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Avoid skipping set of -0 when an existing +0 exists. [closes #3798]

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John-David Dalton
2018-05-18 08:36:35 -07:00
parent aff1928482
commit 92a6575137
1 changed files with 7 additions and 5 deletions
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12
.internal/assignValue.js
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@@ -5,9 +5,7 @@ import eq from '../eq.js'
const hasOwnProperty = Object.prototype.hasOwnProperty const hasOwnProperty = Object.prototype.hasOwnProperty
/** /**
* Assigns `value` to `key` of `object` if the existing value is not equivalent * Assigns `value` to `key` of `object` if the existing value is not equivalent.
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons.
* *
* @private * @private
* @param {Object} object The object to modify. * @param {Object} object The object to modify.
@@ -16,8 +14,12 @@ const hasOwnProperty = Object.prototype.hasOwnProperty
*/ */
function assignValue(object, key, value) { function assignValue(object, key, value) {
const objValue = object[key] const objValue = object[key]
if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
(value === undefined && !(key in object))) { if (!(hasOwnProperty.call(object, key) && eq(objValue, value))) {
if (value !== 0 || (1 / value) == (1 / objValue)) {
baseAssignValue(object, key, value)
}
} else if (value === undefined && !(key in object)) {
baseAssignValue(object, key, value) baseAssignValue(object, key, value)
} }
} }