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

isaacs

lru-cache

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;(function () { // closure for web browsers

if (typeof module === 'object' && module.exports) {

  // just set the global for non-node platforms.

  return Object.prototype.hasOwnProperty.call(obj, key)

  var lengthCalculator = options.length || naiveLength

  if (typeof lengthCalculator !== "function") {

  if (!max || !(typeof max === "number") || max <= 0 ) {

    // a little bit silly.  maybe this should throw?

  var allowStale = options.stale || false

  var cache = Object.create(null) // hash of items by key

    , lruList = Object.create(null) // list of items in order of use recency

    , length = 0 // number of items in the list

  // resize the cache when the max changes.

        if (!mL || !(typeof mL === "number") || mL <= 0 ) mL = Infinity

        // if it gets above double max, trim right away.

        // otherwise, do it whenever it's convenient.

  // resize the cache when the lengthCalculator changes.

  Object.defineProperty(this, "lengthCalculator",

            cache[key].length = lengthCalculator(cache[key].value)

    , get : function () { return lengthCalculator }

    { get : function () { return length }

  Object.defineProperty(this, "itemCount",

    { get : function () { return itemCount }

// classy, since V8 prefers predictable objects.

function Entry (key, value, mru, len, age) {

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

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

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

    "url": "http://github.com/isaacs/node-lru-cache/raw/master/LICENSE"

		@@ -223,2 +223,3 @@ ;(function () { // closure for web browsers
		length -= hit.length
		itemCount --
		delete cache[ hit.key ]
		@@ -225,0 +226,0 @@ delete lruList[k]

		{
		"name": "lru-cache",
		"description": "A cache object that deletes the least-recently-used items.",
		"version": "2.2.1",
		"version": "2.2.2",
		"author": "Isaac Z. Schlueter <i@izs.me>",
		@@ -6,0 +6,0 @@ "scripts": {

Improved metrics