the results in a new `B[]`.
 *
 * For a parallel version of this method, see `forEachPar`.
 * If you do not need the results, see `forEachUnit` for a more efficient implementation.
 *
 * @ets_data_first forEach_
 */

export function forEach(f, __trace) {
  return as => forEach_(as, f, __trace);
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` and
 * returns the results in a new `B[]`.
 *
 * For a parallel version of this method, see `forEachPar_`.
 * If you do not need the results, see `forEachUnit_` for a more efficient implementation.
 */

export function forEach_(as, f, __trace) {
  return managedApply(T.map_(T.forEach_(as, a => f(a).effect, __trace), res => {
    const fins = Chunk.map_(res, k => k.get(0));
    const as = Chunk.map_(res, k => k.get(1));
    return Tp.tuple(e => T.forEach_(Chunk.reverse(fins), fin => fin(e), __trace), as);
  }));
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` in parallel,
 * and returns the results in a new `readonly B[]`.
 *
 * For a sequential version of this method, see `forEach`.
 */

export function forEachExec_(as, es, f, __trace) {
  switch (es._tag) {
    case "Sequential":
      {
        return forEach_(as, f, __trace);
      }

    case "Parallel":
      {
        return forEachPar_(as, f, __trace);
      }

    case "ParallelN":
      {
        return forEachParN_(as, es.n, f, __trace);
      }
  }
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` in parallel,
 * and returns the results in a new `readonly B[]`.
 *
 * For a sequential version of this method, see `forEach`.
 *
 * @ets_data_first forEachExec_
 */

export function forEachExec(es, f, __trace) {
  return as => forEachExec_(as, es, f, __trace);
}
/**
 * Applies the function `f` to each element of the `Iterable[A]` and runs
 * produced effects sequentially.
 *
 * Equivalent to `forEach(as)(f).unit`, but without the cost of building
 * the list of results.
 */

export function forEachUnit_(as, f, __trace) {
  return managedApply(T.map_(T.forEach_(as, a => f(a).effect, __trace), result => {
    const {
      tuple: [fins]
    } = unzip(result);
    return Tp.tuple(e => T.forEach_(Chunk.reverse(fins), f => f(e), __trace), undefined);
  }));
}
/**
 * Applies the function `f` to each element of the `Iterable[A]` and runs
 * produced effects sequentially.
 *
 * Equivalent to `forEach(as)(f).unit`, but without the cost of building
 * the list of results.
 *
 * @ets_data_first forEachUnit_
 */

export function forEachUnit(f, __trace) {
  return as => forEachUnit_(as, f, __trace);
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` in parallel,
 * and returns the results in a new `B[]`.
 *
 * For a sequential version of this method, see `forEach`.
 *
 * @ets_data_first forEachPar_
 */

export function forEachPar(f, __trace) {
  return as => forEachPar_(as, f, __trace);
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` in parallel,
 * and returns the results in a new `B[]`.
 *
 * For a sequential version of this method, see `forEach_`.
 */

export function forEachPar_(as, f, __trace) {
  return mapM_(makeManagedReleaseMap(T.parallel, __trace), parallelReleaseMap => {
    const makeInnerMap = T.provideSome_(T.map_(makeManagedReleaseMap(sequential).effect, ({
      tuple: [_, x]
    }) => x), x => Tp.tuple(x, parallelReleaseMap));
    return T.forEachPar_(as, a => T.map_(T.chain_(makeInnerMap, innerMap => T.provideSome_(f(a).effect, u => Tp.tuple(u, innerMap))), ({
      tuple: [_, b]
    }) => b));
  });
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` in parallel,
 * and returns the results in a new `B[]`.
 *
 * Unlike `forEachPar`, this method will use at most up to `n` fibers.
 *
 * @ets_data_first forEachParN_
 */

export function forEachParN(n, f, __trace) {
  return as => forEachParN_(as, n, f, __trace);
}
/**
 * Applies the function `f` to each element of the `Iterable<A>` in parallel,
 * and returns the results in a new `B[]`.
 *
 * Unlike `forEachPar_`, this method will use at most up to `n` fibers.
 */

export function forEachParN_(as, n, f, __trace) {
  return mapM_(makeManagedReleaseMap(T.parallelN(n), __trace), parallelReleaseMap => {
    const makeInnerMap = T.provideSome_(T.map_(makeManagedReleaseMap(sequential).effect, ({
      tuple: [_, x]
    }) => x), x => Tp.tuple(x, parallelReleaseMap));
    return T.forEachParN_(as, n, a => T.map_(T.chain_(makeInnerMap, innerMap => T.provideSome_(f(a).effect, u => Tp.tuple(u, innerMap))), ({
      tuple: [_, b]
    }) => b));
  });
}
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