lodash/_memoizeCapped.js

import memoize from './memoize.js';

/** Used as the maximum memoize cache size. */
const MAX_MEMOIZE_SIZE = 500;

/**
 * A specialized version of `memoize` which clears the memoized function's
 * cache when it exceeds `MAX_MEMOIZE_SIZE`.
 *
 * @private
 * @param {Function} func The function to have its output memoized.
 * @returns {Function} Returns the new memoized function.
 */
function memoizeCapped(func) {
  const result = memoize(func, key => {
    if (cache.size === MAX_MEMOIZE_SIZE) {
      cache.clear();
    }
    return key;
  });

  const cache = result.cache;
  return result;
}

export default memoizeCapped;