iterama/native/zip.js

Composable functional (async) iterable helpers

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

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

var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));

var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));

function zip() {
  for (var _len = arguments.length, iterables = new Array(_len), _key = 0; _key < _len; _key++) {
    iterables[_key] = arguments[_key];
  }

  return (0, _defineProperty2.default)({}, Symbol.iterator, _regenerator.default.mark(function _callee() {
    var iterators, values;
    return _regenerator.default.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            iterators = iterables.map(function (i) {
              return i[Symbol.iterator]();
            });
            _context.prev = 1;

          case 2:
            if (!true) {
              _context.next = 10;
              break;
            }

            values = iterators.map(function (i) {
              return i.next();
            });

            if (!values.some(function (v) {
              return v.done;
            })) {
              _context.next = 6;
              break;
            }

            return _context.abrupt("break", 10);

          case 6:
            _context.next = 8;
            return values.map(function (v) {
              return v.value;
            });

          case 8:
            _context.next = 2;
            break;

          case 10:
            _context.prev = 10;
            iterators.forEach(function (i) {
              return i.return == null ? void 0 : i.return();
            });
            return _context.finish(10);

          case 13:
          case "end":
            return _context.stop();
        }
      }
    }, _callee, null, [[1,, 10, 13]]);
  }));
}
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