@effect-ts/system/_mjs/Collections/Immutable/Chunk/api/unfold.mjs

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

// ets_tracing: off
import * as O from "../../../../Option/index.mjs";
import { append_, empty } from "../core.mjs";
/**
 * Constructs a `Chunk` by repeatedly applying the function `f` as long as it
 * returns `Some`.
 */

export function unfold(s, f) {
  let builder = empty();
  let cont = true;
  let s1 = s;

  while (cont) {
    const x = f(s1);

    if (O.isSome(x)) {
      s1 = x[1];
      builder = append_(builder, x[0]);
    } else {
      cont = false;
    }
  }

  return builder;
}
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