From: Justin Collins <collinsj@...>
Date: 2006-07-26T04:11:00+09:00
Subject: Re: Noob devision question

jamiethehutt wrote:
> I'm trying to make a percentage progress bar for an XMMS web interface,
> I want to take the total track time and the elapsed time and then make
> a length for the bar from the percentage completed.
>
> something like:
>
> totalbarsize = 180
> timeelapsed = 10
> totaltime = 30
>
> percomplete = 0.0
> barlength = 0.0
>
> percomplete = timeelapsed / totaltime
> barlength =  totalbarsize*percomplete
>
> puts barlength
>
> Now that should give me a barlength of 60 pixels but it gives 0
> instead. Anyone know what I'm doing wrong?
>
> Thanks!
>
> (I'll forget that I need barlength as an integer rather than a float
> for now :-P)
>
>
>   

timeelapsed and totaltime are Integers. So when you divide them, it does 
integer division:

irb(main):001:0> 10/30
=> 0
irb(main):002:0> 10.0 / 30.0
=> 0.333333333333333


try

percomplete = timeelapsed.to_f / totaltime

or

percomplete = timeelapsed / totaltime.to_f

or

percomplete = timeelapsed.to_f / totaltime.to_f

or

totaltime = 30.0
timeelapsed = 10.0

You get the idea :) Floats for floating point division.

-Justin