A cache object that deletes the least-recently-used items. 

isaacs

lru-cache

othiym23

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  "description": "A cache object that deletes the least-recently-used items.",

  "author": "Isaac Z. Schlueter <i@izs.me>",

    "test": "tap test --branches=100 --functions=100 --lines=100 --statements=100",

    "posttest": "standard test/*.js lib/*.js"

  "repository": "git://github.com/isaacs/node-lru-cache.git",

[![Build Status](https://travis-ci.org/isaacs/node-lru-cache.svg?branch=master)](https://travis-ci.org/isaacs/node-lru-cache) [![Coverage Status](https://coveralls.io/repos/isaacs/node-lru-cache/badge.svg?service=github)](https://coveralls.io/github/isaacs/node-lru-cache)

              , length: function (n, key) { return n * 2 + key.length }

              , dispose: function (key, n) { n.close() }

  , otherCache = LRU(50) // sets just the max size

cache.set('[object Object]', 'a different value')

assert.equal(cache.get(someObject), 'a value')

If you put more stuff in it, then items will fall out.

If you try to put an oversized thing in it, then it'll fall out right

* `max` The maximum size of the cache, checked by applying the length

  function to all values in the cache.  Not setting this is kind of

  silly, since that's the whole purpose of this lib, but it defaults

* `maxAge` Maximum age in ms.  Items are not pro-actively pruned out

  as they age, but if you try to get an item that is too old, it'll

  drop it and return undefined instead of giving it to you.

* `length` Function that is used to calculate the length of stored

  items.  If you're storing strings or buffers, then you probably want

  to do something like `function(n, key){return n.length}`.  The default is

  `function(){return 1}`, which is fine if you want to store `max`

  like-sized things.  They item is passed as the first argument, and

  like-sized things.  The item is passed as the first argument, and

  the key is passed as the second argumnet.

* `dispose` Function that is called on items when they are dropped

  from the cache.  This can be handy if you want to close file

  descriptors or do other cleanup tasks when items are no longer

  accessible.  Called with `key, value`.  It's called *before*

  actually removing the item from the internal cache, so if you want

  to immediately put it back in, you'll have to do that in a

  `nextTick` or `setTimeout` callback or it won't do anything.

* `stale` By default, if you set a `maxAge`, it'll only actually pull

  stale items out of the cache when you `get(key)`.  (That is, it's

  not pre-emptively doing a `setTimeout` or anything.)  If you set

  `stale:true`, it'll return the stale value before deleting it.  If

  you don't set this, then it'll return `undefined` when you try to

  get a stale entry, as if it had already been deleted.

    Both of these will update the "recently used"-ness of the key.

    They do what you think. `maxAge` is optional and overrides the

    If the key is not found, `get()` will return `undefined`.

    Returns the key value (or `undefined` if not found) without

    updating the "recently used"-ness of the key.

    (If you find yourself using this a lot, you *might* be using the

    wrong sort of data structure, but there are some use cases where

    Clear the cache entirely, throwing away all values.

    Check if a key is in the cache, without updating the recent-ness

* `forEach(function(value,key,cache), [thisp])`

    Just like `Array.prototype.forEach`.  Iterates over all the keys

    in the cache, in order of recent-ness.  (Ie, more recently used

* `rforEach(function(value,key,cache), [thisp])`

    The same as `cache.forEach(...)` but items are iterated over in

    reverse order.  (ie, less recently used items are iterated over

    Return an array of the keys in the cache.

    Return an array of the values in the cache.

    Return total length of objects in cache taking into account

    Return total quantity of objects currently in cache. Note, that

    `stale` (see options) items are returned as part of this item

    Return an array of the cache entries ready for serialization and usage

    Loads another cache entries array, obtained with `sourceCache.dump()`,

    into the cache. The destination cache is reset before loading new entries

    Manually iterates over the entire cache proactively pruning old entries

		{
		"name": "lru-cache",
		"description": "A cache object that deletes the least-recently-used items.",
		"version": "4.0.1",
		"version": "4.0.2",
		"author": "Isaac Z. Schlueter <i@izs.me>",
		@@ -12,3 +12,3 @@ "keywords": [
		"scripts": {
		"test": "tap test --branches=100 --functions=100 --lines=100 --statements=100",
		"test": "tap test --100",
		"posttest": "standard test/.js lib/.js"
		@@ -20,3 +20,3 @@ },
		"standard": "^5.4.1",
		"tap": "^5.1.1"
		"tap": "^8.0.1"
		},
		@@ -23,0 +23,0 @@ "license": "ISC",

		@@ -7,2 +7,8 @@ # lru cache

		## Installation:

		```javascript
		npm install lru-cache --save
		```

		## Usage:
		@@ -49,3 +55,3 @@
		`function(){return 1}`, which is fine if you want to store `max`
		like-sized things. They item is passed as the first argument, and
		like-sized things. The item is passed as the first argument, and
		the key is passed as the second argumnet.
		@@ -52,0 +58,0 @@ * `dispose` Function that is called on items when they are dropped

Fixed alerts

Improved metrics