hasharray - npm Package Compare versions

Comparing version 0.1.5 to 0.1.6

package.json

@@ -6,3 +6,3 @@ {
   "description": "A data structure that combines a hash and an array for CRUD operations by object keys or index.",
-  "version": "0.1.5",
+  "version": "0.1.6",
   "main": "index.js",
@@ -9,0 +9,0 @@ "url": "https://github.com/joshjung/hash-array",

src/HashArray.js

@@ -41,2 +41,5 @@ var JClass = require('jclass');
 	},
+  addAll: function (arr) {
+    this.add.apply(this, arr);
+  },
 	addMap: function(key, obj) {
@@ -64,2 +67,33 @@ this._map[key] = obj;
   },
+  getUniqueRandomIntegers: function (count, min, max) {
+    var res = [], map = {};
+
+    count = Math.min(max - min, count);
+    
+    while (res.length < count)
+    {
+      var r = Math.floor(min + (Math.random() * (max + 1)));
+      if (map[r]) continue;
+      map[r] = true;
+      res.push(r);
+    }
+
+    return res;
+  },
+  sample: function (count, keys) {
+    // http://en.wikipedia.org/wiki/Image_(mathematics)
+    var image = this.all,
+      ixs = {},
+      res = [];
+
+    if (keys)
+      image = this.getAll(keys);
+
+    var rand = this.getUniqueRandomIntegers(count, 0, image.length - 1);
+
+    for (var i = 0; i < rand.length; i++)
+      res.push(image[rand[i]]);
+
+    return res;
+  },
 	has: function(key) {
@@ -66,0 +100,0 @@ return this._map.hasOwnProperty(key);

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Improved metrics

Total package byte prevSize

20786

increased by3.77%

Lines of code

501

increased by5.7%

No dependency changes