Rounding problem

Rails
1

Hi,

I have a strange problem with number rounding:
If I try “a_number.round(2)” in console - it works, but the same line
thru passenger fails: “wrong number of arguments (1 for 0)”.
Any ideas why?

I’m running rails 2.3.4 and passenger 2.2.9

2

On Tue, Mar 30, 2010 at 1:21 AM, JanneKo [email protected]
wrote:

Hi,

I have a strange problem with number rounding:
If I try “a_number.round(2)” in console - it works, but the same line
thru passenger fails: “wrong number of arguments (1 for 0)”.
Any ideas why?

I’m running rails 2.3.4 and passenger 2.2.9

Hi, what’s the value of a_number being used?

-Conrad

3

On Mar 30, 9:21 am, JanneKo [email protected] wrote:

Hi,

I have a strange problem with number rounding:
If I try “a_number.round(2)” in console - it works, but the same line
thru passenger fails: “wrong number of arguments (1 for 0)”.
Any ideas why?

Is a_number an integer ?
rails overrides round to allow it to take a precision argument, but it
only does that on Float - Integers still have the standard round
method, which does not take a precision argument.

Fred

4

Thanks for the answers - This solved my problem partly. In database
(mysql) the number is a decimal - but for some reason it seems to be
an integer in rails if it’s decimals are zeros.

Janne

On 30 maalis, 12:30, Frederick C. [email protected]

5

class Float
def round_to(x)
(self * 10x).round.to_f / 10x
end
end

then you can use round_to(2)

Sincerely,

Joel D.
Website Bio: http://jdezenzio.com/
Rails Production Sites: http://ncaastatpages.com

6

what is the range of values that you’re working with? 0 to 100, -3000 to
4000?

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7

On 30 March 2010 15:40, Joel D. [email protected] wrote:

class Float
def round_to(x)
(self * 10x).round.to_f / 10x
end
end

To avoid floating point errors, you might as well just do :
(self * 1.0).round.(x)
or
self.to_f.round.(x)

And wouldn’t that be a patch to class Integer, as Float already has
.round working fine? Or am I missing something ?:-/