Hi All
I have a idea that I am doing and it is working so far but when it
comes to displaying the data that I am getting
with the maths that I am doing I am not getting the same result.
This is what I have
@arrived = @worksheet.time_arrived_customer
@left = @worksheet.time_left_office
@left_cust = @worksheet.time_left_customer
@travel = ((@arrived - @left) * 2)
@worked = (@left_cust - @arrived)
@total = (@travel + @worked) / 60
So what I did was in the DB I am saving the hours in their minute
form.
08:00 = 480 min
08:15 = 495 min
And so on.
I am 100% sure the maths is working as I firstly did it on paper and
took those steps and put them into the action.
When it comes to the display I am superpose to get 2.75 but I only see
2 why is that
I have looked at number_with_precision but rather then getting 2.75 I
get 2.00
Any Ideas would be appreciated.
Regards
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On Sep 8, 9:37 am, Eugene de Winnaar <edalb1...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > I am 100% sure the maths is working as I firstly did it on paper and > took those steps and put them into the action. > > When it comes to the display I am superpose to get 2.75 but I only see > 2 why is thatby default if you are working with integers you''ll always get integers back (by truncation). If you want floating point numbers then you should convert the numbers you''re working with to floating point numbers first (using to_f), so 5 /2 will always return 2, but 5.0 / 2 will produce 2.5> > I have looked at number_with_precision but rather then getting 2.75 I > get 2.00number_with_precision is for formatting a number, you still need to actually have a number with the floating point component. Fred> > Any Ideas would be appreciated. > > Regards-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Without the code used in the display action it''s difficult to know what''s going on but I''d guess you''re using an integer at some point and that causes loss of precision. On Sep 8, 4:37 am, Eugene de Winnaar <edalb1...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Hi All > > I have a idea that I am doing and it is working so far but when it > comes to displaying the data that I am getting > with the maths that I am doing I am not getting the same result. > > This is what I have > > @arrived = @worksheet.time_arrived_customer > @left = @worksheet.time_left_office > > @left_cust = @worksheet.time_left_customer > > @travel = ((@arrived - @left) * 2) > @worked = (@left_cust - @arrived) > > @total = (@travel + @worked) / 60 > > So what I did was in the DB I am saving the hours in their minute > form. > > 08:00 = 480 min > 08:15 = 495 min > > And so on. > > I am 100% sure the maths is working as I firstly did it on paper and > took those steps and put them into the action. > > When it comes to the display I am superpose to get 2.75 but I only see > 2 why is that > > I have looked at number_with_precision but rather then getting 2.75 I > get 2.00 > > Any Ideas would be appreciated. > > Regards-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Frederick Cheung wrote in post #1020782:> by default if you are working with integers you''ll always get integers > back (by truncation). If you want floating point numbers then you > should convert the numbers you''re working with to floating point > numbers first (using to_f), so > > 5 /2 will always return 2, but 5.0 / 2 will produce 2.5This might also help to clarify what''s happening: $ irb ruby-1.9.2-p290 :014 > x = 5 => 5 ruby-1.9.2-p290 :015 > y = 3 => 3 ruby-1.9.2-p290 :016 > z = x / y => 1 ruby-1.9.2-p290 :017 > x.class => Fixnum ruby-1.9.2-p290 :018 > y.class => Fixnum ruby-1.9.2-p290 :019 > z.class => Fixnum ruby-1.9.2-p290 :020 > x = 5 => 5 ruby-1.9.2-p290 :021 > y = 3.0 => 3.0 ruby-1.9.2-p290 :022 > z = x / y => 1.6666666666666667 ruby-1.9.2-p290 :023 > x.class => Fixnum ruby-1.9.2-p290 :024 > y.class => Float ruby-1.9.2-p290 :025 > z.class => Float ruby-1.9.2-p290 :026 > x = 5 => 5 ruby-1.9.2-p290 :027 > y = 3 => 3 ruby-1.9.2-p290 :028 > z = x.fdiv(y) => 1.6666666666666667 ruby-1.9.2-p290 :029 > x.class => Fixnum ruby-1.9.2-p290 :030 > y.class => Fixnum ruby-1.9.2-p290 :031 > z.class => Float ruby-1.9.2-p290 :032 > z = x.quo(y) => (5/3) ruby-1.9.2-p290 :033 > z.class => Rational ruby-1.9.2-p290 :034 > z.to_f => 1.6666666666666667 ruby-1.9.2-p290 :035 > z.to_i => 1 -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.