50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
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'use strict';
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var DESCRIPTORS = require('../internals/descriptors');
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var fails = require('../internals/fails');
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var uncurryThis = require('../internals/function-uncurry-this');
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var objectGetPrototypeOf = require('../internals/object-get-prototype-of');
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var objectKeys = require('../internals/object-keys');
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var toIndexedObject = require('../internals/to-indexed-object');
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var $propertyIsEnumerable = require('../internals/object-property-is-enumerable').f;
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var propertyIsEnumerable = uncurryThis($propertyIsEnumerable);
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var push = uncurryThis([].push);
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// in some IE versions, `propertyIsEnumerable` returns incorrect result on integer keys
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// of `null` prototype objects
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var IE_BUG = DESCRIPTORS && fails(function () {
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// eslint-disable-next-line es/no-object-create -- safe
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var O = Object.create(null);
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O[2] = 2;
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return !propertyIsEnumerable(O, 2);
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});
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// `Object.{ entries, values }` methods implementation
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var createMethod = function (TO_ENTRIES) {
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return function (it) {
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var O = toIndexedObject(it);
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var keys = objectKeys(O);
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var IE_WORKAROUND = IE_BUG && objectGetPrototypeOf(O) === null;
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var length = keys.length;
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var i = 0;
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var result = [];
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var key;
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while (length > i) {
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key = keys[i++];
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if (!DESCRIPTORS || (IE_WORKAROUND ? key in O : propertyIsEnumerable(O, key))) {
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push(result, TO_ENTRIES ? [key, O[key]] : O[key]);
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}
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}
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return result;
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};
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};
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module.exports = {
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// `Object.entries` method
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// https://tc39.es/ecma262/#sec-object.entries
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entries: createMethod(true),
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// `Object.values` method
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// https://tc39.es/ecma262/#sec-object.values
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values: createMethod(false)
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};
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