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21 lines
547 B
JavaScript
21 lines
547 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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* Checks if a cached value for `key` exists.
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*
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* @private
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* @name has
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* @memberOf _.memoize.Cache
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* @param {string} key The key of the entry to check.
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* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
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*/
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function mapHas(key) {
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return key != '__proto__' && hasOwnProperty.call(this.__data__, key);
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}
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module.exports = mapHas;
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