baseconvert 1.0.1
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Convert any rational number from any (positive integer) base to any (positive integer) base. Output numbers as List or String.

baseconvert #

Convert any rational number, from any (positive integer) base, to any (positive integer) base. Output numbers as tuple or string.

  • Any rational number
  • Arbitrary precision
  • Fractions
  • Recurring/repeating fractional digits.
  • Input numbers as tuple or string or number.
  • Output numbers as tuple or string.

MIT License (MIT) Copyright (c) 2020 Alex Collette

Github


This repository is a port of Joshua Deakin's baseconvert library for Python.

  • His original repository can be found Here

Usage #


base([15, 15, 0, ".", 8], inBase: 16, outBase: 10);
--> [4, 0, 8, 0, '.', 5]

base("FF0.8", inBase: 16, outBase: 10, string: true);
--> '4080.5'

base("4080.5", inBase: 10, outBase: 16, string: true);
--> 'FF0.8'

List Representation #

Numbers are represented as a sequence of digits. Each digit is a base-10 integer value. The radix point, which separates the integer and fractional parts, is denoted by a String period.

[int, int, int, ... , '.', ... , int, int, int]
[   integer part    , '.',  fractional part   ]

String Representation #

String digits (after z the values are in ascending Unicode):


|  Value  | Representation |
|---------|----------------|
|  0 -  9 |    0  -  9     |
| 10 - 53 |    A  -  Z     |
| 36 - 61 |    a  -  z     |
| 62 +    | unicode 123 +  |

For bases higher than 61 it's recommended to use List representation.

Recurring Digits #

Recurring digits at the end of a fractional part will be enclosed by "[" and "]" in both string and List representation. This behavior can be turned off by setting the recurring argument of base or BaseConverter object to false.

base("0.1", inBase: 3, outBase: 10, string: true);
--> '0.[3]'
base("0.1", inBase: 3, outBase: 10, string: true, recurring: false);
--> '0.3333333333'

Max Fractional Depth #

Integer parts are always of arbitrary size. Fractional depth (number of digits) can must be specified by setting the maxDepth argument of base or a BaseConverter object (default 10).

base("0.2", inBase: 10, outBase: 8);
--> [0, '.', 1, 4, 6, 3, 1, 4, 6, 3, 1, 4]
base("0.2", inBase: 10, outBase: 8, maxDepth=1);
--> [0, '.', 1]

Callable BaseConverter #

An object can also be created. This is useful for when several numbers need to be converted.

BaseConverter b = BaseConverter(inputBase: 16, outputBase: 8);
b("FF");
--> [3, 7, 7]
b([15, 15]);
--> [3, 7, 7]
b("FF") == b([15,15]);
--> true
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Convert any rational number from any (positive integer) base to any (positive integer) base. Output numbers as List or String.

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Documentation

API reference

License

MIT (LICENSE)

Dependencies

flutter

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