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comp.lang.ruby

array and data types

zabouth

7/7/2007 2:56:00 PM

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

--
Posted via http://www.ruby-....
3 Answers

dblack

7/7/2007 3:02:00 PM

0

Bojan Mihelac

7/7/2007 3:43:00 PM

0

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
>

sum = sum.split(":").map {|e| e.to_f}

would work.

best,
Bojan

--
Bojan Mihelac
-> Ruby on Rails and Web Developer Blog : http://source.m...

Pete Yandell

7/8/2007 12:16:00 PM

0

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

If you happen to have Rails (or just ActiveSupport) installed:

require 'rubygems'
require 'active_support'

'5:5:5'.split(':').map(&:to_f).sum
=> 15.0


Pete Yandell
http://no...