优化

MrShi

7 天以前 1ab34d6347171b10acf78fcd3d6678eac0483bae

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'use strict';
var $ = require('../internals/export');
var call = require('../internals/function-call');
var iterate = require('../internals/iterate');
var aCallable = require('../internals/a-callable');
var anObject = require('../internals/an-object');
var getIteratorDirect = require('../internals/get-iterator-direct');
var iteratorClose = require('../internals/iterator-close');
var iteratorHelperWithoutClosingOnEarlyError = require('../internals/iterator-helper-without-closing-on-early-error');
 
var forEachWithoutClosingOnEarlyError = iteratorHelperWithoutClosingOnEarlyError('forEach', TypeError);
 
// `Iterator.prototype.forEach` method
// https://tc39.es/ecma262/#sec-iterator.prototype.foreach
$({ target: 'Iterator', proto: true, real: true, forced: forEachWithoutClosingOnEarlyError }, {
  forEach: function forEach(fn) {
    anObject(this);
    try {
      aCallable(fn);
    } catch (error) {
      iteratorClose(this, 'throw', error);
    }
 
    if (forEachWithoutClosingOnEarlyError) return call(forEachWithoutClosingOnEarlyError, this, fn);
 
    var record = getIteratorDirect(this);
    var counter = 0;
    iterate(record, function (value) {
      fn(value, counter++);
    }, { IS_RECORD: true });
  }
});