iterama/node/scan.js

Composable functional (async) iterable helpers

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

const scan = (scanFn, initial) => iterable => ({
  *[Symbol.iterator]() {
    let state = initial;
    let i = 0;

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

});

exports.scan = scan;