Function createCache

2.0.3/2.0.3.js:1168–1180

* 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

()

         *	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