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							- 'use strict';
 
- // https://github.com/tc39/proposal-iterator-helpers
 
- // https://github.com/tc39/proposal-array-from-async
 
- var call = require('../internals/function-call');
 
- var aCallable = require('../internals/a-callable');
 
- var anObject = require('../internals/an-object');
 
- var isObject = require('../internals/is-object');
 
- var doesNotExceedSafeInteger = require('../internals/does-not-exceed-safe-integer');
 
- var getBuiltIn = require('../internals/get-built-in');
 
- var getIteratorDirect = require('../internals/get-iterator-direct');
 
- var closeAsyncIteration = require('../internals/async-iterator-close');
 
- var createMethod = function (TYPE) {
 
-   var IS_TO_ARRAY = TYPE === 0;
 
-   var IS_FOR_EACH = TYPE === 1;
 
-   var IS_EVERY = TYPE === 2;
 
-   var IS_SOME = TYPE === 3;
 
-   return function (object, fn, target) {
 
-     anObject(object);
 
-     var MAPPING = fn !== undefined;
 
-     if (MAPPING || !IS_TO_ARRAY) aCallable(fn);
 
-     var record = getIteratorDirect(object);
 
-     var Promise = getBuiltIn('Promise');
 
-     var iterator = record.iterator;
 
-     var next = record.next;
 
-     var counter = 0;
 
-     return new Promise(function (resolve, reject) {
 
-       var ifAbruptCloseAsyncIterator = function (error) {
 
-         closeAsyncIteration(iterator, reject, error, reject);
 
-       };
 
-       var loop = function () {
 
-         try {
 
-           if (MAPPING) try {
 
-             doesNotExceedSafeInteger(counter);
 
-           } catch (error5) { ifAbruptCloseAsyncIterator(error5); }
 
-           Promise.resolve(anObject(call(next, iterator))).then(function (step) {
 
-             try {
 
-               if (anObject(step).done) {
 
-                 if (IS_TO_ARRAY) {
 
-                   target.length = counter;
 
-                   resolve(target);
 
-                 } else resolve(IS_SOME ? false : IS_EVERY || undefined);
 
-               } else {
 
-                 var value = step.value;
 
-                 try {
 
-                   if (MAPPING) {
 
-                     var result = fn(value, counter);
 
-                     var handler = function ($result) {
 
-                       if (IS_FOR_EACH) {
 
-                         loop();
 
-                       } else if (IS_EVERY) {
 
-                         $result ? loop() : closeAsyncIteration(iterator, resolve, false, reject);
 
-                       } else if (IS_TO_ARRAY) {
 
-                         try {
 
-                           target[counter++] = $result;
 
-                           loop();
 
-                         } catch (error4) { ifAbruptCloseAsyncIterator(error4); }
 
-                       } else {
 
-                         $result ? closeAsyncIteration(iterator, resolve, IS_SOME || value, reject) : loop();
 
-                       }
 
-                     };
 
-                     if (isObject(result)) Promise.resolve(result).then(handler, ifAbruptCloseAsyncIterator);
 
-                     else handler(result);
 
-                   } else {
 
-                     target[counter++] = value;
 
-                     loop();
 
-                   }
 
-                 } catch (error3) { ifAbruptCloseAsyncIterator(error3); }
 
-               }
 
-             } catch (error2) { reject(error2); }
 
-           }, reject);
 
-         } catch (error) { reject(error); }
 
-       };
 
-       loop();
 
-     });
 
-   };
 
- };
 
- module.exports = {
 
-   toArray: createMethod(0),
 
-   forEach: createMethod(1),
 
-   every: createMethod(2),
 
-   some: createMethod(3),
 
-   find: createMethod(4)
 
- };
 
 
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