.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/es.array.iterator.js

   1 'use strict';
   2 var toIndexedObject = require('../internals/to-indexed-object');
   3 var addToUnscopables = require('../internals/add-to-unscopables');
   4 var Iterators = require('../internals/iterators');
   5 var InternalStateModule = require('../internals/internal-state');
   6 var defineIterator = require('../internals/define-iterator');
   7
   8 var ARRAY_ITERATOR = 'Array Iterator';
   9 var setInternalState = InternalStateModule.set;
  10 var getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);
  11
  12 // `Array.prototype.entries` method
  13 // https://tc39.es/ecma262/#sec-array.prototype.entries
  14 // `Array.prototype.keys` method
  15 // https://tc39.es/ecma262/#sec-array.prototype.keys
  16 // `Array.prototype.values` method
  17 // https://tc39.es/ecma262/#sec-array.prototype.values
  18 // `Array.prototype[@@iterator]` method
  19 // https://tc39.es/ecma262/#sec-array.prototype-@@iterator
  20 // `CreateArrayIterator` internal method
  21 // https://tc39.es/ecma262/#sec-createarrayiterator
  22 module.exports = defineIterator(Array, 'Array', function (iterated, kind) {
  23   setInternalState(this, {
  24     type: ARRAY_ITERATOR,
  25     target: toIndexedObject(iterated), // target
  26     index: 0,                          // next index
  27     kind: kind                         // kind
  28   });
  29 // `%ArrayIteratorPrototype%.next` method
  30 // https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
  31 }, function () {
  32   var state = getInternalState(this);
  33   var target = state.target;
  34   var kind = state.kind;
  35   var index = state.index++;
  36   if (!target || index >= target.length) {
  37     state.target = undefined;
  38     return { value: undefined, done: true };
  39   }
  40   if (kind == 'keys') return { value: index, done: false };
  41   if (kind == 'values') return { value: target[index], done: false };
  42   return { value: [index, target[index]], done: false };
  43 }, 'values');
  44
  45 // argumentsList[@@iterator] is %ArrayProto_values%
  46 // https://tc39.es/ecma262/#sec-createunmappedargumentsobject
  47 // https://tc39.es/ecma262/#sec-createmappedargumentsobject
  48 Iterators.Arguments = Iterators.Array;
  49
  50 // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
  51 addToUnscopables('keys');
  52 addToUnscopables('values');
  53 addToUnscopables('entries');