sidenote: super cool talk by Bartek Szopka about floating point numbers in JavaScript (and other languages) held at JSConf.eu 2013
https://www.youtube.com/watch?v=MqHDDtVYJRI On 15 November 2013 11:00, Mike Marino <mmar...@gmail.com> wrote: > Hi Pedro, > > On Fri, Nov 15, 2013 at 10:29 AM, Pedro Narciso García Revington > <p.reving...@gmail.com> wrote: > > Hi, > > > > I want to sum decimals with the builtin _sum function. > > My documents look like > > { > > "_id": "7a2c5e50dfeb1341d02aa27c7a05f629", > > "_rev": "4-482ff2f6b6e5c2aa079e3e4114d02093", > > "type": "payment", > > "amount": "0.2" > > } > > I store the numbers as strings because I read this the proper way for > > decimals. > > I would echo Stefan's suggestion in this case since you're dealing > with adding "money" numbers. Otherwise, you have to deal with normal > numerical rounding issues when performing operations on floats. > > > > > If I try to sum them with the builtin _sum I get the following error > > "builtin _sum function requires map values to be numbers" > > > > I removed the quotes from the numbers. Now I can sum them but 0.2 + 0.1 > > equals to 2.99999999 > > Was this a typo? Did you mean 0.2999999 ? > > Cheers, > Mike > -- Andy Wenk Hamburg - Germany RockIt! http://www.couchdb-buch.de http://www.pg-praxisbuch.de GPG fingerprint: C044 8322 9E12 1483 4FEC 9452 B65D 6BE3 9ED3 9588
