Which is theoretically equivalent. Either way, we can implement a BigDecimal (or similar) in terms of a BigInt, which was my point. -----
Isiah Meadows [email protected] Looking for web consulting? Or a new website? Send me an email and we can get started. www.isiahmeadows.com On Sun, Aug 6, 2017 at 9:28 PM, kai zhu <[email protected]> wrote: > no, just use one BigInt padded with a bunch of zeroes (e.g. instead of > $12.34, use 1234000000, and round to nearest integer for division). this is > what i meant by “fixed point” decimal. > for current javascript double-precision numbers, you can do integer > arithmetic up to around 9,007,199,254,000,000 which at my previous company, > was good-enough to use for currency conversions. > >> On Aug 7, 2017, at 2:12 AM, Isiah Meadows <[email protected]> wrote: >> >> FYI, you could create a BigFloat class using two BigInts, one for the >> value, the other for the decimal point position. You could go from >> there to model infinite-precision values, using a bit of math to >> ensure the two fields remain correct. >> ----- >> >> Isiah Meadows >> [email protected] >> >> Looking for web consulting? Or a new website? >> Send me an email and we can get started. >> www.isiahmeadows.com >> >> >> On Fri, Aug 4, 2017 at 11:42 AM, Bruno Jouhier <[email protected]> wrote: >>> BigDecimal is a MUST for accounting. >>> >>> Main reasons: >>> >>> JS number precision is too limited (16 digits) >>> Decimal numbers are not represented "exactly" by JS numbers => comparisons >>> gives surprising results (0.1 + 0.2 !== 0.3). >>> Incorrect roundtrips with SQL Databases: decimals have up to 38 digits >>> precision in Oracle and SQL Server, 65 (!!) in MySQL. >>> >>> JSON serialization is addressed by serializing to string. Like dates (no >>> date literals in JS/JSON). >>> >>> Same for SQL. In the absence of a BigDecimal type on JS side, values are >>> passed as strings. >>> >>> Bruno >>> >>> >>> >>> >>> >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >>> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss > _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
