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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/@expo/cli/node_modules/graphql/jsutils

Просмотр файла: promiseReduce.js

"use strict";

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

var _isPromise = _interopRequireDefault(require("./isPromise.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Similar to Array.prototype.reduce(), however the reducing callback may return
 * a Promise, in which case reduction will continue after each promise resolves.
 *
 * If the callback does not return a Promise, then this function will also not
 * return a Promise.
 */
function promiseReduce(values, callback, initialValue) {
  return values.reduce(function (previous, value) {
    return (0, _isPromise.default)(previous) ? previous.then(function (resolved) {
      return callback(resolved, value);
    }) : callback(previous, value);
  }, initialValue);
}

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