Big Decimal Test

BigDecimalTest.js

var BigDecimal = require('js-big-decimal')
var array = [255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255]

var decimal = new BigDecimal(0)
var _256 = new BigDecimal(256)

array.map((value => {
    decimal = decimal.multiply(_256)
    decimal = decimal.add(new BigDecimal(value))
}))
console.log(decimal)

var zero = new BigDecimal(0)

var resultArray = []

while (decimal.compareTo(zero) > 0) {
    var modulus = decimal.modulus(_256)
    var modulusNum = new Number(modulus.getValue())
    resultArray.push(modulusNum)
    decimal = decimal
        .subtract(modulus)
        .divide(_256)
        .round(0)
}

resultArray = resultArray.reverse()

console.log("Result array: " + resultArray.join(', '))

resultArray.map((value, index) => {
    if (value != array[index]) {
        console.log('math is broken')
    } else {
        console.log('math rules')
    }
})