Package Exports
- power-radix
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Readme
power-radix
Library for converting numbers from one radix representation (encoding) to another, with optional custom defined encodings. Inspired by rubyworks/radix.
Features
- Convert to and from any base.
- Define custom encoding and character sets.
Usage
Base conversions with ASCII ordered notations are easy in Javascript.
(255).toString(16) === 'ff'
parseInt('ff', 16) === 255But JavaScript limits you to radix values 2 - 36.
(255).toString(37) // errorpower-radix provides the means of converting to and from any base.
For example, a number in base 256 can be representated by the array [100, 10] (Math.pow(100, 256) +
Math.pow(10, 1)) and can be converted to base 10.
// as an array
new PowerRadix([100, 10], 256).toArray(10); // ['2', '5', '6', '1', '0']
// or as a string
new PowerRadix([100, 10], 256).toString(10); // "25610"power-radix also supports custom character encodings as base and targed radixes. By default,
power-radix uses the following character encoding:0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
You can optionally specify an array of characters to use as symbols for a radix to give your output a custom encoding.
var base = ['Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P'];
new PowerRadix([1, 0], 10).toArray(base); // ['W', 'Q']
new PowerRadix('10', 10).toArray(base); // ['W', 'Q']
new PowerRadix(10, 10).toArray(base); // ['W', 'Q']
new PowerRadix([1, 0], 10).toString(base); // "WQ"
new PowerRadix('10', 10).toString(base); // "WQ"
new PowerRadix(10, 10).toString(base); // "WQ"Or specify an array of characters to use as symbols for the base radix
var base = ['Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P'];
var stdBase10 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
new PowerRadix(base, ['W', 'Q']).toArray(stdBase10); // [1, 0]
new PowerRadix(base.join(''), ['W', 'Q']).toArray(10); // [1, 0]
new PowerRadix(base, ['W', 'Q']).toString(stdBase10); // "10"
new PowerRadix(base.join(''), ['W', 'Q']).toString(10); // "10"Installing
$ npm install power-radixTesting
// Tests + coverage reports are run using Lab
$ npm test