Iterate over array and add numbers of each object

[Joshua Muheim]

Hi all

number = 0;
objects.each do |o|
number += o.some_number
end
return number

I guess there's a much more beautiful way for this, or isn't? Something
like collect or so...

Thanks
Josh

 

[Stefano Crocco]

Alle Friday 03 October 2008, Joshua Muheim ha scritto:

Hi all

number = 0;
objects.each do |o|
number += o.some_number
end
return number

I guess there's a much more beautiful way for this, or isn't? Something
like collect or so...

Thanks
Josh

If objects is an array, or any other thing which mixes-in the Enumerable
module, you can use inject:

objects.inject(0){|tot, o| tot + o.some_number}

Stefano

 

[James Coglan]

[Note: parts of this message were removed to make it a legal post.]

number = 0;
objects.each do |o|
number += o.some_number
end
return number

I guess there's a much more beautiful way for this, or isn't? Something
like collect or so...

number = objects.inject(0) { |sum, obj| sum + obj.some_number }

 

[Farrel Lifson]

Hi all

number = 0;
objects.each do |o|
number += o.some_number
end
return number

This is what inject is for.

number = objects.inject(0) do |sum,o|
sum += o.some_number
end

Farrel

 

[Lloyd Linklater]

Is that an echo I hear?

 

[Erik Veenstra]

require "facets"

number = objects.map(&:some_number).sum

gegroet,
Erik V.