Java DecimalFormat implemented in JavaScript

#1

Post by yalimgerger » Thu, Feb 10, 2011, 2:30 PM UTC

Java DecimalFormat implemented in JavaScript
gergerconsulting.blogspot.com

Re: Java DecimalFormat implemented in JavaScript

#2

Post by euroclydon » Thu, Feb 10, 2011, 3:34 PM UTC

Why not just use Javascript sprintf?

http://www.diveintojavascript.com/projects/javascript-sprint...

Re: Java DecimalFormat implemented in JavaScript

#3

Post by bluedevil2k » Thu, Feb 10, 2011, 3:45 PM UTC

Here's a much more robust number formatter for JavaScript, written as a jQuery plugin.

http://code.google.com/p/jquery-numberformatter/

Re: Java DecimalFormat implemented in JavaScript

#4

Post by huherto » Thu, Feb 10, 2011, 3:49 PM UTC

euroclydon wrote: post #2

Why not just use Javascript sprintf? http://www.diveintojavascript.com/projects/javascript-sprint...

In the case of currency, it is better to use decimal arithmetic because if you use float numbers the rounding behaves different than doing the same operations by hand or in a calculator. Another option is to use integers (to represent number of cents) and just print the decimal point when displaying the number.

Re: Java DecimalFormat implemented in JavaScript

#5

Post by euroclydon » Thu, Feb 10, 2011, 4:14 PM UTC

huherto wrote: post #4

euroclydon wrote: post #2

Why not just use Javascript sprintf? http://www.diveintojavascript.com/projects/javascript-sprint...

In the case of currency, it is better to use decimal arithmetic because if you use float numbers the rounding behaves different than doing the same operations by hand or in a calculator. Another option is to use integers (to represent number of cents) and just print the decimal point when displaying the number.

I'm not sure if you're answering my question or not. I've inspected the source of both libraries, and they both use the JS method toFixed().

Re: Java DecimalFormat implemented in JavaScript

#6

Post by huherto » Thu, Feb 10, 2011, 8:55 PM UTC

euroclydon wrote: post #5

huherto wrote: post #4

Earlier quoted context omitted.

In the case of currency, it is better to use decimal arithmetic because if you use float numbers the rounding behaves different than doing the same operations by hand or in a calculator. Another option is to use integers (to represent number of cents) and just print the decimal point when displaying the number.

I'm not sure if you're answering my question or not. I've inspected the source of both libraries, and they both use the JS method toFixed().

Never mind, you are right it is just to format decimals.

Re: Java DecimalFormat implemented in JavaScript

#7

Post by serdarbicer » Thu, Feb 10, 2011, 9:32 PM UTC

euroclydon wrote: post #2

Why not just use Javascript sprintf? http://www.diveintojavascript.com/projects/javascript-sprint...

I'm not sure that it does the same job.

Re: Java DecimalFormat implemented in JavaScript

#8

Post by oskansavli » Fri, Feb 11, 2011, 1:31 PM UTC

euroclydon wrote: post #2

Why not just use Javascript sprintf? http://www.diveintojavascript.com/projects/javascript-sprint...

As stated in the blog, the Formspider framework had a Java renderer that uses DecimalFormat and we needed the same functionality on the javascript side which means formatting numbers with variable masks such as "$#,#00.0#" or "00.0##%" that is defined by the user. So sprintf is not the same. By the way, this code was wrtiten in 2008.