iterama/node/scan-async.js

Composable functional (async) iterable helpers

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.scanAsync = void 0;

const scanAsync = (scanFn, initial) => iterable => ({
  async *[Symbol.asyncIterator]() {
    let state = await initial;
    let i = 0;

    for await (const value of iterable) {
      state = await scanFn(state, value, i++);
      yield state;
    }
  }

});

exports.scanAsync = scanAsync;