Gets a length property containing the number of arguments the function expects:
function func(a, b, c) {} console.log(func.length); // 3 var myFunc = function () { // serialize the arguments object as a JSON string and use that string as a key in your cache object var cachekey = JSON.stringify(Array.prototype.slice.call(arguments)), if (!myFunc.cache[cachekey]) { var result = {}; // ... expensive operation ... myFunc.cache[cachekey] = result; } return myFunc.cache[cachekey]; }; // cache storage myFunc.cache = {};
References:
JavaScript Patterns - by Stoyan Stefanov (O`Reilly)
转载于:https://www.cnblogs.com/haokaibo/p/A-Memoization-Pattern.html
相关资源：Python Cookbook英文版