iter-tools-es/impls/$first-or/async-first-or.js

The iterable toolbox

const {
  asyncIterableCurry,
  asyncCallReturn
} = require('../../internal/async-iterable.js');

async function __asyncFirstOr(iterable, whenEmpty) {
  const iter = iterable[Symbol.asyncIterator]();
  const {
    value,
    done
  } = await iter.next();
  if (done) return whenEmpty;
  await asyncCallReturn(iter);
  return value;
}

exports.__asyncFirstOr = __asyncFirstOr;
const asyncFirstOr = /*#__PURE__*/asyncIterableCurry(__asyncFirstOr, {
  reduces: true
});
exports.asyncFirstOr = asyncFirstOr;