From: "Wayne E. Seguin" <wayneeseguin@...>
Date: 2007-07-08T00:08:04+09:00
Subject: Re: array and data types

--Apple-Mail-3--644740706
Content-Transfer-Encoding: 7bit
Content-Type: text/plain;
	charset=US-ASCII;
	delsp=yes;
	format=flowed

On Jul 07, 2007, at 10:56 , zabouth wrote:
> i have looked at all the ruby manual but i cant find no way of doing
> this I am very new to ruby
> so here is my problem
> ok first here is my code
>
> sum = "5:5:5"
> sum = sum.split(":")
> sum = sum.inject {|sum, x| sum + x }
> puts sum
>
> problem is that when you use split it splits the values into strings
> what i need to know is how do i change all the values in the array sum
> eg
> "5","5","5"
> to floating point numbers
> i just cant work it out any help would be much appreciated

Well first your fix:

puts "5:5:5".split( ":" ).inject( 0.0 ) { | sum, x | sum + x.to_f }

If this is something that you plan on using all the time you can  
define a new method on the String class like so:

class String
   def delimited_sum( delimiter = ' ' ) # Default delimiter is a space
     self.split( delimiter ).inject( 0.0 ) { | sum, x | sum + x.to_f }
   end
end

"5:5:5".delimited_sum( ':' )
=> 15

--
Wayne E. Seguin
Sr. Systems Architect & Systems Admin
wayneseguin@gmail.com




--Apple-Mail-3--644740706--