Cache - A simple caching object with TTL

Install

npm install cache

Cache = require("cache");

c = new Cache(10 * 1000); // Create a cache with 10 second TTL

key = "foo";
val = "something"; // any object

c.put(key, val); // put it in the cache.
// Optional 3rd arg is TTL for just this
// key, e.g.; c.put(key, val, 5 * 1000);

c.get(key); // "something" (less than 10 secs have passed)

// 11 seconds later ...
setTimeout(function() {

c.get(key); // expired out of cache

}, 11 * 1000);

You can also do some other stuff.

c.del(key) // delete key/val before expiry

You can create a cache that will write its contents to a file in
JSON form (not recommended for production purposes):

c = new Cache(10 * 1000, "data.json");

Now, when do anything that changes the contents of the cache,
it will write it to the file "data.json":

c.put(key, val); // data.json appears

Also, the cache will be preloaded from the file when you
instantiate it, if the file is present.