27 lines
950 B
JavaScript
27 lines
950 B
JavaScript
/** Used for native 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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* Used by `_.template` to customize its `_.assign` use.
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*
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* **Note:** This function is like `assignDefaults` except that it ignores
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* inherited property values when checking if a property is `undefined`.
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*
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* @private
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* @param {*} objectValue The destination object property value.
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* @param {*} sourceValue The source object property value.
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* @param {string} key The key associated with the object and source values.
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* @param {Object} object The destination object.
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* @returns {*} Returns the value to assign to the destination object.
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*/
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function assignOwnDefaults(objectValue, sourceValue, key, object) {
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return (objectValue === undefined || !hasOwnProperty.call(object, key))
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? sourceValue
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: objectValue;
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}
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module.exports = assignOwnDefaults;
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