From: Josh Cheek <josh.cheek@...>
Date: 2010-09-07T18:41:48+09:00
Subject: Re: Round to two decimal place

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On Tue, Sep 7, 2010 at 3:16 AM, Tom Mac <to.tom.mak@gmail.com> wrote:

> Hi
>   I have a variable  say  @price. It is either blank or has a value. If
> it is blank I have to show it like  $ 0.00  . So I wrote helper like
>
> @price.blank? ? '$'+'0.00' : '$'+@price.to_s
>
>
>     But the problem if @price has value 400.00  , after doing
> @price.to_s  it changes to 400.0  What I want is exactly  400.00 .And if
> I remove to_s above it will throw an error
> can't convert BigDecimal into String
>
>    Please help
> Thanks
> Tom
> --
> Posted via http://www.ruby-forum.com/.
>
>
Based on your use of the word "helper" I assume you're using Rails (this is
not a Rails forum), if that is so, try
http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#method-i-number_to_currency



Otherwise, check out sprintf

require 'bigdecimal'
@price = BigDecimal.new "400.00"
sprintf( "$%.02f" , @price ) # => "$400.00"

For more details on how to create a format string, the docs for sprintf are
pretty good http://ruby-doc.org/ruby-1.9/classes/Kernel.html#M002627

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