27 lines
830 B
JavaScript
27 lines
830 B
JavaScript
var eq = require('./eq');
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* Assigns `value` to `key` of `object` if the existing value is not equivalent
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* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
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* for equality comparisons.
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*
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* @private
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* @param {Object} object The object to modify.
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* @param {string} key The key of the property to assign.
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* @param {*} value The value to assign.
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*/
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function assignValue(object, key, value) {
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var objValue = object[key];
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if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
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(value === undefined && !(key in object))) {
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object[key] = value;
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}
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}
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module.exports = assignValue;
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