Merge pull request #3 from duhaime/math-pow

Math pow

package.json

@@ -1,7 +1,9 @@
 {
   "name": "minhash",
-  "version": "0.0.8",
+  "version": "0.0.9",
+  "author": "Douglas Duhaime <douglas.duhaime@gmail.com>",
   "description": "Find similar documents quickly",
+  "license": "MIT",
   "main": "index.js",
   "scripts": {
     "test": "./node_modules/mocha/bin/mocha ./tests/*.js",
@@ -22,8 +24,7 @@
     "webpack": "^4.1.1",
     "webpack-cli": "^2.0.10"
   },
-  "author": "Douglas Duhaime <douglas.duhaime@gmail.com>",
-  "license": "MIT",
+  "dependencies": {},
   "babel": {
     "presets": [
       "env"

src/minhash.js

@@ -9,7 +9,7 @@ var Minhash = function(config) {
   // prime is the smallest prime larger than the largest
   // possible hash value (max hash = 32 bit int)
   this.prime = 4294967311;
-  this.maxHash = 2**32-1;
+  this.maxHash = Math.pow(2, 32) - 1;
 
   // initialize the hash values as the maximum value
   this.inithashvalues = function() {
@@ -51,14 +51,14 @@ var Minhash = function(config) {
   this.hash = function(str) {
     var hash = 0;
     if (str.length == 0) {
-      return hash + (2**32/2-1);
+      return hash + this.maxHash;
     }
     for (var i = 0; i < str.length; i++) {
       var char = str.charCodeAt(i);
       hash = ((hash<<5)-hash)+char;
       hash = hash & hash; // convert to a 32bit integer
     }
-    return hash + (2**32/2-1);
+    return hash + this.maxHash;
   }
 
   // estimate the jaccard similarity to another minhash