Cached jQuery .find and .closest methods. On repeated invokation, returns jQuery objects / DOM references from cache.

script.js

// jQuery warriors, assemble!

$.fn.cachedFind = function (selector) {
  var cache = this.data('cached-find') || {};
  if (undefined === cache[selector]) {
    cache[selector] = this.find(selector);
    this.data('cached-find', cache);
  }
  return cache[selector];
};

$.fn.cachedClosest = function (selector) {
  var cache = this.data('cached-closest') || {};
  if (undefined === cache[selector]) {
    cache[selector] = this.closest(selector);
    this.data('cached-closest', cache);
  }
  return cache[selector];
};