# baseconvert 1.0.2 baseconvert: ^1.0.2 copied to clipboard

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

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

- His original repository can be found Here

## Usage #

```
// base(number, {inBase=10, outBase=10, maxDepth=10, string=false, recurring=true})
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(inBase: 16, outBase: 8);
b.convert("FF");
--> [3, 7, 7]
b.convert([15, 15]);
--> [3, 7, 7]
b.convert("FF") == b([15,15]);
--> true
```