Function createCache

2.0.3/Sizzle.js:301–313

* Create key-value caches of limited size * @returns {Function(string, Object)} Returns the Object data after storing it on itself with * property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength) * deleting the oldest entry

()

         */

        function createCache() {
            var keys = [];

            function cache(key, value) {
                // Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
                if (keys.push(key += " ") > Expr.cacheLength) {
                    // Only keep the most recent entries
                    delete cache[keys.shift()];
                }
                return (cache[key] = value);
            }
            return cache;
        }

        /**
         * Mark a function for special use by Sizzle