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68 lines
1.9 KiB
68 lines
1.9 KiB
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var $TypeError = GetIntrinsic('%TypeError%'); |
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var callBound = require('call-bind/callBound'); |
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var forEach = require('../helpers/forEach'); |
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var OwnPropertyKeys = require('../helpers/OwnPropertyKeys'); |
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var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable'); |
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var CreateDataProperty = require('./CreateDataProperty'); |
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var Get = require('./Get'); |
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var IsArray = require('./IsArray'); |
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var IsInteger = require('./IsInteger'); |
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var IsPropertyKey = require('./IsPropertyKey'); |
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var SameValue = require('./SameValue'); |
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var ToNumber = require('./ToNumber'); |
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var ToObject = require('./ToObject'); |
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var Type = require('./Type'); |
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// https://262.ecma-international.org/9.0/#sec-copydataproperties |
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module.exports = function CopyDataProperties(target, source, excludedItems) { |
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if (Type(target) !== 'Object') { |
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throw new $TypeError('Assertion failed: "target" must be an Object'); |
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} |
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if (!IsArray(excludedItems)) { |
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throw new $TypeError('Assertion failed: "excludedItems" must be a List of Property Keys'); |
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} |
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for (var i = 0; i < excludedItems.length; i += 1) { |
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if (!IsPropertyKey(excludedItems[i])) { |
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throw new $TypeError('Assertion failed: "excludedItems" must be a List of Property Keys'); |
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} |
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} |
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if (typeof source === 'undefined' || source === null) { |
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return target; |
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} |
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var fromObj = ToObject(source); |
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var sourceKeys = OwnPropertyKeys(fromObj); |
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forEach(sourceKeys, function (nextKey) { |
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var excluded = false; |
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forEach(excludedItems, function (e) { |
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if (SameValue(e, nextKey) === true) { |
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excluded = true; |
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} |
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}); |
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var enumerable = $isEnumerable(fromObj, nextKey) || ( |
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// this is to handle string keys being non-enumerable in older engines |
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typeof source === 'string' |
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&& nextKey >= 0 |
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&& IsInteger(ToNumber(nextKey)) |
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); |
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if (excluded === false && enumerable) { |
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var propValue = Get(fromObj, nextKey); |
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CreateDataProperty(target, nextKey, propValue); |
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} |
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}); |
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return target; |
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};
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