From: Joao Silva <lists@...>
Date: 2012-10-19T08:05:15+09:00
Subject: Re: Truncate number which ends with 0 decimal

Wybo Dekker wrote in post #1080338:
> On 2012-10-18 22:34, Joao Silva wrote:
>> Hi All.
>>
>> The question is how I can do to truncate a float number ending in 0.
>
> $ irb
>>> class Numeric; def to_2; "%.2f" % self end end
> => nil
>>> 2345.5000.to_2
> => "2345.50"
>>> 2.to_2
> => "2.00"

This code works fine when the decimal ends in zero, but if the decimal
number ends in another, round it, and that's not what I want.

class Numeric
    def to_2
        "%.2f" % self
    end
end

2345.5000.to_2  ==>> 2345.50 is ok.
2345.5876374536 ==>> 2345.59 ==>> is wrong ==>> should be 2345.58

1234.567889 ==>> 1234.57 ==>> is wrong ==>> should be 1234.56
2659876.76789999 ==>> 2659876.77 ==> is wrong ==>> should be 2659876.76

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