Well, I'm using a big integer library for accounting in Ruby, but I'm not sure how to do map-reduce with JavaScript without potentially corrupting values... what is the recommended approach?
Also, what is the precision of _sum and other builtin reductions? Is there a recommended big integer library for use with the JavaScript/SpiderMonkey interpreter and is this documented anywhere? With the natural JSON format, I assume there are no limitations to integer size, but clearly JSON -> JavaScript object will impose some data type limitations... it seems like a language with built in support for big integers would be ideal, e.g. Python, Ruby, rather than JavaScript. Kind regards, Samuel On 17 July 2012 02:27, Robert Newson <[email protected]> wrote: > > Correct, numeric precision using the javascript view engine is limited to > the 64-bit floating point numbers that spidermonkey supports. > > For arbitrary precision math, encode your values as strings and use a > bignum library. > > As an aside, if you're using floating-point numbers in an accounting > context, you have already fallen into sin. > > B. > > On 16 Jul 2012, at 15:01, Samuel Williams wrote: > > > Hi, > > > > I'm wondering, when using the JavaScript backend, is the numerical > accuracy > > limited to that of JavaScript? > > > > How can we implement a numerically correct sum function, e.g. using a big > > integer implementation? > > > > Kind regards, > > Samuel > >
