base62 - npm Package Compare versions

Comparing version 1.1.2 to 1.2.0

base62.js

 module.exports = (function (Base62) {
+    "use strict";
+
     var DEFAULT_CHARACTER_SET = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
@@ -14,14 +16,48 @@
 
-    Base62.decode = function(base62String){
-        var val = 0, base62Chars = base62String.split("").reverse();
-        base62Chars.forEach(function(character, index){
-            val += Base62.characterSet.indexOf(character) * Math.pow(62, index);
-        });
+    var defaultCharsetDecode = function defaultCharsetDecode (base62String) {
+        var value = 0,
+            i = 0,
+            length = base62String.length,
+            charValue;
+
+        for (; i < length; i++) {
+            charValue = base62String.charCodeAt(i);
+
+            if (charValue < 58) {
+                charValue = charValue - 48;
+            } else if (charValue < 91) {
+                charValue = charValue - 29;
+            } else {
+                charValue = charValue - 87;
+            }
+
+            value += charValue * Math.pow(62, length - i - 1);
+        }
+
+        return value;
+    };
+
+    var customCharsetDecode = function customCharsetDecode (base62String) {
+        var val = 0,
+            i = 0,
+            length = base62String.length,
+            characterSet = Base62.characterSet;
+
+        for (; i < length; i++) {
+            val += characterSet.indexOf(base62String[i]) * Math.pow(62, length - i - 1);
+        }
+
         return val;
     };
 
+    var decodeImplementation = null;
+
+    Base62.decode = function(base62String){
+        return decodeImplementation(base62String);
+    };
+
     Base62.setCharacterSet = function(chars) {
         var arrayOfChars = chars.split(""), uniqueCharacters = [];
 
-        if(arrayOfChars.length != 62) throw Error("You must supply 62 characters");
+        if(arrayOfChars.length !== 62) throw Error("You must supply 62 characters");
 
@@ -32,5 +68,7 @@ arrayOfChars.forEach(function(char){
 
-        if(uniqueCharacters.length != 62) throw Error("You must use unique characters.");
+        if(uniqueCharacters.length !== 62) throw Error("You must use unique characters.");
 
         Base62.characterSet = arrayOfChars;
+
+        decodeImplementation = chars === DEFAULT_CHARACTER_SET ? defaultCharsetDecode : customCharsetDecode;
     };
@@ -37,0 +75,0 @@

package.json

@@ -11,3 +11,3 @@ {
   "license": "MIT",
-  "version": "1.1.2",
+  "version": "1.2.0",
   "repository": {
@@ -26,7 +26,8 @@ "type": "git",
   "scripts": {
-    "test": "mocha"
+    "test": "mocha",
+    "benchmark": "node benchmark/benchmarks.js"
   },
   "devDependencies": {
-    "mocha": "~3.1.0"
+    "mocha": "~3.4.1"
   }
 }

Readme.md

 # [Base62.js](http://libraries.io/npm/base62)
 [![build status](https://secure.travis-ci.org/andrew/base62.js.svg)](http://travis-ci.org/andrew/base62.js)
 [![npm version](https://badge.fury.io/js/base62.svg)](http://badge.fury.io/js/base62)
-[![Dependency Status](https://david-dm.org/andrew/base62.js.svg?theme=shields.io)](https://david-dm.org/andrew/base62.js)
 [![devDependency Status](https://david-dm.org/andrew/base62.js/dev-status.svg?theme=shields.io)](https://david-dm.org/andrew/base62.js#info=devDependencies)
@@ -10,2 +9,13 @@ [![Gitter chat](http://img.shields.io/badge/gitter-andrew/base62.js-brightgreen.svg)](https://gitter.im/andrew/base62.js)
 
+## What is Base62 encoding?
+
+From [wikipedia](https://de.wikipedia.org/wiki/Base62):
+
+> Base62 is a priority system to the base 62, which for encoding large numbers using ASCII is character. The digits 0-9 (value 0-9), uppercase letters A-Z (value 10-35) and lowercase letters a-z (value 36-61) are used.
+
+> Due to the high number of base formed shorter strings than with the decimal or hexadecimal system , which mainly offers two advantages:
+
+> - They can be entered by a human being faster and with a smaller risk of error. In this case, a font should be selected in which characters that can be confused, such as small L and large i, or zero, and large O, are distinguishable.
+> - Length restrictions, eg when a number is to be used as part of an identifier or file name, can be bypassed. However, it should be noted that the processing system is case-sensitive.
+
 ## Install
@@ -16,3 +26,8 @@
 ```
+or for yarn:
+```bash
+yarn add base62
+```
 
+
 ## Usage
@@ -19,0 +34,0 @@

test/test.js

@@ -6,2 +6,3 @@ var assert = require('assert');
     it("should encode a number to a Base62 string", function() {
+        assert.equal(Base62.encode(0), '0');
         assert.equal(Base62.encode(999), 'g7');
@@ -18,4 +19,7 @@ assert.equal(Base62.encode(65), '13');
     it("should decode a number from a Base62 string", function() {
+        assert.equal(Base62.decode('0'), 0);
         assert.equal(Base62.decode('g7'), 999);
         assert.equal(Base62.decode('13'), 65);
+        //zero padded strings
+        assert.equal(Base62.decode('0013'), 65);
         //test big numbers
@@ -76,2 +80,2 @@ assert.equal(Base62.decode("2Q3rKTOF"), 10000000000001);
     });
-});
+});

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

25889

increased by128.42%

Number of package files

14

increased by55.56%

Lines of code

161

increased by80.9%

Number of lines in readme file

69

increased by27.78%

No dependency changes