初始化

uni_modules/UniDevTools/node_modules/licia/QuickLru.js

@@ -0,0 +1,49 @@
+var isUndef = require('./isUndef');
+var Class = require('./Class');
+exports = Class({
+    initialize: function QuickLru(max) {
+        this._max = max;
+        this._cache = {};
+        this._oldCache = {};
+        this._size = 0;
+    },
+    has: function(key) {
+        return !isUndef(this._cache[key]) || !isUndef(this._oldCache[key]);
+    },
+    remove: function(key) {
+        if (!isUndef(this._cache[key])) this._cache[key] = undefined;
+        if (!isUndef(this._oldCache[key])) this._oldCache[key] = undefined;
+    },
+    get: function(key) {
+        if (!isUndef(this._cache[key])) {
+            return this._cache[key];
+        }
+        var val = this._oldCache[key];
+        if (!isUndef(val)) {
+            this._update(key, val);
+            return val;
+        }
+    },
+    set: function(key, val) {
+        if (!isUndef(this._cache[key])) {
+            this._cache[key] = val;
+        } else {
+            this._update(key, val);
+        }
+    },
+    clear: function() {
+        this._cache = {};
+        this._oldCache = {};
+    },
+    _update: function(key, val) {
+        this._cache[key] = val;
+        this._size++;
+        if (this._size > this._max) {
+            this._size = 0;
+            this._oldCache = this._cache;
+            this._cache = {};
+        }
+    }
+});
+
+module.exports = exports;