base-conversion-to-dec

base-conversion-to-dec

Auto-curried converter from any base with arbitrary precision support and customisable symbols.

For the opposite behaviour, see base-conversion-from-dec. For any to any base conversions, see base-conversion.

Install

npm i base-conversion-to-dec

Basic usage

var bc = require('base-conversion-to-dec');
var hexToBin = bc(16, 2);

hexToBin('A'); //=> '1010'
hexToBin('1E'); //=> '11110'

See spec.

Fractional support (including bases)

bc(9, '11.08'); //=> '10.098765432098766'

See in wolfram|Alpha.

bc(3.145, '100.01'); //=> '9.992126756390263'

See in wolfram|Alpha.

Custom symbols

For any bases above 62, custom symbols are required. See tests for working examples.

bc.symbols('⓿①②③④⑤⑥⑦⑧⑨ⒶⒷ', 12, '⑥①'); //=> '⑦③'

Arbitrary precision

var Big = require('arbitrary-precision')(require('bigjs-adapter'));
var toBigFactory = require('to-decimal-arbitrary-precision');

var d = toBigFactory(Big);

// avoid large numbers to go into exponential notation (adapter dependent)
Big.Impl.E_POS = 50;

bc.big(d, 9, '802531310452364303450750087576673257456135727727');
//=> '5678364565345634563456346757364563534534645745'

Full raw version

var Big = require('arbitrary-precision')(require('bigjs-adapter'));
var toBigFactory = require('to-decimal-arbitrary-precision');

var d = toBigFactory(Big);

// avoid large numbers to go into exponential notation (adapter dependent)
Big.Impl.E_POS = 50;

bc.raw(d, '01234#6789', 9, '802#313104#23643034#07#0087#766732#74#613#727727');
//=> '#678364#6#34#634#634#63467#7364#63#34#3464#74#'

Defaults

The default symbols and big implementation are exposed as follows:

bc.defaultSymbols; //=> '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
bc.defaultB; //=> default arbitrary precision implementation (plus, times & pow)