Task | /lib/async/mod.ts | eitherway@0.10.0

method Task.prototype.iter

import { Task } from "https://deno.land/x/eitherway@0.10.0/lib/async/mod.ts";

iter(): AsyncIterableIterator<T>

Use this to obtain an async iterator of the encapsulated value <T>

In case of failure, this method returns the empty AsyncIteratorResult

Examples

Example 1

import { assert } from "../core/assert.ts"
import { Err, Ok, Result, Task } from "https://deno.land/x/eitherway/mod.ts";

const success = Task.succeed(42);
const failure = Task.fail(Error());

async function main() {
  const okIter = success.iter();
  const errIter = failure.iter();

  let okCount = 0;
  let okYieldedValue = undefined;

  for await (const v of okIter) {
    okCount += 1;
    okYieldedValue = v;
  }

  let errCount = 0;
  let errYieldedValue = undefined;

  for await (const v of errIter) {
    errCount += 1;
    errYieldedValue = v;
  }

  assert(okCount === 1);
  assert(okYieldedValue === 42);
  assert(errCount === 0)
  assert(errYieldedValue === undefined);
}

main().then(() => console.log("Done"));

Returns

AsyncIterableIterator<T>