Radix

DESCRIPTION

Radix provides the means of converting to and from any base.

In addition, representational notations need not be in ASCII order –any user-defined notation can be used up to base 62.

FEATURES/ISSUES

  • Convert to and from any base.

  • Define custom character sets.

  • Can be used to encode/decode strings.

  • Very intuitive API.

RELEASE NOTES

Please see the HISTORY.rdoc file.

SYNOPSIS

Base conversions with ASCII ordered notations are easy in Ruby.

255.to_s(16)   #=> "FF"
"FF".to_i(16)  #=> 255

But Ruby reaches it’s limit at base 36.

255.to_s(37)   #=> Error

Radix provides the means of converting to and from any base.

For example, a number in base 256 can be represented by the array [100, 10] (ie. 100**256 + 10**1) and can be convert to base 10.

[100,10].b(256).to_a(10)  #=> [2,5,6,1,0]

Or, to get a string representation for any base upto 62.

[100,10].b(256).to_s(10)  #=> "25610"

A string representation of anumber can be converted too, again, upto base 62.

"10".b(62).to_s(10)  #=> "62"

To use a custom character set, use an array of characters as the base rather than an integer. For example we can convert a base 10 number to another base 10 number using a different encoding.

base = [:Q, :W, :E, :R, :T, :Y, :U, :I, :O, :U]

"10".b(10).to_a(base)  #=> [:W, :Q]

To learn more have a look at the QED.

HOW TO INSTALL

To install with RubyGems simply open a console and type:

$ gem install radix

Radix follows Ruby Setup package standard.

LICENSE/COPYRIGHT

Copyright © 2009 Thomas Sawyer

This program is ditributed unser the terms of the Apache 2.0 license.

See LICENSE file for details.