load() methods

[mikeal]

We have .dump() and .dumpLRU, would be nice if you could do something like.

var lru = require('lru-cache').load(JSON.parse(fs.readFileSync('./dump.json').toString()))

Maybe a matching one for loadLRU.

[isaacs]

Yes, that'd be nice.

[isaacs]

I looked into this a tiny bit, and it's surprisingly tricky to get right. You have to serialize not just the cache entries and lru list, but all the counters and whatnot as well.

[satazor]

This would be very useful, making lru persistant in disk.

[johann8384]

It seems useful on the surface, but it's probably not really all THAT useful, because if you need/want it to persist to disk, then another tool is probably better suited. Something like MemcacheDB or Redis.

[isaacs]

This was added in #40.